# San José crash hotspots: writer’s research file

Study window: **2020–2024**. Accessed **6 September 2026**. Primary scope: 2020–2024; official City archive downloaded 6 September 2026; points inside the 6 May 2026 municipal boundary; SJPD city streets and county expressways. The CHP addition is a conservative mapped highway subset. Combined figures are not complete citywide totals.

The original research ZIP was not available in the workspace or Downloads during this run. Its README, collector, tests, workbook and source registers therefore have not been audited. This study was acquired independently from original official endpoints.

## Twenty central findings

1. **Crashes in the fresh City 2020–2024 source export: 24359.** 2020–2024 City source inventory downloaded 6 September 2026; includes 226 rows outside the current official boundary. [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512). Calculation: `count rows in raw City archive before geographic exclusions`.

2. **City-reported crashes retained inside the official boundary: 24133.** 2020–2024; official City archive downloaded 6 September 2026; points inside the 6 May 2026 municipal boundary; SJPD city streets and county expressways;  [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512). Calculation: `source_system=CSJ_Vision_Zero; count crash_id`.

3. **City-reported fatal or severe-injury crashes: 1224.** 2020–2024; official City archive downloaded 6 September 2026; points inside the 6 May 2026 municipal boundary; SJPD city streets and county expressways;  [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512). Calculation: `count ksi_crash=True`.

4. **People killed in the retained City-reported crashes: 265.** 2020–2024; official City archive downloaded 6 September 2026; points inside the 6 May 2026 municipal boundary; SJPD city streets and county expressways;  [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512). Calculation: `sum fatalities`.

5. **People severely injured in the retained City-reported crashes: 1056.** 2020–2024; official City archive downloaded 6 September 2026; points inside the 6 May 2026 municipal boundary; SJPD city streets and county expressways;  [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512). Calculation: `sum severe_injuries`.

6. **Joint highest total in the eligible intersection table: CAPITOL EXPY & STORY RD and KING RD & STORY RD: 87 crashes each.** 2020–2024; official City archive downloaded 6 September 2026; points inside the 6 May 2026 municipal boundary; SJPD city streets and county expressways; Source-designated at/related crashes; not all crashes mentioning the street pair; tie retained [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512). Calculation: `top_intersections.csv all rows equal maximum total_crashes`.

7. **Highest KSI count in the eligible intersection table: CAPITOL EXPY & QUIMBY RD: 8 KSI crashes.** 2020–2024; official City archive downloaded 6 September 2026; points inside the 6 May 2026 municipal boundary; SJPD city streets and county expressways; Ties use total crashes; not statistical significance [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512). Calculation: `top_intersections.csv sort ksi_crashes desc`.

8. **Leading eligible intersection by pedestrian/bicycle-involved KSI crashes: CAPITOL AVE & MCKEE RD: 6 crashes.** 2020–2024; official City archive downloaded 6 September 2026; points inside the 6 May 2026 municipal boundary; SJPD city streets and county expressways; KSI may involve any injured person; mode-specific injury is a separate measure [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512). Calculation: `sort vulnerable_road_user_ksi_crashes desc`.

9. **Leading official PSC by nearby KSI crashes: Monterey Road: 55 KSI crashes.** 2020–2024; official City archive downloaded 6 September 2026; points inside the 6 May 2026 municipal boundary; SJPD city streets and county expressways; PSC counts can overlap at crossings [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/514). Calculation: `City records within30m of PSC geometry; count KSI`.

10. **City KSI crashes within 30m of an official PSC: 51.55% (631/1224).** 2020–2024; official City archive downloaded 6 September 2026; points inside the 6 May 2026 municipal boundary; SJPD city streets and county expressways; Independent analytical proximity, not the City official proximity rule [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/514). Calculation: `psc_validation.csv; radius_m=30; union of PSC buffers`.

11. **City crashes within 30m of an official PSC: 44.04% (10627/24133).** 2020–2024; official City archive downloaded 6 September 2026; points inside the 6 May 2026 municipal boundary; SJPD city streets and county expressways; Independent analytical proximity, not the City official proximity rule [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/514). Calculation: `psc_validation.csv; radius_m=30; union of PSC buffers`.

12. **KSI crashes recorded under dark lighting: 622 of 1224; 3 lighting-unknown.** 2020–2024; official City archive downloaded 6 September 2026; points inside the 6 May 2026 municipal boundary; SJPD city streets and county expressways; Dusk/dawn separate; unknown lighting not daytime [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512). Calculation: `KSI crash True AND lighting starts Dark`.

13. **Speeding-positive KSI crashes: 339.** 2020–2024; official City archive downloaded 6 September 2026; points inside the 6 May 2026 municipal boundary; SJPD city streets and county expressways; Reported coding; not an independent causal finding [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512). Calculation: `count speeding_crash=True AND ksi_crash=True`.

14. **Pedestrian-involved recorded-positive share of City crashes and KSI crashes: 5.63% of crashes; 28.68% of KSI crashes.** 2020–2024; official City archive downloaded 6 September 2026; points inside the 6 May 2026 municipal boundary; SJPD city streets and county expressways; Recorded positive involvement gives a lower bound where mode is unknown; any person may have the KSI outcome; unknown mode flags are documented [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512). Calculation: `positive pedestrian_crash / all City crashes; positive pedestrian_ksi_crash / all City KSI crashes`.

15. **Bicycle-involved recorded-positive share of City crashes and KSI crashes: 5.23% of crashes; 12.91% of KSI crashes.** 2020–2024; official City archive downloaded 6 September 2026; points inside the 6 May 2026 municipal boundary; SJPD city streets and county expressways; Recorded positive involvement gives a lower bound where mode is unknown; any person may have the KSI outcome; unknown mode flags are documented [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512). Calculation: `positive bicycle_crash / all City crashes; positive bicycle_ksi_crash / all City KSI crashes`.

16. **Year with most retained City crashes: 2024: 5576.** 2020–2024; official City archive downloaded 6 September 2026; points inside the 6 May 2026 municipal boundary; SJPD city streets and county expressways;  [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512). Calculation: `annual_summary.csv City source sort total_crashes`.

17. **Year with most retained City KSI crashes: 2021: 268.** 2020–2024; official City archive downloaded 6 September 2026; points inside the 6 May 2026 municipal boundary; SJPD city streets and county expressways;  [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512). Calculation: `annual_summary.csv City source sort ksi_crashes`.

18. **Hour with most retained City crashes: 17:00–17:59: 1658 crashes.** 2020–2024; official City archive downloaded 6 September 2026; points inside the 6 May 2026 municipal boundary; SJPD city streets and county expressways; Local Pacific wall time, not UTC [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512). Calculation: `group local hour; count crash_id`.

19. **Reviewed CHP highway crashes added to the canonical sample: 13844.** 2020–2024 CHP highway records downloaded 6 September 2026, inside current City boundary and passing route/time/overlap checks. Incomplete mapped subset; not all San José highway crashes. 2024 is provisional. [Official source](https://data.ca.gov/dataset/ccrs). Calculation: `canonical source_system != CSJ_Vision_Zero`.

20. **CHP records represented by exact City report matches, not added again: 8921.** 2020–2024 City/CHP source crosswalk downloaded 6 September 2026; includes matches to City records outside the core boundary. Unique normalized report keys and compatible dates; City record retained. [Official source](https://data.ca.gov/dataset/ccrs). Calculation: `reconciliation_qa.json exact_cross_source_matches`.


## Time, condition and collision patterns by source network

Each network is reported separately. Category counts describe recorded crashes; they are not rates per hour driven, trip, rainy day or vehicle-mile. KSI counts count crashes, not injured people. Unknown category rows remain visible in the tables.

### Month

**City-reported streets and county expressways:** 24,133 crashes and 1,224 KSI crashes; 24,133 crashes have a known month category and 0 have a missing/unknown category. The highest observed crash count is in August. August accounts for **2146 of 24133 crashes (8.89%); 103 of 1224 KSI crashes (8.42%)**. The maximum category KSI count is **117**, recorded in July. [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512); `month_summary.csv`.

**Reviewed CHP freeway subset:** 13,802 crashes and 369 KSI crashes; 13,802 crashes have a known month category and 0 have a missing/unknown category. The highest observed crash count is in October. October accounts for **1361 of 13802 crashes (9.86%); 39 of 369 KSI crashes (10.57%)**. The maximum category KSI count is **44**, recorded in September. [Official source](https://data.ca.gov/dataset/ccrs); `month_summary.csv`.

**Reviewed CHP nonfreeway state-highway subset:** 42 crashes and 0 KSI crashes; 42 crashes have a known month category and 0 have a missing/unknown category. The highest observed crash count is in August. August accounts for **6 of 42 crashes (14.29%); 0 of 0 KSI crashes (undefined)**. [Official source](https://data.ca.gov/dataset/ccrs); `month_summary.csv`.

### Day of week

**City-reported streets and county expressways:** 24,133 crashes and 1,224 KSI crashes; 24,133 crashes have a known day of week category and 0 have a missing/unknown category. The highest observed crash count is in Saturday. Saturday accounts for **3756 of 24133 crashes (15.56%); 199 of 1224 KSI crashes (16.26%)**. The maximum category KSI count is **224**, recorded in Sunday. [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512); `day_of_week_summary.csv`.

**Reviewed CHP freeway subset:** 13,802 crashes and 369 KSI crashes; 13,802 crashes have a known day of week category and 0 have a missing/unknown category. The highest observed crash count is in Friday. Friday accounts for **2274 of 13802 crashes (16.48%); 54 of 369 KSI crashes (14.63%)**. The maximum category KSI count is **70**, recorded in Saturday. [Official source](https://data.ca.gov/dataset/ccrs); `day_of_week_summary.csv`.

**Reviewed CHP nonfreeway state-highway subset:** 42 crashes and 0 KSI crashes; 42 crashes have a known day of week category and 0 have a missing/unknown category. The highest observed crash count is in Wednesday. Wednesday accounts for **9 of 42 crashes (21.43%); 0 of 0 KSI crashes (undefined)**. [Official source](https://data.ca.gov/dataset/ccrs); `day_of_week_summary.csv`.

### Hour

**City-reported streets and county expressways:** 24,133 crashes and 1,224 KSI crashes; 24,133 crashes have a known hour category and 0 have a missing/unknown category. The highest observed crash count is in 17:00–17:59. 17:00–17:59 accounts for **1658 of 24133 crashes (6.87%); 89 of 1224 KSI crashes (7.27%)**. The maximum category KSI count is **90**, recorded in 20:00–20:59. [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512); `hour_summary.csv`.

**Reviewed CHP freeway subset:** 13,802 crashes and 369 KSI crashes; 13,802 crashes have a known hour category and 0 have a missing/unknown category. The highest observed crash count is in 17:00–17:59. 17:00–17:59 accounts for **1451 of 13802 crashes (10.51%); 21 of 369 KSI crashes (5.69%)**. The maximum category KSI count is **28**, recorded in 22:00–22:59. [Official source](https://data.ca.gov/dataset/ccrs); `hour_summary.csv`.

