Road User Behavior

2018 National DUI Summer Mobilization August 17 - September 3

August 15, 2018
Drive Sober or Get Pulled Over
DUI Doesn't Just Mean Booze Facts

Driving under the influence of alcohol is a serious safety issue. According to the California Office of Traffic Safety (OTS), one person every 50 minutes was killed in an alcohol-involved crash nationwide in 2016. In California, 1,059 people lost their lives that year due to crashes involving a drunk driver.

Drug-impaired driving is also a...

A behavioral modeling approach to bicycle level of service

Griswold, Julia B.
Yu, Mengqiao
Victoria Filingeri
Grembek, Offer
Joan Walker

Bicycle level of service (LOS) measures are essential tools for transportation agencies to monitor and prioritize improvements to infrastructure for cyclists. While it is apparent that different types of cyclists have varying preferences for the facilities on which they ride, in current research and practice, measures are used that are either insufficiently quantitative and empirical or lack cyclist segmentation. In this study, we conducted a detailed survey on cyclist habits, preferences, and user experience, capturing responses to videos of a bicycle traveling on road segments in the San...

2017 SWITRS Data Added to Transportation Injury Mapping System

March 21, 2018

The Transportation Injury Mapping System (TIMS) has been updated with 2017 SWITRS data!

ATP Hex Map graphic

Community Hex Map generated in ATP Maps & Summary Data tool

The Transportation Injury Mapping System (TIMS) has been developed by 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 via a variety of...

April is National Distracted Driving Awareness Month

March 7, 2018
April is Distracted Driving Awareness Month

Distracted driving is deadly and dangerous. In 2015 alone, 3,477 people were killed and 391,000 people were injured in motor vehicle crashes involvingU Drive Campaign distracted drivers. In an effort to raise awareness on the consequences of texting and driving, and how to prevent this dangerous behavior, the National Highway Traffic Safety Administration (NHTSA) will be launching...

Visualizing Teen Driver Safety Needs: SafeTREC researchers present at 2017 GIS Day

November 10, 2017

Teen Heat Map Presentation

State Superintendent of Public Instruction, Tom Torlakson, with staff from the California Department of Education, California Office of Traffic Safety and SafeTREC.

On November 2, 2017, SafeTREC co-director Jill Cooper and researchers SangHyouk Oum and Liwei Fu presented SafeTREC’s latest data and mapping analysis tool, the Teen Safety Heat Map at the 2017 Geographic Information Systems...

SafeTREC's CA Teen Driver Heat Map featured in CDE Driver Education Update

January 26, 2018

The California Young Driver Heat Map (Teen Safety Heat Map), a new geographic information system (GIS) resource developed by SafeTREC in partnership with the California Office of Traffic Safety (OTS) was recently highlighted in the Winter, 2017-2018 issue of the California Department of Education's CDE Driver Education Update. Teen Safety Heat Map Article

This data and mapping analysis tool was developed...

New Campaign from Traffic Safety and Law Enforcement Launches: DUI Doesn't Mean Just Booze

December 29, 2017

Drug impaired driving is a problem on California highways. This includes drivers under the influence of prescribed medications, illicit drugs, over-the-counter medications or marijuana. And just like drunk driving, driving under the influence of drugs is illegal.

It is also dangerous and poses a threat to the driver, vehicle passengers, and other users on the road. Nearly one in four weekend...

National Teen Driver Safety Week October 15 - 21

October 16, 2017

Did you know that car crashes are the leading cause of death for teenagers, ahead of all other types of injury, disease, or violence? To shed light on this epidemic and reduce the number of lives lost, National Teen Driver Safety Week will be held this week from October 15 - 21.

NHTSA Teen Driver Safety GraphicThe National Highway Traffic Safety Administration (NHTSA) reports that nationwide in...

Geocoding Police Collision Report Data from California: A Comprehensive Approach

Bigham, John M.
Rice, Thomas M.
Pande, Swati
Lee, Junhak
Park, Shin Hyoung
Gutierrez, Nicolas
Ragland, David R.


Collision geocoding is the process of assigning geographic descriptors, usually latitude and longitude coordinates, to a traffic collision record. On California police reports, relative collision location is recorded using a highway postmile marker or a street intersection. The objective of this study was to create a geocoded database of all police-reported, fatal and severe injury collisions in the California Statewide Integrated Traffic Records System (SWITRS) for years 1997-2006 for use by public agencies.


Geocoding was completed with a multi-step...