What Is the Leading Cause of Traffic Fatalities in California?
Year after year, speeding and impaired driving are the leading factors in California traffic deaths, with distracted driving a fast-growing contributor. According to the California Office of Traffic Safety and NHTSA, these behaviors—along with not wearing seat belts—drive the majority of fatal crashes, and nearly all of them are preventable.

Speeding and impaired driving lead the list
Speeding reduces reaction time and multiplies crash forces, and it is a factor in a large share of fatal collisions. Alcohol- and drug-impaired driving remains one of the top killers on California roads. Both are willful behaviors—which is why crashes they cause often support strong liability and, in some cases, punitive claims.
Distracted driving is rising
Phone use—texting, scrolling, navigation—takes a driver’s eyes and attention off the road. At freeway speed, glancing at a phone for a few seconds means traveling the length of a football field blind. California law prohibits handheld phone use while driving.
What this means for injury claims
When a crash is caused by speeding, impairment, or illegal phone use, that conduct is powerful evidence of negligence. Citations, toll and phone records, and dashcam or event-data-recorder data help prove exactly what the at-fault driver was doing.
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Quick Reference
| Factor | Notes |
|---|---|
| Speeding | Reduces reaction time, multiplies crash forces |
| Impaired driving | Alcohol and drugs; a top killer |
| Distracted driving | Fast-growing; handheld phone use is illegal |
| Not wearing seat belts | Increases fatality risk in a crash |
Frequently Asked Questions
What causes the most traffic deaths in California?
Speeding and impaired (alcohol/drug) driving are consistently the leading factors, with distracted driving a rapidly growing contributor, according to the California Office of Traffic Safety and NHTSA.
Is distracted driving illegal in California?
Yes. California prohibits holding and using a phone while driving. Handheld phone use is a citable offense and strong evidence of negligence if it causes a crash.
How does the cause of a crash affect my claim?
When speeding, impairment, or illegal phone use caused the crash, that conduct is compelling evidence of negligence and can strengthen your claim—and sometimes support punitive damages.
Written & legally reviewed by Compass Law Group partners

Joseph Shirazi
Managing Partner, Compass Law Group, LLP
California State Bar #265403 · Loyola Law School, J.D.
Joseph Shirazi is the Managing Partner of Compass Law Group, LLP, leading the firm’s personal-injury, catastrophic-injury, and wrongful-death trial practice. He authored the analysis on this page.
Profiles: Avvo · Super Lawyers · Justia · LinkedIn · CA State Bar · Full Bio →

Simon Esfandi
Partner & Co-Founder, Compass Law Group, LLP
California State Bar #275307 · Loyola Law School, J.D.
Simon Esfandi is a Partner and Co-Founder of Compass Law Group, LLP. He reviewed this page for legal accuracy. Compass represents California injury victims on a No Win, No Fee basis.
Profiles: Avvo · Super Lawyers · Justia · LinkedIn · CA State Bar · Full Bio →
Past results do not guarantee future outcomes. This article is legal information, not legal advice.
Injured and not sure what your claim is worth?
Get a Free ConsultationNo Win, No Fee · (213) 320-1001