**Reviewed CHP nonfreeway state-highway subset:** 42 crashes and 0 KSI crashes; 42 crashes have a known hour category and 0 have a missing/unknown category. The highest observed crash count is in 17:00–17:59. 17:00–17:59 accounts for **8 of 42 crashes (19.05%); 0 of 0 KSI crashes (undefined)**. [Official source](https://data.ca.gov/dataset/ccrs); `hour_summary.csv`.

### Weekday versus weekend

**City-reported streets and county expressways:** 24,133 crashes and 1,224 KSI crashes; 24,133 crashes have a known weekday versus weekend category and 0 have a missing/unknown category. Recorded Weekend. Weekend accounts for **7341 of 24133 crashes (30.42%); 423 of 1224 KSI crashes (34.56%)**. [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512); `is_weekend_summary.csv`.

**Reviewed CHP freeway subset:** 13,802 crashes and 369 KSI crashes; 13,802 crashes have a known weekday versus weekend category and 0 have a missing/unknown category. Recorded Weekend. Weekend accounts for **3132 of 13802 crashes (22.69%); 138 of 369 KSI crashes (37.40%)**. [Official source](https://data.ca.gov/dataset/ccrs); `is_weekend_summary.csv`.

**Reviewed CHP nonfreeway state-highway subset:** 42 crashes and 0 KSI crashes; 42 crashes have a known weekday versus weekend category and 0 have a missing/unknown category. Recorded Weekend. Weekend accounts for **11 of 42 crashes (26.19%); 0 of 0 KSI crashes (undefined)**. [Official source](https://data.ca.gov/dataset/ccrs); `is_weekend_summary.csv`.

### Weekday rush hours

**City-reported streets and county expressways:** 24,133 crashes and 1,224 KSI crashes; 24,133 crashes have a known weekday rush hours category and 0 have a missing/unknown category. Recorded Defined weekday rush hours. Defined weekday rush hours accounts for **5852 of 24133 crashes (24.25%); 245 of 1224 KSI crashes (20.02%)**. [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512); `rush_hour_summary.csv`.

**Reviewed CHP freeway subset:** 13,802 crashes and 369 KSI crashes; 13,802 crashes have a known weekday rush hours category and 0 have a missing/unknown category. Recorded Defined weekday rush hours. Defined weekday rush hours accounts for **4918 of 13802 crashes (35.63%); 60 of 369 KSI crashes (16.26%)**. [Official source](https://data.ca.gov/dataset/ccrs); `rush_hour_summary.csv`.

**Reviewed CHP nonfreeway state-highway subset:** 42 crashes and 0 KSI crashes; 42 crashes have a known weekday rush hours category and 0 have a missing/unknown category. Recorded Defined weekday rush hours. Defined weekday rush hours accounts for **15 of 42 crashes (35.71%); 0 of 0 KSI crashes (undefined)**. [Official source](https://data.ca.gov/dataset/ccrs); `rush_hour_summary.csv`.

### Clock-defined daytime versus nighttime

**City-reported streets and county expressways:** 24,133 crashes and 1,224 KSI crashes; 24,133 crashes have a known clock-defined daytime versus nighttime category and 0 have a missing/unknown category. Recorded 18:00–05:59. 18:00–05:59 accounts for **10452 of 24133 crashes (43.31%); 680 of 1224 KSI crashes (55.56%)**. [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512); `clock_night_18_06_summary.csv`.

**Reviewed CHP freeway subset:** 13,802 crashes and 369 KSI crashes; 13,802 crashes have a known clock-defined daytime versus nighttime category and 0 have a missing/unknown category. Recorded 18:00–05:59. 18:00–05:59 accounts for **4929 of 13802 crashes (35.71%); 236 of 369 KSI crashes (63.96%)**. [Official source](https://data.ca.gov/dataset/ccrs); `clock_night_18_06_summary.csv`.

**Reviewed CHP nonfreeway state-highway subset:** 42 crashes and 0 KSI crashes; 42 crashes have a known clock-defined daytime versus nighttime category and 0 have a missing/unknown category. Recorded 18:00–05:59. 18:00–05:59 accounts for **14 of 42 crashes (33.33%); 0 of 0 KSI crashes (undefined)**. [Official source](https://data.ca.gov/dataset/ccrs); `clock_night_18_06_summary.csv`.

### Reported lighting

**City-reported streets and county expressways:** 24,133 crashes and 1,224 KSI crashes; 22,022 crashes have a known reported lighting category and 2,111 have a missing/unknown category. The highest observed crash count is in Daylight. Daylight accounts for **13096 of 24133 crashes (54.27%); 547 of 1224 KSI crashes (44.69%)**. The maximum category KSI count is **575**, recorded in Dark - Street Light. [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512); `lighting_summary.csv`.

**Reviewed CHP freeway subset:** 13,802 crashes and 369 KSI crashes; 13,802 crashes have a known reported lighting category and 0 have a missing/unknown category. The highest observed crash count is in DAYLIGHT. DAYLIGHT accounts for **8903 of 13802 crashes (64.51%); 139 of 369 KSI crashes (37.67%)**. The maximum category KSI count is **139**, recorded in DAYLIGHT. [Official source](https://data.ca.gov/dataset/ccrs); `lighting_summary.csv`.

**Reviewed CHP nonfreeway state-highway subset:** 42 crashes and 0 KSI crashes; 42 crashes have a known reported lighting category and 0 have a missing/unknown category. The highest observed crash count is in DAYLIGHT. DAYLIGHT accounts for **27 of 42 crashes (64.29%); 0 of 0 KSI crashes (undefined)**. [Official source](https://data.ca.gov/dataset/ccrs); `lighting_summary.csv`.

### Reported weather

**City-reported streets and county expressways:** 24,133 crashes and 1,224 KSI crashes; 20,901 crashes have a known reported weather category and 3,232 have a missing/unknown category. The highest observed crash count is in Clear. Clear accounts for **18886 of 24133 crashes (78.26%); 1112 of 1224 KSI crashes (90.85%)**. The maximum category KSI count is **1112**, recorded in Clear. [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512); `weather_summary.csv`.

**Reviewed CHP freeway subset:** 13,802 crashes and 369 KSI crashes; 13,802 crashes have a known reported weather category and 0 have a missing/unknown category. The highest observed crash count is in CLEAR. CLEAR accounts for **11603 of 13802 crashes (84.07%); 328 of 369 KSI crashes (88.89%)**. The maximum category KSI count is **328**, recorded in CLEAR. [Official source](https://data.ca.gov/dataset/ccrs); `weather_summary.csv`.

**Reviewed CHP nonfreeway state-highway subset:** 42 crashes and 0 KSI crashes; 42 crashes have a known reported weather category and 0 have a missing/unknown category. The highest observed crash count is in CLEAR. CLEAR accounts for **36 of 42 crashes (85.71%); 0 of 0 KSI crashes (undefined)**. [Official source](https://data.ca.gov/dataset/ccrs); `weather_summary.csv`.

### Reported road surface

**City-reported streets and county expressways:** 24,133 crashes and 1,224 KSI crashes; 20,831 crashes have a known reported road surface category and 3,302 have a missing/unknown category. The highest observed crash count is in Dry. Dry accounts for **19399 of 24133 crashes (80.38%); 1150 of 1224 KSI crashes (93.95%)**. The maximum category KSI count is **1150**, recorded in Dry. [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512); `roadway_surface_summary.csv`.

**Reviewed CHP freeway subset:** 13,802 crashes and 369 KSI crashes; 13,802 crashes have a known reported road surface category and 0 have a missing/unknown category. The highest observed crash count is in Dry. Dry accounts for **12446 of 13802 crashes (90.18%); 343 of 369 KSI crashes (92.95%)**. The maximum category KSI count is **343**, recorded in Dry. [Official source](https://data.ca.gov/dataset/ccrs); `roadway_surface_summary.csv`.

**Reviewed CHP nonfreeway state-highway subset:** 42 crashes and 0 KSI crashes; 42 crashes have a known reported road surface category and 0 have a missing/unknown category. The highest observed crash count is in Dry. Dry accounts for **40 of 42 crashes (95.24%); 0 of 0 KSI crashes (undefined)**. [Official source](https://data.ca.gov/dataset/ccrs); `roadway_surface_summary.csv`.

### Reported roadway condition

**City-reported streets and county expressways:** 24,133 crashes and 1,224 KSI crashes; 20,506 crashes have a known reported roadway condition category and 3,627 have a missing/unknown category. The highest observed crash count is in No Unusual Conditions. No Unusual Conditions accounts for **20160 of 24133 crashes (83.54%); 1181 of 1224 KSI crashes (96.49%)**. The maximum category KSI count is **1181**, recorded in No Unusual Conditions. [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512); `roadway_condition_summary.csv`.

**Reviewed CHP freeway subset:** 13,802 crashes and 369 KSI crashes; 13,802 crashes have a known reported roadway condition category and 0 have a missing/unknown category. The highest observed crash count is in NO UNUSUAL CONDITIONS. NO UNUSUAL CONDITIONS accounts for **13528 of 13802 crashes (98.01%); 360 of 369 KSI crashes (97.56%)**. The maximum category KSI count is **360**, recorded in NO UNUSUAL CONDITIONS. [Official source](https://data.ca.gov/dataset/ccrs); `roadway_condition_summary.csv`.

**Reviewed CHP nonfreeway state-highway subset:** 42 crashes and 0 KSI crashes; 42 crashes have a known reported roadway condition category and 0 have a missing/unknown category. The highest observed crash count is in NO UNUSUAL CONDITIONS. NO UNUSUAL CONDITIONS accounts for **40 of 42 crashes (95.24%); 0 of 0 KSI crashes (undefined)**. [Official source](https://data.ca.gov/dataset/ccrs); `roadway_condition_summary.csv`.

### Collision type

**City-reported streets and county expressways:** 24,133 crashes and 1,224 KSI crashes; 24,133 crashes have a known collision type category and 0 have a missing/unknown category. The highest observed crash count is in Rear End. Rear End accounts for **6063 of 24133 crashes (25.12%); 88 of 1224 KSI crashes (7.19%)**. The maximum category KSI count is **353**, recorded in Vehicle/Pedestrian. [Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512); `collision_type_summary.csv`.

**Reviewed CHP freeway subset:** 13,802 crashes and 369 KSI crashes; 13,801 crashes have a known collision type category and 1 have a missing/unknown category. The highest observed crash count is in REAR END. REAR END accounts for **7031 of 13802 crashes (50.94%); 111 of 369 KSI crashes (30.08%)**. The maximum category KSI count is **118**, recorded in HIT OBJECT. [Official source](https://data.ca.gov/dataset/ccrs); `collision_type_summary.csv`.

**Reviewed CHP nonfreeway state-highway subset:** 42 crashes and 0 KSI crashes; 42 crashes have a known collision type category and 0 have a missing/unknown category. The highest observed crash count is in REAR END. REAR END accounts for **16 of 42 crashes (38.10%); 0 of 0 KSI crashes (undefined)**. [Official source](https://data.ca.gov/dataset/ccrs); `collision_type_summary.csv`.

