Road User Behavior

California Traffic Safety Survey 2022: Speeding and Aggressive Driving Biggest Safety Concern

June 1, 2022

UC Berkeley SafeTREC is excited to release the 2022 California Traffic Safety Survey led by Ewald & Wasserman Research Consultants (E&W). This study was conducted on behalf of the California Office of Traffic Safety (OTS) and the Safe Transportation Research and Education Center (SafeTREC) at the University of California, Berkeley.

Speeding and Aggressive Driving Biggest Safety Concern

Speeding and aggressive driving was the biggest safety concern for California drivers (75.0% of surveyed...

California Traffic Safety Survey 2022

Ewald, Katrin
Wasserman, Lisa
2022

Ewald & Wasserman Research (E&W) conducted the 2022 California Traffic Safety Public Opinion Study on behalf of the California Office of Traffic Safety (OTS) and the Safe Transportation Research and Education Center of UC Berkeley (SafeTREC). Similar to previous years and since 2020, the data collection transitioned from an intercept survey to an online panel with survey panelists provided by Marketing Services Group, a commercial sample and panel vendor.

Panelists consisted of California drivers who were forwarded to an online survey portal programmed and managed by E&W...

Traffic safety crisis marked by spike in hit-and-run deaths

April 12, 2022

On March 31, 2022 SafeTREC Researcher Julia Griswold commented on the steady rise of hit-and-run deaths in the last 15 years as a share of traffic deaths in anPedestrian crosswalk button near an intersection article, "Traffic safety crisis marked by spike in hit-and-run deaths" with CNN Business journalist...

Tribal Transportation Safety Assessments (TTSA)

Tribal Transportation Safety Assessment (TTSA) State Planning Research (SPR)

Participants in Happy Camp safety assessment

UC Berkeley SafeTREC conducted Tribal Transportation Safety Assessments (TTSA) for seven (7) California Native American Tribes. The Tribal Transportation Safety Assessment (TTSA) - State Planning Research (SPR) was funded by the ...

New Release: 2021 SafeTREC Traffic Safety Fact Sheets

September 30, 2021
2021 SafeTREC Traffic Safety Fact Sheets feature recent data on some of California's most pressing traffic safety issues to help inform future road safety efforts

UC Berkeley SafeTREC is excited to announce the release of the 2021 series of Traffic Safety Fact Sheets, which feature traffic safety data and trends at the national and state level on a variety of road safety topics. This series also highlights the Safe System approach to road safety. Historically, road safety efforts focused on changing human behaviors to prevent crashes. The Safe System approach reframes...

2021 SafeTREC Traffic Safety Fact Sheet: Speeding-Related Crashes

Katherine L. Chen
Bor-Wen Tsai
Garrett Fortin
Jill F. Cooper
2021

A speeding-related crash is defined as one where a driver is speeding, racing, driving too fast for the conditions, or driving in excess of the posted speed limit. In the United States, in 2019, over one in four (26.3 percent) fatalities involved speeding, a proportion that has remained steady since 2017 following a decline in the prior decade. Speeding reduces a driver’s ability to steer safely around curves or objects, reduces the amount of time a driver has to react to a dangerous situation, and extends safe stopping distances.

Historically, road safety efforts focused on...

2021 SafeTREC Traffic Safety Fact Sheet: Occupant Protection

Katherine L. Chen
Bor-Wen Tsai
Garrett Fortin
Jill F. Cooper
2021

Restraint devices such as seat belts are a key element of motor vehicle occupant protection systems. Each year, NHTSA conducts the National Occupant Protection Use Survey (NOPUS) that measures, among many variables, the use of seat belts by occupants age eight and older. The 2019 NOPUS reported that seat belt use was 90.7 percent among front-seat passengers, a slight increase from the 89.6 percent observed in 2018. Additionally, the 2019 survey found that seat belt use increased during both weekday rush hours and non rush hours. Use during weekday rush hours increased from 89.3 percent in...

2021 SafeTREC Traffic Safety Fact Sheet: Motorcycle Safety

Katherine L. Chen
Bor-Wen Tsai
Garrett Fortin
Jill F. Cooper
2021

Crashes involving motorcycles are a major traffic safety concern in the United States. Since motorcyclists are susceptible to injury during crashes, they comprise a disproportionate share of all injured and killed vehicle occupants. In 2018, motorcyclists were 27 times more likely than passenger car occupants to be fatally injured in a traffic crash, per vehicle miles traveled. The primary countermeasures used to address this problem have included motorcycle helmet laws and other helmet-oriented programs, rider training and licensing programs, vehicle enhancements, including anti-lock...

2021 SafeTREC Traffic Safety Fact Sheet: Emergency Medical Services

Katherine L. Chen
Bor-Wen Tsai
Garrett Fortin
Jill F. Cooper
2021

There are typically many contributing factors in motor vehicle crashes. Emergency Medical Services (EMS) play a critical role post-crash to reduce fatalities and serious injuries. Recent studies show that an effective emergency trauma care system can improve survival from serious injuries by as much as 25 percent and county-level coordinated systems of trauma care can reduce crash fatalities rates as much as 50 percent.

The Haddon Matrix (see Figure 1) applies basic principles of public health to motor vehicle-related injuries. The matrix looks at the factors in the pre-crash, crash...

2021 SafeTREC Traffic Safety Fact Sheet: Alcohol-Impaired Driving

Katherine L. Chen
Bor-Wen Tsai
Garrett Fortin
Jill F. Cooper
2021

While alcohol-impaired driving fatalities have fallen significantly in the last three decades, NHTSA reports that alcohol-impaired driving still comprises a large percentage of traffic injuries and fatalities. On average in 2019, one person died from an alcohol-impaired driving crash every 52 minutes. There was a decrease in the number of alcohol-impaired driving fatalities and rate per 100 million Vehicle Miles Traveled (VMT) in the United States between 2018 and 2019.

Historically, road safety efforts focused on changing human behaviors to prevent crashes. The Safe System approach...