Traffic Collisions in Contra Costa County

2014 – 2025
201420152016201720182019202020212022202320242025
44,489
Collisions
921
People killed
59,616
People injured
39%
On state highways

Between 2014 and 2025, 44,489 collisions were reported to the CHP in Contra Costa County. They killed 921 people and injured 59,616. Annual collisions have risen 12% since 2014 — against the statewide trend. The single most common time for a crash here is 5 PM on a Tuesday.

Collisions by year

2014 3,234
2015 3,767
2016 3,997
2017 4,107
2018 4,321
2019 4,422
2020 3,018
2021 3,269
2022 3,531
2023 3,416
2024 3,783
2025 3,624

When crashes happen

12 AM6 AM12 PM6 PM11 PM
Sunday 6,368
Monday 6,601
Tuesday 6,853
Wednesday 6,841
Thursday 6,819
Friday 5,917
Saturday 5,090

Roads With the Most Collisions

Freeways

  1. SR-45,279
  2. I-6804,484
  3. I-803,348
  4. SR-241,669
  5. SR-242759
  6. I-580674
  7. Port Chicago Hwy201
  8. Byron Highway145

City Streets

  1. Willow Pass Rd826
  2. Clayton Rd705
  3. Ygnacio Valley Rd702
  4. San Pablo Ave647
  5. Lone Tree Way481
  6. Treat Blvd481
  7. San Pablo Dam Rd457
  8. Monument Blvd421

Intersections With the Most Collisions

Involving a freeway

  1. Bailey Rd & SR-4448
  2. SR-4 & Willow Pass Rd393
  3. Railroad Ave & SR-4295
  4. El Portal Dr & I-80294
  5. I-680 & Monument Blvd290
  6. I-80 & Pinole Valley Rd285
  7. I-680 & SR-4274
  8. I-80 & San Pablo Dam Rd252

City streets only

  1. Camino Diablo & Vasco Rd143
  2. Oak Grove Rd & Ygnacio Valley Rd116
  3. Bailey Rd & Canal Rd94
  4. Concord Ave & Market St77
  5. Hess Rd & Kirker Pass Rd76
  6. Oak Grove Rd & Treat Blvd61
  7. Clayton Rd & Galindo St60
  8. 22nd St & Barrett Ave59

Driving in Contra Costa County?

Compare your route against every one of these 44,489 collisions and take the one with the fewest.

Plan a safer route

Source: California Highway Patrol Statewide Integrated Traffic Records System (SWITRS), via the Transportation Injury Mapping System at UC Berkeley. Figures cover collisions reported to the CHP; minor crashes that were never reported do not appear. Road and intersection names are as recorded by the reporting officer.