### Recorded factors

Speeding, DUI/intoxication, unsafe movement, red-light violations and hit-and-run are overlapping positive-evidence categories. A crash may appear under more than one factor. Unknown factor status is not absence. Historical flag coverage and police coding differ by source and year; the counts do not establish fault or causation.

**City-reported streets and county expressways** (24,133 crashes; 1,224 KSI crashes):

- speeding: **5725 positive crashes; 339 positive KSI crashes; 17630 factor-known and 6503 factor-unknown crashes**.
- dui_intoxication_positive: **2155 positive crashes; 179 positive KSI crashes; 2155 factor-known and 21978 factor-unknown crashes**.
- unsafe_turn_or_movement: **2594 positive crashes; 96 positive KSI crashes; 17621 factor-known and 6512 factor-unknown crashes**.
- red_light_violation: **1982 positive crashes; 125 positive KSI crashes; 17617 factor-known and 6516 factor-unknown crashes**.
- hit_and_run: **3903 positive crashes; 130 positive KSI crashes; 3903 factor-known and 20230 factor-unknown crashes**.

[Official source](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512); `cause_summary.csv`.

**Reviewed CHP freeway subset** (13,802 crashes; 369 KSI crashes):

- speeding: **7745 positive crashes; 152 positive KSI crashes; 13400 factor-known and 402 factor-unknown crashes**.
- dui_intoxication_positive: **974 positive crashes; 104 positive KSI crashes; 974 factor-known and 12828 factor-unknown crashes**.
- unsafe_turn_or_movement: **3602 positive crashes; 141 positive KSI crashes; 13394 factor-known and 408 factor-unknown crashes**.
- red_light_violation: **4 positive crashes; 0 positive KSI crashes; 13393 factor-known and 409 factor-unknown crashes**.
- hit_and_run: **3317 positive crashes; 61 positive KSI crashes; 3317 factor-known and 10485 factor-unknown crashes**.

[Official source](https://data.ca.gov/dataset/ccrs); `cause_summary.csv`.

**Reviewed CHP nonfreeway state-highway subset** (42 crashes; 0 KSI crashes):

- speeding: **18 positive crashes; 0 positive KSI crashes; 39 factor-known and 3 factor-unknown crashes**.
- dui_intoxication_positive: **5 positive crashes; 0 positive KSI crashes; 5 factor-known and 37 factor-unknown crashes**.
- unsafe_turn_or_movement: **16 positive crashes; 0 positive KSI crashes; 39 factor-known and 3 factor-unknown crashes**.
- red_light_violation: **0 positive crashes; unknown positive KSI crashes; 39 factor-known and 3 factor-unknown crashes**.
- hit_and_run: **6 positive crashes; 0 positive KSI crashes; 6 factor-known and 36 factor-unknown crashes**.

[Official source](https://data.ca.gov/dataset/ccrs); `cause_summary.csv`.


Rush hour means weekdays 07:00–09:59 or 16:00–18:59; recorded dark lighting is separate from clock-night 18:00–05:59. A peak frequency does not establish peak risk per trip or hour travelled.

## Rankings and writer tables



Study period: **2020–2024**. Official source snapshot downloaded **6 September 2026**. City tables use the strict current official-boundary sample. Intersections use City-designated at/related crashes matched by official intersection ID and within 75 meters of that intersection geometry. Unknown is not zero. KSI means killed or severely injured. A pedestrian/bicycle-involved KSI crash does not establish which person suffered the severe outcome.

## Top 20 intersections by total reported crashes

| intersection_name | total_crashes | ksi_crashes | fatal_crashes | fatalities | severe_injuries | pedestrian_ksi_crashes | bicycle_ksi_crashes |
| --- | --- | --- | --- | --- | --- | --- | --- |
| CAPITOL EXPY & STORY RD | 87 | 3 | 0 | 0 | 4 | 1 | 0 |
| KING RD & STORY RD | 87 | 3 | 0 | 0 | 3 | 0 | 0 |
| CAPITOL EXPY & TULLY RD | 75 | 3 | 0 | 0 | 3 | 1 | 0 |
| CAPITOL EXPY & SENTER RD | 61 | 6 | 2 | 2 | 4 | 0 | 1 |
| CAPITOL EXPY & QUIMBY RD | 56 | 8 | 0 | 0 | 10 | 1 | 0 |
| CAPITOL AVE & MCKEE RD | 55 | 6 | 1 | 1 | 5 | 5 | 1 |
| CURTNER AVE/TULLY RD & MONTEREY RD | 54 | 4 | 1 | 1 | 3 | 2 | 0 |
| CAPITOL EXPY & OCALA AVE | 50 | 4 | 0 | 0 | 4 | 0 | 1 |
| CAPITOL EXPY & SNELL AVE | 48 | 4 | 2 | 2 | 3 | 2 | 0 |
| MCLAUGHLIN AVE & STORY RD | 48 | 2 | 0 | 0 | 2 | 0 | 0 |
| BLOSSOM HILL RD & SNELL AVE | 47 | 2 | 0 | 0 | 3 | 0 | 1 |
| ELEVENTH ST & KEYES ST | 43 | 4 | 0 | 0 | 4 | 0 | 0 |
| MCLAUGHLIN AVE & TULLY RD | 43 | 2 | 1 | 1 | 1 | 0 | 2 |
| SENTER RD & TULLY RD | 42 | 2 | 0 | 0 | 2 | 1 | 0 |
| KING RD & TULLY RD | 41 | 1 | 0 | 0 | 1 | 1 | 0 |
| CAPITOL EXPY & SILVER CREEK RD | 38 | 1 | 0 | 0 | 1 | 0 | 1 |
| CAPITOL EXPY & MCLAUGHLIN AVE | 37 | 0 | 0 | 0 | 0 | 0 | 0 |
| CAPITOL EXPY & SEVEN TREES BLVD | 37 | 1 | 0 | 0 | 1 | 0 | 0 |
| MCKEE RD & WHITE RD | 37 | 2 | 0 | 0 | 2 | 1 | 0 |
| ALUM ROCK AVE & CAPITOL AVE | 35 | 0 | 0 | 0 | 0 | 0 | 0 |

Source: [City crash archive](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512); `top_intersections.csv`, grouped by official intersection ID.

## Top 20 intersections by KSI crashes

| intersection_name | total_crashes | ksi_crashes | fatal_crashes | fatalities | severe_injuries | pedestrian_ksi_crashes | bicycle_ksi_crashes |
| --- | --- | --- | --- | --- | --- | --- | --- |
| CAPITOL EXPY & QUIMBY RD | 56 | 8 | 0 | 0 | 10 | 1 | 0 |
| CAPITOL EXPY & SENTER RD | 61 | 6 | 2 | 2 | 4 | 0 | 1 |
| CAPITOL AVE & MCKEE RD | 55 | 6 | 1 | 1 | 5 | 5 | 1 |
| CURTNER AVE/TULLY RD & MONTEREY RD | 54 | 4 | 1 | 1 | 3 | 2 | 0 |
| CAPITOL EXPY & OCALA AVE | 50 | 4 | 0 | 0 | 4 | 0 | 1 |
| CAPITOL EXPY & SNELL AVE | 48 | 4 | 2 | 2 | 3 | 2 | 0 |
| ELEVENTH ST & KEYES ST | 43 | 4 | 0 | 0 | 4 | 0 | 0 |
| ALMADEN EXPY & BRANHAM LN | 20 | 4 | 1 | 1 | 3 | 0 | 1 |
| FOURTH ST & SANTA CLARA ST | 20 | 4 | 0 | 0 | 4 | 1 | 2 |
| SANTA CLARA ST & TENTH ST | 19 | 4 | 2 | 2 | 4 | 1 | 0 |
| MERIDIAN AVE & PARKMOOR AVE | 16 | 4 | 2 | 2 | 2 | 2 | 0 |
| CAPITOL EXPY & STORY RD | 87 | 3 | 0 | 0 | 4 | 1 | 0 |
| KING RD & STORY RD | 87 | 3 | 0 | 0 | 3 | 0 | 0 |
| CAPITOL EXPY & TULLY RD | 75 | 3 | 0 | 0 | 3 | 1 | 0 |
| ABORN RD & SAN FELIPE RD/WHITE RD | 32 | 3 | 0 | 0 | 3 | 0 | 1 |
| ALMADEN EXPY & BLOSSOM HILL RD | 31 | 3 | 0 | 0 | 3 | 2 | 0 |
| PAYNE AVE & SAN TOMAS EXPY | 30 | 3 | 1 | 1 | 2 | 1 | 0 |
| CANOAS GARDEN AVE & CURTNER AVE | 26 | 3 | 2 | 2 | 1 | 2 | 0 |
| CURTNER AVE & GUADALUPE FWY/UNIFIED WAY | 26 | 3 | 0 | 0 | 3 | 2 | 1 |
| BAYSHORE FWY W & TULLY RD | 24 | 3 | 0 | 0 | 4 | 0 | 1 |

Source: [City crash archive](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512); `top_intersections.csv`, grouped by official intersection ID.

## Top intersections by fatalities

| intersection_name | total_crashes | ksi_crashes | fatal_crashes | fatalities | severe_injuries | pedestrian_ksi_crashes | bicycle_ksi_crashes |
| --- | --- | --- | --- | --- | --- | --- | --- |
| CAPITOL EXPY & SENTER RD | 61 | 6 | 2 | 2 | 4 | 0 | 1 |
| CAPITOL EXPY & SNELL AVE | 48 | 4 | 2 | 2 | 3 | 2 | 0 |
| ELEVENTH ST & SANTA CLARA ST | 29 | 2 | 2 | 2 | 0 | 1 | 0 |
| CANOAS GARDEN AVE & CURTNER AVE | 26 | 3 | 2 | 2 | 1 | 2 | 0 |
| SANTA CLARA ST & TENTH ST | 19 | 4 | 2 | 2 | 4 | 1 | 0 |
| MERIDIAN AVE & PARKMOOR AVE | 16 | 4 | 2 | 2 | 2 | 2 | 0 |
| ALEXANDER AVE/MUIRFIELD DR & ALUM ROCK AVE | 15 | 1 | 1 | 2 | 0 | 0 | 0 |
| ALAMEDA & NEWHALL ST | 14 | 2 | 2 | 2 | 0 | 1 | 0 |
| BLOSSOM HILL RD/DW & COTTLE RD | 11 | 1 | 1 | 2 | 1 | 0 | 0 |
| LAWRENCE EXPY & MITTY AVE | 10 | 1 | 1 | 2 | 2 | 0 | 0 |
| BLOSSOM HILL RD & WINFIELD BLVD | 9 | 1 | 1 | 2 | 0 | 0 | 0 |
| MONTEREY RD & PALM AVE | 9 | 2 | 2 | 2 | 1 | 1 | 1 |
| BERRYESSA RD/SUNCREST AVE & PIEDMONT RD | 6 | 2 | 2 | 2 | 0 | 0 | 0 |
| MONTEREY RD & VALLEYHAVEN WAY | 3 | 2 | 2 | 2 | 0 | 1 | 0 |
| OAKTON CT & OCALA AVE | 1 | 1 | 1 | 2 | 0 | 1 | 0 |
| CAPITOL AVE & MCKEE RD | 55 | 6 | 1 | 1 | 5 | 5 | 1 |
| CURTNER AVE/TULLY RD & MONTEREY RD | 54 | 4 | 1 | 1 | 3 | 2 | 0 |
| MCLAUGHLIN AVE & TULLY RD | 43 | 2 | 1 | 1 | 1 | 0 | 2 |
| ALUM ROCK AVE & KING RD | 31 | 2 | 1 | 1 | 2 | 0 | 1 |
| JACKSON AVE & STORY RD | 31 | 2 | 1 | 1 | 1 | 0 | 1 |

Source: [City crash archive](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512); `top_intersections.csv`, grouped by official intersection ID.

