Crash Data Tools and Resources

According to the latest data from the National Highway Traffic Safety Administration (NHTSA) in February, 2022, 31,720 people died nationwide in motor vehicle crashes from January 2021 through September 2021. This is roughly a 12% increase from the same time period in 2020, and the highest number of fatalities "during the first nine months of any year since 2006 and the highest percentage increase during the first nine months in the Fatality Analysis Reporting System’s history." The traffic safety data for people walking and biking is also concerning. The Governors Highway Safety Association (GHSA) May, 2021 report, "Pedestrian Traffic Fatalities by State: 2020 Preliminary Data" projects 6,721 pedestrian deaths in 2020, which is a 4.8% increase from the deaths reported by State Highway Safety Offices (SHSO) in 2019. For people biking, NHTSA reports that in 2019, there were 846 bicyclist fatalities, which accounted for 2.3% of all traffic fatalities for the year.

Accessing crash data plays an important role in assessing the safety needs and concerns for people walking and biking in our communities. Explore the tools and links below for accessing California crash data and statistics.

Transportation Injury Mapping System (TIMS)

The Transportation Injury Mapping System (TIMS) has been developed by UC Berkeley SafeTREC's GIS Program team to provide quick, easy and free access to California crash data that has been geo-coded to make it easy to map out crashes and even view the locations in Google Street View.

The following tools are currently available on TIMS:

  • NEW! SWITRS Summary
  • Weekly Crash Trends
  • SWITRS Query & Map
  • SWITRS GIS Map
  • California Safety PM Target Setting
  • Collision Diagram
  • SRTS Map Viewer
  • ATP Maps & Summary Data
  • Motorcycle Collision Map 
TOOL SNAPSHOT

SWITRS Summary

The SWITRS Statewide Summary is a tool for accessing and mapping statewide crash and injury data from the California Statewide Integrated Traffic Records System (SWITRS). The following data can be queried and viewed in tables:

  • Fatal and injury crashes (overall);
  • Fatalities and injuries (overall);
  • Fatalities and injuries to pedestrians, bicyclists, motorcyclists, older adults and unrestrained vehicle passengers; and
  • Fatalities and injuries related to alcohol, drugs, distracted driving, and speeding.

Users may query cities or counties, and may view 3 or 5 years of the most recent data available. Data is updated quarterly.

Screenshot of the statewide SWITRS summary table for statewide crash and injury data for CA counties from 2016-2020

Weekly Crash Trends

This dashboard features provisional weekly police-reported injury crashes on state highways in California. Data on the page is updated daily and can be used to monitor the frequency and type of crashes that occur in the weeks prior, during, and after California’s stay home order, which went into effect on March 19, 2020 in response to the COVID-19 pandemic.

 Police-reported injury crashes on state highways in California
SWITRS Query & Map

A basic tool for accessing fatal or injury collisions from the California Statewide Integrated Traffic Records System (SWITRS).
SWITRS query showing number of collisions by collision severity
SWITRS GIS Map

The SWITRS Geographic Information Systems (GIS) Map tool offers an interactive map with the capability of multiple tasks including Rank by Intersection, Collision Diagram, etc.
GIS map of Berkeley collisions in 2014

California Safety PM Target Setting Supporting Tool

The California Safety Performance Management (Safety PM) Target Setting Support Tool is based on FARS, SWITRS, and HPMS data.

Safety PM Target graphs for Berkeley

Collision Diagram

The Collision Diagram tool allows users to generate an interactive collision diagram. The Collision Diagram is accessible through SWITRS GIS Map.

Sample collision diagram
Safe Routes to School (SRTS) Map Viewer

The Safe Routes to School (SRTS) Map Viewer provides a pedestrian and bicycle collision map within a half mile radius of public schools in California.
Pedestrian and bicycle collision map around Berkeley High

ATP Maps & Summary Data

The ATP Maps & Summary Data tool utilizes multiple collision maps to find pedestrian and bicycle collision hot spots and generates data summaries within specified project and/or community limits.

Sample collision map

Motorcycle Collision Map

The Motorcycle Collision Map provides a simple means to explore motorcycle collisions in California by selected county and/or city.

Motorcycle collision map of Berkeley


To use the site, simply create an account and log in using the password that will be instantly emailed to your inbox. 

California Office of Traffic Safety (OTS)


OTS Crash Rankings

The California Office of Traffic Safety (OTS) Crash Rankings were developed so that individual cities could compare their city’s traffic safety statistics to those of other cities with similar-sized populations. Cities could use these comparisons to see what areas they may have problems in and which they were doing well in. The results helped both cities and OTS identify emerging or on-going traffic safety problem areas in order to help plan how to combat the problems and help with the possibility of facilitating grants. In recent years, media, researchers and the public have taken an interest in the OTS Rankings. It should be noted that OTS rankings are only indicators of potential problems; there are many factors that may either understate or overstate a city/county ranking that must be evaluated based on local circumstances.

OTS Data and Statistics Resources


California Strategic Highway Safety Plan (SHSP) Crash Data Dashboard

Caltrans has developed the California SHSP Crash Data Dashboard to provide SHSP implementers with direct access to crash data. The dashboard allows for filtering of the number and characteristics of fatal and serious injury crashes over the last 10 years. Some filtering options include:

  • SHSP Challenge AreaBar graph from the SHSP Crash Data Dashboard showing fatalities across California
  • Crash Severity
  • Location: District, County, Metropolitan Planning Organization (MPO), and City
  • Crash Cause
  • Crash Time
  • Crash Party and Victim Demographics

NEW: In the Spring 2022 SHSP E-Newsletter, Caltrans noted that in coordination with the Native American Advisory Committee (NAAC) and through geocoding efforts of University of California Berkeley SafeTREC, a filter was added to the tabs of the SHSP Crash Data Dashboard to allow all data to be filtered by whether a fatal or serious injury crash was within 5 miles of a tribal boundary.

Learn more about the Strategic Highway Safety Plan and the SHSP Crash Data Dashboard.