## Top intersections by severe injuries

| intersection_name | total_crashes | ksi_crashes | fatal_crashes | fatalities | severe_injuries | pedestrian_ksi_crashes | bicycle_ksi_crashes |
| --- | --- | --- | --- | --- | --- | --- | --- |
| CAPITOL EXPY & QUIMBY RD | 56 | 8 | 0 | 0 | 10 | 1 | 0 |
| CAPITOL AVE & MCKEE RD | 55 | 6 | 1 | 1 | 5 | 5 | 1 |
| CAPITOL EXPY & STORY RD | 87 | 3 | 0 | 0 | 4 | 1 | 0 |
| CAPITOL EXPY & SENTER RD | 61 | 6 | 2 | 2 | 4 | 0 | 1 |
| CAPITOL EXPY & OCALA AVE | 50 | 4 | 0 | 0 | 4 | 0 | 1 |
| ELEVENTH ST & KEYES ST | 43 | 4 | 0 | 0 | 4 | 0 | 0 |
| ALUM ROCK AVE & WHITE RD | 25 | 2 | 0 | 0 | 4 | 0 | 0 |
| BAYSHORE FWY W & TULLY RD | 24 | 3 | 0 | 0 | 4 | 0 | 1 |
| FOURTH ST & SANTA CLARA ST | 20 | 4 | 0 | 0 | 4 | 1 | 2 |
| SANTA CLARA ST & TENTH ST | 19 | 4 | 2 | 2 | 4 | 1 | 0 |
| KING RD & STORY RD | 87 | 3 | 0 | 0 | 3 | 0 | 0 |
| CAPITOL EXPY & TULLY RD | 75 | 3 | 0 | 0 | 3 | 1 | 0 |
| CURTNER AVE/TULLY RD & MONTEREY RD | 54 | 4 | 1 | 1 | 3 | 2 | 0 |
| CAPITOL EXPY & SNELL AVE | 48 | 4 | 2 | 2 | 3 | 2 | 0 |
| BLOSSOM HILL RD & SNELL AVE | 47 | 2 | 0 | 0 | 3 | 0 | 1 |
| ABORN RD & SAN FELIPE RD/WHITE RD | 32 | 3 | 0 | 0 | 3 | 0 | 1 |
| ALMADEN EXPY & BLOSSOM HILL RD | 31 | 3 | 0 | 0 | 3 | 2 | 0 |
| CURTNER AVE & GUADALUPE FWY/UNIFIED WAY | 26 | 3 | 0 | 0 | 3 | 2 | 1 |
| ALMADEN EXPY & BRANHAM LN | 20 | 4 | 1 | 1 | 3 | 0 | 1 |
| FIRST ST & MATRIX BLVD | 17 | 3 | 0 | 0 | 3 | 1 | 0 |

Source: [City crash archive](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512); `top_intersections.csv`, grouped by official intersection ID.

## Top intersections by pedestrian/bicycle-involved KSI crashes

| intersection_name | total_crashes | ksi_crashes | fatal_crashes | fatalities | severe_injuries | pedestrian_ksi_crashes | bicycle_ksi_crashes | vulnerable_road_user_ksi_crashes |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| CAPITOL AVE & MCKEE RD | 55 | 6 | 1 | 1 | 5 | 5 | 1 | 6 |
| CURTNER AVE & GUADALUPE FWY/UNIFIED WAY | 26 | 3 | 0 | 0 | 3 | 2 | 1 | 3 |
| FOURTH ST & SANTA CLARA ST | 20 | 4 | 0 | 0 | 4 | 1 | 2 | 3 |
| CONCOURSE DR & LUNDY AVE | 3 | 3 | 0 | 0 | 3 | 3 | 0 | 3 |
| CURTNER AVE/TULLY RD & MONTEREY RD | 54 | 4 | 1 | 1 | 3 | 2 | 0 | 2 |
| CAPITOL EXPY & SNELL AVE | 48 | 4 | 2 | 2 | 3 | 2 | 0 | 2 |
| MCLAUGHLIN AVE & TULLY RD | 43 | 2 | 1 | 1 | 1 | 0 | 2 | 2 |
| ALMADEN EXPY & BLOSSOM HILL RD | 31 | 3 | 0 | 0 | 3 | 2 | 0 | 2 |
| CANOAS GARDEN AVE & CURTNER AVE | 26 | 3 | 2 | 2 | 1 | 2 | 0 | 2 |
| BAL HARBOR WAY/MCCREERY AVE & STORY RD | 23 | 2 | 0 | 0 | 2 | 2 | 0 | 2 |
| KEYES ST & SEVENTH ST | 23 | 2 | 0 | 0 | 2 | 0 | 2 | 2 |
| SEVENTH ST & VIRGINIA ST/I-280 SB | 19 | 2 | 0 | 0 | 2 | 0 | 2 | 2 |
| MERIDIAN AVE & PARKMOOR AVE | 16 | 4 | 2 | 2 | 2 | 2 | 0 | 2 |
| MONTEREY RD & SAN JOSE AVE | 11 | 2 | 1 | 1 | 1 | 2 | 0 | 2 |
| SAN FERNANDO ST & TENTH ST | 11 | 2 | 0 | 0 | 2 | 2 | 0 | 2 |
| CIMINO AVE & LITTLE ORCHARD ST | 9 | 2 | 0 | 0 | 2 | 0 | 2 | 2 |
| MONTEREY RD & PALM AVE | 9 | 2 | 2 | 2 | 1 | 1 | 1 | 2 |
| MARTHA ST & TENTH ST | 8 | 2 | 0 | 0 | 2 | 1 | 1 | 2 |
| SAN GREGORIO WAY & SENTER RD | 8 | 2 | 0 | 0 | 2 | 2 | 0 | 2 |
| EMPIRE ST & THIRTEENTH ST | 5 | 2 | 0 | 0 | 2 | 0 | 2 | 2 |

Source: [City crash archive](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512); `top_intersections.csv`, grouped by official intersection ID.

## Top intersections by speeding-positive KSI crashes

| intersection_name | total_crashes | ksi_crashes | fatal_crashes | fatalities | severe_injuries | pedestrian_ksi_crashes | bicycle_ksi_crashes | speeding_ksi_crashes |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| CAPITOL EXPY & QUIMBY RD | 56 | 8 | 0 | 0 | 10 | 1 | 0 | 2 |
| MCLAUGHLIN AVE & STORY RD | 48 | 2 | 0 | 0 | 2 | 0 | 0 | 2 |
| CAPITOL EXPY/SAN ANTONIO SR & JACKSON AVE | 31 | 2 | 0 | 0 | 2 | 0 | 0 | 2 |
| ALUM ROCK AVE & WHITE RD | 25 | 2 | 0 | 0 | 4 | 0 | 0 | 2 |
| BLOSSOM HILL RD & SANTA TERESA BLVD | 19 | 2 | 0 | 0 | 2 | 0 | 0 | 2 |
| MERIDIAN AVE & PARKMOOR AVE | 16 | 4 | 2 | 2 | 2 | 2 | 0 | 2 |
| GALAHAD AVE & STORY RD | 14 | 2 | 1 | 1 | 1 | 1 | 0 | 2 |
| DANIEL MALONEY DR/ELKINS WAY & NIEMAN BLVD | 9 | 2 | 1 | 1 | 2 | 0 | 0 | 2 |
| BERRYESSA RD/SUNCREST AVE & PIEDMONT RD | 6 | 2 | 2 | 2 | 0 | 0 | 0 | 2 |
| CAPITOL EXPY & STORY RD | 87 | 3 | 0 | 0 | 4 | 1 | 0 | 1 |
| CAPITOL EXPY & TULLY RD | 75 | 3 | 0 | 0 | 3 | 1 | 0 | 1 |
| CAPITOL EXPY & SENTER RD | 61 | 6 | 2 | 2 | 4 | 0 | 1 | 1 |
| CURTNER AVE/TULLY RD & MONTEREY RD | 54 | 4 | 1 | 1 | 3 | 2 | 0 | 1 |
| CAPITOL EXPY & OCALA AVE | 50 | 4 | 0 | 0 | 4 | 0 | 1 | 1 |
| ELEVENTH ST & KEYES ST | 43 | 4 | 0 | 0 | 4 | 0 | 0 | 1 |
| CAPITOL EXPY & SILVER CREEK RD | 38 | 1 | 0 | 0 | 1 | 0 | 1 | 1 |
| CAPITOL AVE/EXCALIBUR DR & CAPITOL EXPY | 32 | 1 | 0 | 0 | 1 | 0 | 0 | 1 |
| ALMADEN EXPY & BLOSSOM HILL RD | 31 | 3 | 0 | 0 | 3 | 2 | 0 | 1 |
| PAYNE AVE & SAN TOMAS EXPY | 30 | 3 | 1 | 1 | 2 | 1 | 0 | 1 |
| ALUM ROCK AVE & JACKSON AVE | 29 | 1 | 0 | 0 | 1 | 0 | 0 | 1 |

Source: [City crash archive](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512); `top_intersections.csv`, grouped by official intersection ID.

## Official Priority Safety Corridors, 30m proximity

| corridor_name | total_crashes | ksi_crashes | fatalities | severe_injuries |
| --- | --- | --- | --- | --- |
| Monterey Road | 648 | 55 | 15 | 43 |
| Tully Rd | 798 | 46 | 12 | 38 |
| Capitol Expressway | 975 | 44 | 9 | 40 |
| Senter Road | 516 | 44 | 9 | 35 |
| Story Rd | 816 | 40 | 9 | 35 |
| White Rd | 548 | 39 | 14 | 28 |
| Blossom Hill Rd | 535 | 35 | 5 | 32 |
| Santa Clara St | 523 | 32 | 6 | 32 |
| First St | 570 | 30 | 3 | 32 |
| McKee Road | 448 | 29 | 8 | 23 |
| Quimby Rd | 204 | 26 | 5 | 25 |
| Santa Teresa Blvd | 272 | 25 | 7 | 18 |
| Curtner Ave | 380 | 23 | 5 | 18 |
| Capitol Ave | 382 | 22 | 4 | 18 |
| Meridian Ave | 369 | 22 | 4 | 18 |
| Almaden Exp | 387 | 22 | 8 | 19 |
| Alum Rock Ave | 396 | 21 | 4 | 21 |
| Jackson Av | 351 | 20 | 8 | 12 |
| King Road | 652 | 19 | 5 | 16 |
| 10th St | 313 | 19 | 4 | 18 |

[City PSC geometry](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/514); overlapping corridor counts must not be summed.

## Annual counts, separated by source network

| analysis_network | year | total_crashes | ksi_crashes | fatalities | severe_injuries |
| --- | --- | --- | --- | --- | --- |
| city_street_source | 2020 | 4310 | 250 | 48 | 227 |
| city_street_source | 2021 | 4664 | 268 | 58 | 235 |
| city_street_source | 2022 | 5096 | 236 | 63 | 189 |
| city_street_source | 2023 | 4487 | 245 | 50 | 210 |
| city_street_source | 2024 | 5576 | 225 | 46 | 195 |
| state_freeway | 2020 | 1998 | 64 | 18 | 53 |
| state_freeway | 2021 | 2577 | 85 | 24 | 69 |
| state_freeway | 2022 | 2991 | 74 | 21 | 62 |
| state_freeway | 2023 | 3068 | 80 | 23 | 67 |
| state_freeway | 2024 | 3168 | 66 | 20 | 50 |
| state_highway | 2020 | 8 | 0 | 0 | 0 |
| state_highway | 2021 | 5 | 0 | 0 | 0 |
| state_highway | 2022 | 4 | 0 | 0 | 0 |
| state_highway | 2023 | 9 | 0 | 0 | 0 |
| state_highway | 2024 | 16 | 0 | 0 | 0 |

Highways are the reviewed, mapped subset.

## Road segments by KSI: proximity bins, not risk rates

| network_scope | segment_name | length_m | total_crashes | ksi_crashes | fatalities | severe_injuries |
| --- | --- | --- | --- | --- | --- | --- |
| City-reported street proximity | MCKEE RD · component 0 / segment 6 | 402.34 | 83 | 7 | 0 | 7 |
| City-reported street proximity | MONTEREY RD · component 0 / segment 4 | 402.34 | 78 | 7 | 3 | 4 |
| City-reported street proximity | QUIMBY RD · component 0 / segment 3 | 402.34 | 63 | 7 | 0 | 9 |
| City-reported street proximity | E CAPITOL EXPY · component 0 / segment 4 | 402.34 | 61 | 7 | 2 | 5 |
| City-reported street proximity | E SANTA CLARA ST · component 0 / segment 2 | 402.34 | 54 | 7 | 4 | 5 |
| City-reported street proximity | MONTEREY RD · component 0 / segment 3 | 402.34 | 37 | 7 | 3 | 4 |
| City-reported street proximity | KEYES ST · component 0 / segment 1 | 402.34 | 39 | 6 | 0 | 6 |
| City-reported street proximity | TULLY RD · component 1 / segment 2 | 402.34 | 21 | 6 | 2 | 6 |
| City-reported street proximity | STORY RD · component 2 / segment 4 | 402.34 | 124 | 5 | 1 | 7 |
| City-reported street proximity | E SANTA CLARA ST · component 0 / segment 0 | 402.34 | 86 | 4 | 0 | 4 |
| City-reported street proximity | TULLY RD · component 1 / segment 6 | 402.34 | 83 | 4 | 1 | 3 |
| City-reported street proximity | OAKLAND RD · component 0 / segment 11 | 402.34 | 69 | 4 | 0 | 4 |
| City-reported street proximity | SARATOGA AVE · component 3 / segment 6 | 402.34 | 59 | 4 | 1 | 3 |
| City-reported street proximity | STORY RD · component 2 / segment 7 | 402.34 | 59 | 4 | 1 | 3 |
| CHP reviewed highway subset | Route 280 · component 160400 / segment 2 | 402.34 | 55 | 4 | 2 | 2 |
| CHP reviewed highway subset | Route 101 · component 157504 / segment 2 | 402.34 | 50 | 4 | 0 | 4 |
| City-reported street proximity | W CAPITOL EXPY · component 0 / segment 4 | 402.34 | 45 | 4 | 2 | 3 |
| CHP reviewed highway subset | Route 101 · component 157404 / segment 0 | 402.34 | 41 | 4 | 2 | 2 |
| CHP reviewed highway subset | Route 101 · component 157504 / segment 0 | 402.34 | 38 | 4 | 3 | 1 |
| City-reported street proximity | STORY RD · component 2 / segment 11 | 402.34 | 37 | 4 | 0 | 4 |

Nearest-centerline assignment can be ambiguous at intersections. Main analysis uses up to 0.25 mile; half-mile and intersection-radius sensitivity files accompany this table.

## Reviewed highway route totals: mapped subset

| corridor_name | total_crashes | ksi_crashes | fatalities | severe_injuries |
| --- | --- | --- | --- | --- |
| Route 101 | 3791 | 134 | 48 | 94 |
| Route 280 | 2945 | 62 | 12 | 55 |
| Route 87 | 1739 | 43 | 12 | 32 |
| Route 680 | 1436 | 42 | 12 | 35 |
| Route 85 | 1163 | 37 | 13 | 37 |
| Route 880 | 1995 | 34 | 5 | 33 |
| Route 237 | 598 | 12 | 2 | 10 |
| Route 17 | 176 | 5 | 2 | 5 |
| Route 130 | 1 | 0 | 0 | 0 |

CHP records passing City-boundary, same-route geometry, time and overlap checks. This is not complete highway coverage.

## Exposure-adjusted comparison: selected eligible mainline intervals

October 2022–September 2023; 22 eligible intervals only. Rates per 100 million vehicle-miles. Poisson confidence intervals condition on a fixed estimated exposure denominator.

| route | from_station | to_station | matched_mainline_crashes_50m | crashes_per_100_million_vehicle_miles | crash_rate_poisson_95ci_lower | crash_rate_poisson_95ci_upper |
| --- | --- | --- | --- | --- | --- | --- |
| 280 | SAN JOSE, JCT. RTE. 82 | GUADALUPE SEPARATION | 47 | 356.22 | 261.74 | 473.70 |
| 880 | SAN JOSE, NORTH FIRST STREET | SAN JOSE, JCT. RTE. 101 | 58 | 215.92 | 163.96 | 279.13 |
| 680 | SAN JOSE, JCT. RTE. 130 | SAN JOSE, MC KEE ROAD | 52 | 129.31 | 96.58 | 169.58 |
| 101 | SAN JOSE, JCT. RTE. 880 | SAN JOSE, NORTH FOURTH STREET CONNECTIONS | 30 | 126.94 | 85.64 | 181.21 |
| 237 | SAN JOSE, NORTH FIRST/ TAYLOR STREETS | SAN JOSE, ZANKER ROAD | 58 | 124.31 | 94.40 | 160.71 |
| 880 | SAN JOSE, JCT. RTE. 82 | SAN JOSE, COLEMAN AVENUE | 33 | 103.22 | 71.05 | 144.96 |
| 880 | SAN JOSE, OLD BAYSHORE HIGHWAY | COYOTE CREEK | 62 | 94.69 | 72.60 | 121.39 |
| 87 | ALMADEN EXPRESSWAY | SAN JOSE, LELONG STREET | 38 | 91.76 | 64.93 | 125.95 |
| 101 | SAN JOSE, JCT. RTE. 130 EAST | SAN JOSE, MC KEE ROAD | 22 | 88.77 | 55.63 | 134.41 |
| 280 | MCLAUGHLIN AVENUE | SAN JOSE, 10TH STREET | 63 | 88.52 | 68.02 | 113.26 |

See `exposure_analysis.md` for exclusions, calibration and all intervals. This is not a citywide or five-year risk ranking.

## Month, separated by source network

| analysis_network | month | total_crashes | ksi_crashes | ksi_crashes_known_crashes | fatalities |
| --- | --- | --- | --- | --- | --- |
| City-reported streets and county expressways | January | 2038 | 101 | 2038 | 20 |
| City-reported streets and county expressways | February | 2012 | 103 | 2012 | 22 |
| City-reported streets and county expressways | March | 1946 | 85 | 1946 | 21 |
| City-reported streets and county expressways | April | 1774 | 105 | 1774 | 23 |
| City-reported streets and county expressways | May | 1975 | 102 | 1975 | 22 |
| City-reported streets and county expressways | June | 2135 | 112 | 2135 | 26 |
| City-reported streets and county expressways | July | 2103 | 117 | 2103 | 26 |
| City-reported streets and county expressways | August | 2146 | 103 | 2146 | 21 |
| City-reported streets and county expressways | September | 2024 | 104 | 2024 | 33 |
| City-reported streets and county expressways | October | 2096 | 102 | 2096 | 14 |
| City-reported streets and county expressways | November | 1975 | 101 | 1975 | 14 |
| City-reported streets and county expressways | December | 1909 | 89 | 1909 | 23 |
| Reviewed CHP freeway subset | January | 1171 | 29 | 1171 | 8 |
| Reviewed CHP freeway subset | February | 1081 | 30 | 1081 | 10 |
| Reviewed CHP freeway subset | March | 1124 | 28 | 1124 | 12 |
| Reviewed CHP freeway subset | April | 930 | 21 | 930 | 3 |
| Reviewed CHP freeway subset | May | 1071 | 32 | 1071 | 14 |
| Reviewed CHP freeway subset | June | 980 | 22 | 980 | 4 |
| Reviewed CHP freeway subset | July | 1107 | 32 | 1107 | 8 |
| Reviewed CHP freeway subset | August | 1194 | 34 | 1194 | 12 |
| Reviewed CHP freeway subset | September | 1186 | 44 | 1186 | 14 |
| Reviewed CHP freeway subset | October | 1361 | 39 | 1361 | 6 |
| Reviewed CHP freeway subset | November | 1290 | 29 | 1290 | 5 |
| Reviewed CHP freeway subset | December | 1307 | 29 | 1307 | 10 |
| Reviewed CHP nonfreeway state-highway subset | January | 3 | 0 | 3 | 0 |
| Reviewed CHP nonfreeway state-highway subset | February | 4 | 0 | 4 | 0 |
| Reviewed CHP nonfreeway state-highway subset | March | 3 | 0 | 3 | 0 |
| Reviewed CHP nonfreeway state-highway subset | April | 4 | 0 | 4 | 0 |
| Reviewed CHP nonfreeway state-highway subset | May | 3 | 0 | 3 | 0 |
| Reviewed CHP nonfreeway state-highway subset | June | 3 | 0 | 3 | 0 |
| Reviewed CHP nonfreeway state-highway subset | July | 2 | 0 | 2 | 0 |
| Reviewed CHP nonfreeway state-highway subset | August | 6 | 0 | 6 | 0 |
| Reviewed CHP nonfreeway state-highway subset | September | 3 | 0 | 3 | 0 |
| Reviewed CHP nonfreeway state-highway subset | October | 4 | 0 | 4 | 0 |
| Reviewed CHP nonfreeway state-highway subset | November | 2 | 0 | 2 | 0 |
| Reviewed CHP nonfreeway state-highway subset | December | 5 | 0 | 5 | 0 |

Sources: [City crash archive](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512), [CHP CCRS](https://data.ca.gov/dataset/ccrs); `month_summary.csv`. A category total is observed frequency, not exposure-adjusted risk. `ksi_crashes_known_crashes` is the number of rows with a known KSI flag.

## Day of week, separated by source network

| analysis_network | day_of_week | total_crashes | ksi_crashes | ksi_crashes_known_crashes | fatalities |
| --- | --- | --- | --- | --- | --- |
| City-reported streets and county expressways | Friday | 3749 | 185 | 3749 | 40 |
| City-reported streets and county expressways | Monday | 3168 | 171 | 3168 | 35 |
| City-reported streets and county expressways | Saturday | 3756 | 199 | 3756 | 39 |
| City-reported streets and county expressways | Sunday | 3585 | 224 | 3585 | 41 |
| City-reported streets and county expressways | Thursday | 3272 | 153 | 3272 | 39 |
| City-reported streets and county expressways | Tuesday | 3285 | 148 | 3285 | 36 |
| City-reported streets and county expressways | Wednesday | 3318 | 144 | 3318 | 35 |
| Reviewed CHP freeway subset | Friday | 2274 | 54 | 2274 | 13 |
| Reviewed CHP freeway subset | Monday | 1882 | 47 | 1882 | 12 |
| Reviewed CHP freeway subset | Saturday | 1771 | 70 | 1771 | 17 |
| Reviewed CHP freeway subset | Sunday | 1361 | 68 | 1361 | 24 |
| Reviewed CHP freeway subset | Thursday | 2099 | 36 | 2099 | 8 |
| Reviewed CHP freeway subset | Tuesday | 2201 | 51 | 2201 | 14 |
| Reviewed CHP freeway subset | Wednesday | 2214 | 43 | 2214 | 18 |
| Reviewed CHP nonfreeway state-highway subset | Friday | 6 | 0 | 6 | 0 |
| Reviewed CHP nonfreeway state-highway subset | Monday | 5 | 0 | 5 | 0 |
| Reviewed CHP nonfreeway state-highway subset | Saturday | 7 | 0 | 7 | 0 |
| Reviewed CHP nonfreeway state-highway subset | Sunday | 4 | 0 | 4 | 0 |
| Reviewed CHP nonfreeway state-highway subset | Thursday | 5 | 0 | 5 | 0 |
| Reviewed CHP nonfreeway state-highway subset | Tuesday | 6 | 0 | 6 | 0 |
| Reviewed CHP nonfreeway state-highway subset | Wednesday | 9 | 0 | 9 | 0 |

Sources: [City crash archive](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512), [CHP CCRS](https://data.ca.gov/dataset/ccrs); `day_of_week_summary.csv`. A category total is observed frequency, not exposure-adjusted risk. `ksi_crashes_known_crashes` is the number of rows with a known KSI flag.

## Hour, separated by source network

| analysis_network | hour | total_crashes | ksi_crashes | ksi_crashes_known_crashes | fatalities |
| --- | --- | --- | --- | --- | --- |
| City-reported streets and county expressways | 00:00–00:59 | 835 | 49 | 835 | 9 |
| City-reported streets and county expressways | 01:00–01:59 | 640 | 59 | 640 | 11 |
| City-reported streets and county expressways | 02:00–02:59 | 631 | 33 | 631 | 7 |
| City-reported streets and county expressways | 03:00–03:59 | 403 | 26 | 403 | 7 |
| City-reported streets and county expressways | 04:00–04:59 | 325 | 19 | 325 | 8 |
| City-reported streets and county expressways | 05:00–05:59 | 365 | 23 | 365 | 7 |
| City-reported streets and county expressways | 06:00–06:59 | 508 | 32 | 508 | 11 |
| City-reported streets and county expressways | 07:00–07:59 | 853 | 30 | 853 | 8 |
| City-reported streets and county expressways | 08:00–08:59 | 1154 | 39 | 1154 | 13 |
| City-reported streets and county expressways | 09:00–09:59 | 867 | 22 | 867 | 6 |
| City-reported streets and county expressways | 10:00–10:59 | 920 | 30 | 920 | 5 |
| City-reported streets and county expressways | 11:00–11:59 | 1071 | 39 | 1071 | 4 |
| City-reported streets and county expressways | 12:00–12:59 | 1238 | 42 | 1238 | 11 |
| City-reported streets and county expressways | 13:00–13:59 | 1179 | 57 | 1179 | 9 |
| City-reported streets and county expressways | 14:00–14:59 | 1317 | 35 | 1317 | 3 |
| City-reported streets and county expressways | 15:00–15:59 | 1396 | 56 | 1396 | 9 |
| City-reported streets and county expressways | 16:00–16:59 | 1520 | 73 | 1520 | 17 |
| City-reported streets and county expressways | 17:00–17:59 | 1658 | 89 | 1658 | 13 |
| City-reported streets and county expressways | 18:00–18:59 | 1523 | 80 | 1523 | 21 |
| City-reported streets and county expressways | 19:00–19:59 | 1330 | 76 | 1330 | 12 |
| City-reported streets and county expressways | 20:00–20:59 | 1155 | 90 | 1155 | 16 |
| City-reported streets and county expressways | 21:00–21:59 | 1167 | 88 | 1167 | 23 |
| City-reported streets and county expressways | 22:00–22:59 | 1090 | 72 | 1090 | 18 |
| City-reported streets and county expressways | 23:00–23:59 | 988 | 65 | 988 | 17 |
| Reviewed CHP freeway subset | 00:00–00:59 | 332 | 25 | 332 | 4 |
| Reviewed CHP freeway subset | 01:00–01:59 | 265 | 24 | 265 | 9 |
| Reviewed CHP freeway subset | 02:00–02:59 | 257 | 20 | 257 | 6 |
| Reviewed CHP freeway subset | 03:00–03:59 | 212 | 15 | 212 | 5 |
| Reviewed CHP freeway subset | 04:00–04:59 | 173 | 21 | 173 | 12 |
| Reviewed CHP freeway subset | 05:00–05:59 | 361 | 9 | 361 | 6 |
| Reviewed CHP freeway subset | 06:00–06:59 | 450 | 12 | 450 | 3 |
| Reviewed CHP freeway subset | 07:00–07:59 | 587 | 11 | 587 | 2 |
| Reviewed CHP freeway subset | 08:00–08:59 | 772 | 16 | 772 | 2 |
| Reviewed CHP freeway subset | 09:00–09:59 | 532 | 8 | 532 | 1 |
| Reviewed CHP freeway subset | 10:00–10:59 | 406 | 6 | 406 | 1 |
| Reviewed CHP freeway subset | 11:00–11:59 | 444 | 8 | 444 | 5 |
| Reviewed CHP freeway subset | 12:00–12:59 | 527 | 5 | 527 | 1 |
| Reviewed CHP freeway subset | 13:00–13:59 | 557 | 6 | 557 | 0 |
| Reviewed CHP freeway subset | 14:00–14:59 | 761 | 11 | 761 | 1 |
| Reviewed CHP freeway subset | 15:00–15:59 | 1159 | 17 | 1159 | 5 |
| Reviewed CHP freeway subset | 16:00–16:59 | 1227 | 12 | 1227 | 2 |
| Reviewed CHP freeway subset | 17:00–17:59 | 1451 | 21 | 1451 | 4 |
| Reviewed CHP freeway subset | 18:00–18:59 | 1127 | 17 | 1127 | 0 |
| Reviewed CHP freeway subset | 19:00–19:59 | 597 | 15 | 597 | 3 |
| Reviewed CHP freeway subset | 20:00–20:59 | 405 | 17 | 405 | 7 |
| Reviewed CHP freeway subset | 21:00–21:59 | 449 | 18 | 449 | 5 |
| Reviewed CHP freeway subset | 22:00–22:59 | 403 | 28 | 403 | 14 |
| Reviewed CHP freeway subset | 23:00–23:59 | 348 | 27 | 348 | 8 |
| Reviewed CHP nonfreeway state-highway subset | 00:00–00:59 | 1 | 0 | 1 | 0 |
| Reviewed CHP nonfreeway state-highway subset | 01:00–01:59 | 1 | 0 | 1 | 0 |
| Reviewed CHP nonfreeway state-highway subset | 02:00–02:59 | 1 | 0 | 1 | 0 |
| Reviewed CHP nonfreeway state-highway subset | 03:00–03:59 | 1 | 0 | 1 | 0 |
| Reviewed CHP nonfreeway state-highway subset | 06:00–06:59 | 3 | 0 | 3 | 0 |
| Reviewed CHP nonfreeway state-highway subset | 07:00–07:59 | 2 | 0 | 2 | 0 |
| Reviewed CHP nonfreeway state-highway subset | 08:00–08:59 | 2 | 0 | 2 | 0 |
| Reviewed CHP nonfreeway state-highway subset | 09:00–09:59 | 2 | 0 | 2 | 0 |
| Reviewed CHP nonfreeway state-highway subset | 10:00–10:59 | 1 | 0 | 1 | 0 |
| Reviewed CHP nonfreeway state-highway subset | 11:00–11:59 | 2 | 0 | 2 | 0 |
| Reviewed CHP nonfreeway state-highway subset | 13:00–13:59 | 2 | 0 | 2 | 0 |
| Reviewed CHP nonfreeway state-highway subset | 15:00–15:59 | 3 | 0 | 3 | 0 |
| Reviewed CHP nonfreeway state-highway subset | 16:00–16:59 | 3 | 0 | 3 | 0 |
| Reviewed CHP nonfreeway state-highway subset | 17:00–17:59 | 8 | 0 | 8 | 0 |
| Reviewed CHP nonfreeway state-highway subset | 18:00–18:59 | 2 | 0 | 2 | 0 |
| Reviewed CHP nonfreeway state-highway subset | 19:00–19:59 | 3 | 0 | 3 | 0 |
| Reviewed CHP nonfreeway state-highway subset | 20:00–20:59 | 1 | 0 | 1 | 0 |
| Reviewed CHP nonfreeway state-highway subset | 21:00–21:59 | 3 | 0 | 3 | 0 |
| Reviewed CHP nonfreeway state-highway subset | 23:00–23:59 | 1 | 0 | 1 | 0 |

Sources: [City crash archive](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512), [CHP CCRS](https://data.ca.gov/dataset/ccrs); `hour_summary.csv`. A category total is observed frequency, not exposure-adjusted risk. `ksi_crashes_known_crashes` is the number of rows with a known KSI flag.

## Weekday versus weekend, separated by source network

| analysis_network | is_weekend | total_crashes | ksi_crashes | ksi_crashes_known_crashes | fatalities |
| --- | --- | --- | --- | --- | --- |
| City-reported streets and county expressways | Weekday | 16792 | 801 | 16792 | 185 |
| City-reported streets and county expressways | Weekend | 7341 | 423 | 7341 | 80 |
| Reviewed CHP freeway subset | Weekday | 10670 | 231 | 10670 | 65 |
| Reviewed CHP freeway subset | Weekend | 3132 | 138 | 3132 | 41 |
| Reviewed CHP nonfreeway state-highway subset | Weekday | 31 | 0 | 31 | 0 |
| Reviewed CHP nonfreeway state-highway subset | Weekend | 11 | 0 | 11 | 0 |

Sources: [City crash archive](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512), [CHP CCRS](https://data.ca.gov/dataset/ccrs); `is_weekend_summary.csv`. A category total is observed frequency, not exposure-adjusted risk. `ksi_crashes_known_crashes` is the number of rows with a known KSI flag.

## Weekday rush hours, separated by source network

| analysis_network | rush_hour | total_crashes | ksi_crashes | ksi_crashes_known_crashes | fatalities |
| --- | --- | --- | --- | --- | --- |
| City-reported streets and county expressways | Outside defined weekday rush hours | 18281 | 979 | 18281 | 204 |
| City-reported streets and county expressways | Defined weekday rush hours | 5852 | 245 | 5852 | 61 |
| Reviewed CHP freeway subset | Outside defined weekday rush hours | 8884 | 309 | 8884 | 100 |
| Reviewed CHP freeway subset | Defined weekday rush hours | 4918 | 60 | 4918 | 6 |
| Reviewed CHP nonfreeway state-highway subset | Outside defined weekday rush hours | 27 | 0 | 27 | 0 |
| Reviewed CHP nonfreeway state-highway subset | Defined weekday rush hours | 15 | 0 | 15 | 0 |

Sources: [City crash archive](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512), [CHP CCRS](https://data.ca.gov/dataset/ccrs); `rush_hour_summary.csv`. A category total is observed frequency, not exposure-adjusted risk. `ksi_crashes_known_crashes` is the number of rows with a known KSI flag.

## Clock-defined daytime versus nighttime, separated by source network

| analysis_network | clock_night_18_06 | total_crashes | ksi_crashes | ksi_crashes_known_crashes | fatalities |
| --- | --- | --- | --- | --- | --- |
| City-reported streets and county expressways | 06:00–17:59 | 13681 | 544 | 13681 | 109 |
| City-reported streets and county expressways | 18:00–05:59 | 10452 | 680 | 10452 | 156 |
| Reviewed CHP freeway subset | 06:00–17:59 | 8873 | 133 | 8873 | 27 |
| Reviewed CHP freeway subset | 18:00–05:59 | 4929 | 236 | 4929 | 79 |
| Reviewed CHP nonfreeway state-highway subset | 06:00–17:59 | 28 | 0 | 28 | 0 |
| Reviewed CHP nonfreeway state-highway subset | 18:00–05:59 | 14 | 0 | 14 | 0 |

Sources: [City crash archive](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512), [CHP CCRS](https://data.ca.gov/dataset/ccrs); `clock_night_18_06_summary.csv`. A category total is observed frequency, not exposure-adjusted risk. `ksi_crashes_known_crashes` is the number of rows with a known KSI flag.

## Reported lighting, separated by source network

| analysis_network | lighting | total_crashes | ksi_crashes | ksi_crashes_known_crashes | fatalities |
| --- | --- | --- | --- | --- | --- |
| City-reported streets and county expressways | Dark - No Street Light | 327 | 39 | 327 | 13 |
| City-reported streets and county expressways | Dark - Street Light | 7581 | 575 | 7581 | 135 |
| City-reported streets and county expressways | Dark - Street Light Not Functioning | 81 | 8 | 81 | 4 |
| City-reported streets and county expressways | Daylight | 13096 | 547 | 13096 | 105 |
| City-reported streets and county expressways | Dusk - Dawn | 937 | 52 | 937 | 8 |
| City-reported streets and county expressways | Unknown | 2111 | 3 | 2111 | 0 |
| Reviewed CHP freeway subset | DARK-NO STREET LIGHTS | 2213 | 110 | 2213 | 35 |
| Reviewed CHP freeway subset | DARK-STREET LIGHTS | 2057 | 101 | 2057 | 36 |
| Reviewed CHP freeway subset | DARK-STREET LIGHTS NOT FUNCTIONING* | 68 | 8 | 68 | 5 |
| Reviewed CHP freeway subset | DAYLIGHT | 8903 | 139 | 8903 | 26 |
| Reviewed CHP freeway subset | DUSK-DAWN | 561 | 11 | 561 | 4 |
| Reviewed CHP nonfreeway state-highway subset | DARK-NO STREET LIGHTS | 9 | 0 | 9 | 0 |
| Reviewed CHP nonfreeway state-highway subset | DARK-STREET LIGHTS | 6 | 0 | 6 | 0 |
| Reviewed CHP nonfreeway state-highway subset | DAYLIGHT | 27 | 0 | 27 | 0 |

Sources: [City crash archive](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512), [CHP CCRS](https://data.ca.gov/dataset/ccrs); `lighting_summary.csv`. A category total is observed frequency, not exposure-adjusted risk. `ksi_crashes_known_crashes` is the number of rows with a known KSI flag.

## Reported weather, separated by source network

| analysis_network | weather | total_crashes | ksi_crashes | ksi_crashes_known_crashes | fatalities |
| --- | --- | --- | --- | --- | --- |
| City-reported streets and county expressways | Clear | 18886 | 1112 | 18886 | 241 |
| City-reported streets and county expressways | Cloudy | 1016 | 57 | 1016 | 14 |
| City-reported streets and county expressways | Fog | 31 | 4 | 31 | 0 |
| City-reported streets and county expressways | Other | 52 | 0 | 52 | 0 |
| City-reported streets and county expressways | Rain | 893 | 44 | 893 | 8 |
| City-reported streets and county expressways | Snow | 5 | 0 | 5 | 0 |
| City-reported streets and county expressways | Unknown | 3232 | 6 | 3232 | 2 |
| City-reported streets and county expressways | Wind | 18 | 1 | 18 | 0 |
| Reviewed CHP freeway subset | CLEAR | 11603 | 328 | 11603 | 94 |
| Reviewed CHP freeway subset | CLEAR; CLOUDY | 4 | 1 | 4 | 0 |
| Reviewed CHP freeway subset | CLEAR; WIND | 6 | 0 | 6 | 0 |
| Reviewed CHP freeway subset | CLOUDY | 1224 | 24 | 1224 | 7 |
| Reviewed CHP freeway subset | CLOUDY; FOG/VISIBILITY | 5 | 0 | 5 | 0 |
| Reviewed CHP freeway subset | CLOUDY; RAINING | 280 | 7 | 280 | 3 |
| Reviewed CHP freeway subset | CLOUDY; SMOKEY | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | CLOUDY; SNOWING | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | CLOUDY; WIND | 3 | 0 | 3 | 0 |
| Reviewed CHP freeway subset | FOG/VISIBILITY | 4 | 0 | 4 | 0 |
| Reviewed CHP freeway subset | HAILING | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | HAZY(SMOKE) | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | RAINING | 651 | 9 | 651 | 2 |
| Reviewed CHP freeway subset | RAINING; HAIL | 3 | 0 | 3 | 0 |
| Reviewed CHP freeway subset | RAINING; WIND | 3 | 0 | 3 | 0 |
| Reviewed CHP freeway subset | RAINING; hail | 2 | 0 | 2 | 0 |
| Reviewed CHP freeway subset | SMOKEY | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | SMOKY | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | SNOWING | 2 | 0 | 2 | 0 |
| Reviewed CHP freeway subset | WIND | 5 | 0 | 5 | 0 |
| Reviewed CHP freeway subset | hail | 1 | 0 | 1 | 0 |
| Reviewed CHP nonfreeway state-highway subset | CLEAR | 36 | 0 | 36 | 0 |
| Reviewed CHP nonfreeway state-highway subset | CLOUDY | 5 | 0 | 5 | 0 |
| Reviewed CHP nonfreeway state-highway subset | CLOUDY; RAINING | 1 | 0 | 1 | 0 |

Sources: [City crash archive](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512), [CHP CCRS](https://data.ca.gov/dataset/ccrs); `weather_summary.csv`. A category total is observed frequency, not exposure-adjusted risk. `ksi_crashes_known_crashes` is the number of rows with a known KSI flag.

## Reported road surface, separated by source network

| analysis_network | roadway_surface | total_crashes | ksi_crashes | ksi_crashes_known_crashes | fatalities |
| --- | --- | --- | --- | --- | --- |
| City-reported streets and county expressways | Dry | 19399 | 1150 | 19399 | 253 |
| City-reported streets and county expressways | Slippery (Muddy Oily etc.) | 32 | 1 | 32 | 0 |
| City-reported streets and county expressways | Snowy - Icy | 2 | 0 | 2 | 0 |
| City-reported streets and county expressways | Unknown | 3302 | 10 | 3302 | 2 |
| City-reported streets and county expressways | Wet | 1398 | 63 | 1398 | 10 |
| Reviewed CHP freeway subset | Dry | 12446 | 343 | 12446 | 96 |
| Reviewed CHP freeway subset | Slippery (muddy, oily, etc.) | 22 | 1 | 22 | 1 |
| Reviewed CHP freeway subset | Snowy or icy | 5 | 0 | 5 | 0 |
| Reviewed CHP freeway subset | Wet | 1329 | 25 | 1329 | 9 |
| Reviewed CHP nonfreeway state-highway subset | Dry | 40 | 0 | 40 | 0 |
| Reviewed CHP nonfreeway state-highway subset | Wet | 2 | 0 | 2 | 0 |

Sources: [City crash archive](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512), [CHP CCRS](https://data.ca.gov/dataset/ccrs); `roadway_surface_summary.csv`. A category total is observed frequency, not exposure-adjusted risk. `ksi_crashes_known_crashes` is the number of rows with a known KSI flag.

## Reported roadway condition, separated by source network

| analysis_network | roadway_condition | total_crashes | ksi_crashes | ksi_crashes_known_crashes | fatalities |
| --- | --- | --- | --- | --- | --- |
| City-reported streets and county expressways | Construction - Repair Zone | 113 | 2 | 113 | 0 |
| City-reported streets and county expressways | Flooded | 5 | 1 | 5 | 1 |
| City-reported streets and county expressways | Holes Deep Rut | 26 | 2 | 26 | 0 |
| City-reported streets and county expressways | Loose Material On Roadway | 31 | 4 | 31 | 2 |
| City-reported streets and county expressways | No Unusual Conditions | 20160 | 1181 | 20160 | 259 |
| City-reported streets and county expressways | Obstruction On Roadway | 37 | 1 | 37 | 1 |
| City-reported streets and county expressways | Other | 114 | 5 | 114 | 0 |
| City-reported streets and county expressways | Reduced Roadway Width | 20 | 2 | 20 | 1 |
| City-reported streets and county expressways | Unknown | 3627 | 26 | 3627 | 1 |
| Reviewed CHP freeway subset | CONSTRUCTION-REPAIR ZONE | 52 | 2 | 52 | 1 |
| Reviewed CHP freeway subset | CONSTRUCTION-REPAIR ZONE; FLOODED* | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | CONSTRUCTION-REPAIR ZONE; NO UNUSUAL CONDITIONS | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | CONSTRUCTION-REPAIR ZONE; OBSTRUCTION ON ROADWAY* | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | CONSTRUCTION-REPAIR ZONE; OTHER* - 3 RIGHT LANES CLOSED | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | CONSTRUCTION-REPAIR ZONE; OTHER* - LANE CLOSURE | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | CONSTRUCTION-REPAIR ZONE; REDUCED ROADWAY WIDTH | 23 | 0 | 23 | 0 |
| Reviewed CHP freeway subset | FLOODED* | 52 | 2 | 52 | 0 |
| Reviewed CHP freeway subset | FLOODED*; HOLES- DEEPRUT* | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | HOLES- DEEPRUT* | 23 | 0 | 23 | 0 |
| Reviewed CHP freeway subset | HOLES- DEEPRUT*; NO UNUSUAL CONDITIONS | 2 | 0 | 2 | 0 |
| Reviewed CHP freeway subset | LOOSE MATERIAL ON ROADWAY* | 4 | 0 | 4 | 0 |
| Reviewed CHP freeway subset | NO UNUSUAL CONDITIONS | 13528 | 360 | 13528 | 103 |
| Reviewed CHP freeway subset | NO UNUSUAL CONDITIONS; OBSTRUCTION ON ROADWAY* | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | NO UNUSUAL CONDITIONS; REDUCED ROADWAY WIDTH | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | OBSTRUCTION ON ROADWAY* | 93 | 5 | 93 | 2 |
| Reviewed CHP freeway subset | OTHER* - BLOCKING LANES | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | OTHER* - CONED EMERGENCY SCENE | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | OTHER* - CONES IN #1 LANE | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | OTHER* - DEBRIS | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | OTHER* - FLARE PATTERN | 2 | 0 | 2 | 0 |
| Reviewed CHP freeway subset | OTHER* - LANE CLOSURE | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | OTHER* - NO LANE LINES | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | OTHER* - POLICE ACTIVITY | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | OTHER* - SMOKE/FIRE | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | OTHER* - SWEEPING MAINTENANCE | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | OTHER* - VEHICLE ON RIGHT SHOULDER | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | OTHER* - ice/hail | 1 | 0 | 1 | 0 |
| Reviewed CHP freeway subset | REDUCED ROADWAY WIDTH | 4 | 0 | 4 | 0 |
| Reviewed CHP nonfreeway state-highway subset | NO UNUSUAL CONDITIONS | 40 | 0 | 40 | 0 |
| Reviewed CHP nonfreeway state-highway subset | NO UNUSUAL CONDITIONS - NO UNUSUAL CONDITIONS | 1 | 0 | 1 | 0 |
| Reviewed CHP nonfreeway state-highway subset | OBSTRUCTION ON ROADWAY* | 1 | 0 | 1 | 0 |

Sources: [City crash archive](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512), [CHP CCRS](https://data.ca.gov/dataset/ccrs); `roadway_condition_summary.csv`. A category total is observed frequency, not exposure-adjusted risk. `ksi_crashes_known_crashes` is the number of rows with a known KSI flag.

## Collision type, separated by source network

| analysis_network | collision_type | total_crashes | ksi_crashes | ksi_crashes_known_crashes | fatalities |
| --- | --- | --- | --- | --- | --- |
| City-reported streets and county expressways | Broadside | 4946 | 240 | 4946 | 33 |
| City-reported streets and county expressways | Head On | 1692 | 81 | 1692 | 8 |
| City-reported streets and county expressways | Hit Object | 2460 | 195 | 2460 | 51 |
| City-reported streets and county expressways | Other | 1183 | 20 | 1183 | 2 |
| City-reported streets and county expressways | Overturned | 78 | 6 | 78 | 0 |
| City-reported streets and county expressways | Rear End | 6063 | 88 | 6063 | 13 |
| City-reported streets and county expressways | Sideswipe | 4954 | 67 | 4954 | 8 |
| City-reported streets and county expressways | Vehicle/Bike | 1397 | 174 | 1397 | 32 |
| City-reported streets and county expressways | Vehicle/Pedestrian | 1360 | 353 | 1360 | 118 |
| Reviewed CHP freeway subset | BROADSIDE | 204 | 11 | 204 | 1 |
| Reviewed CHP freeway subset | HEAD-ON | 71 | 11 | 71 | 7 |
| Reviewed CHP freeway subset | HIT OBJECT | 2468 | 118 | 2468 | 37 |
| Reviewed CHP freeway subset | OTHER | 62 | 3 | 62 | 0 |
| Reviewed CHP freeway subset | OVERTURNED | 228 | 20 | 228 | 7 |
| Reviewed CHP freeway subset | REAR END | 7031 | 111 | 7031 | 15 |
| Reviewed CHP freeway subset | SIDE SWIPE | 3685 | 53 | 3685 | 7 |
| Reviewed CHP freeway subset | VEHICLE/PEDESTRAIN | 52 | 42 | 52 | 32 |
| Reviewed CHP freeway subset | Unknown | 1 | 0 | 1 | 0 |
| Reviewed CHP nonfreeway state-highway subset | BROADSIDE | 1 | 0 | 1 | 0 |
| Reviewed CHP nonfreeway state-highway subset | HIT OBJECT | 15 | 0 | 15 | 0 |
| Reviewed CHP nonfreeway state-highway subset | OVERTURNED | 2 | 0 | 2 | 0 |
| Reviewed CHP nonfreeway state-highway subset | REAR END | 16 | 0 | 16 | 0 |
| Reviewed CHP nonfreeway state-highway subset | SIDE SWIPE | 8 | 0 | 8 | 0 |

Sources: [City crash archive](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512), [CHP CCRS](https://data.ca.gov/dataset/ccrs); `collision_type_summary.csv`. A category total is observed frequency, not exposure-adjusted risk. `ksi_crashes_known_crashes` is the number of rows with a known KSI flag.

## Recorded factors and unknown coverage

| analysis_network | factor | total_crashes | ksi_crashes | known_crashes | unknown_crashes |
| --- | --- | --- | --- | --- | --- |
| City-reported streets and county expressways | speeding | 5725 | 339 | 17630 | 6503 |
| City-reported streets and county expressways | dui_intoxication_positive | 2155 | 179 | 2155 | 21978 |
| City-reported streets and county expressways | unsafe_turn_or_movement | 2594 | 96 | 17621 | 6512 |
| City-reported streets and county expressways | red_light_violation | 1982 | 125 | 17617 | 6516 |
| City-reported streets and county expressways | hit_and_run | 3903 | 130 | 3903 | 20230 |
| Reviewed CHP freeway subset | speeding | 7745 | 152 | 13400 | 402 |
| Reviewed CHP freeway subset | dui_intoxication_positive | 974 | 104 | 974 | 12828 |
| Reviewed CHP freeway subset | unsafe_turn_or_movement | 3602 | 141 | 13394 | 408 |
| Reviewed CHP freeway subset | red_light_violation | 4 | 0 | 13393 | 409 |
| Reviewed CHP freeway subset | hit_and_run | 3317 | 61 | 3317 | 10485 |
| Reviewed CHP nonfreeway state-highway subset | speeding | 18 | 0 | 39 | 3 |
| Reviewed CHP nonfreeway state-highway subset | dui_intoxication_positive | 5 | 0 | 5 | 37 |
| Reviewed CHP nonfreeway state-highway subset | unsafe_turn_or_movement | 16 | 0 | 39 | 3 |
| Reviewed CHP nonfreeway state-highway subset | red_light_violation | 0 | Unknown | 39 | 3 |
| Reviewed CHP nonfreeway state-highway subset | hit_and_run | 6 | 0 | 6 | 36 |

Sources: [City crash archive](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512), [CHP CCRS](https://data.ca.gov/dataset/ccrs); `cause_summary.csv`. `total_crashes` here means factor-positive crashes. Known plus unknown gives the full network denominator; factor categories overlap.

## Road-user involvement and validated person outcomes

| analysis_network | road_user | mode_involved_crashes | mode_involved_ksi_crashes | actual_mode_ksi_persons_reported | actual_mode_ksi_persons_known_crashes | crash_population | mode_flag_unknown_crashes |
| --- | --- | --- | --- | --- | --- | --- | --- |
| City-reported streets and county expressways | pedestrian | 1359 | 351 | 213 | 13865 | 24133 | 2721 |
| City-reported streets and county expressways | bicycle | 1262 | 158 | 85 | 13865 | 24133 | 2741 |
| City-reported streets and county expressways | motorcycle | 689 | 200 | 115 | 13865 | 24133 | 2818 |
| City-reported streets and county expressways | vehicle_occupant | 22360 | 1096 | 314 | 13865 | 24133 | 1618 |
| Reviewed CHP freeway subset | pedestrian | 69 | 47 | 49 | 13802 | 13802 | 0 |
| Reviewed CHP freeway subset | bicycle | 8 | 2 | 2 | 13802 | 13802 | 0 |
| Reviewed CHP freeway subset | motorcycle | 354 | 69 | 70 | 13802 | 13802 | 0 |
| Reviewed CHP freeway subset | vehicle_occupant | 13631 | 343 | 286 | 13802 | 13802 | 71 |
| Reviewed CHP nonfreeway state-highway subset | pedestrian | 0 | 0 | 0 | 42 | 42 | 0 |
| Reviewed CHP nonfreeway state-highway subset | bicycle | 0 | 0 | 0 | 42 | 42 | 0 |
| Reviewed CHP nonfreeway state-highway subset | motorcycle | 1 | 0 | 0 | 42 | 42 | 0 |
| Reviewed CHP nonfreeway state-highway subset | vehicle_occupant | 41 | 0 | 0 | 42 | 42 | 0 |

Sources: [City crash archive](https://geo.sanjoseca.gov/server/rest/services/OPN/OPN_OpenDataService/MapServer/512), [CHP CCRS](https://data.ca.gov/dataset/ccrs); `road_user_summary.csv`. A mode-involved KSI crash may injure a different road user. Actual mode-specific KSI people cover only crashes with validated person attribution; these are incomplete observed totals. Known-crash coverage and mode unknowns must accompany the values.

## Claims that are not publication-safe

Do not describe this as all crashes that occurred, a complete combined city/highway census, final2024 CHP/FARS data, a risk-per-driver ranking, proof that a road caused crashes, mode-specific KSI people based only on mode-involved crash counts, or an official City ranking. Do not add TIMS, FARS or OTS rows to the canonical table. Do not use the City rolling-layer counts interchangeably with its archive. Do not compare exposure rates across unmatched annual periods. See `qa_report.md`, `source_notes.md`, `methodology.md` and `exposure_analysis.md`.