Thanksgiving Travel Risks: California Highways with the Most Holiday Accidents

Thanksgiving weekend is one of the busiest and most dangerous travel times of the year. At Dunnion Law, we’ve seen how holiday road trips can turn tragic in an instant, especially across California’s most heavily traveled highways. Between heavy traffic, long-distance travel, alcohol use and driver fatigue, accidents during Thanksgiving spike across the state every year.

While millions of Californians hit the road to visit family, certain highways consistently see higher crash rates during this season. Understanding where and why these accidents happen can help you make safer choices before your next holiday drive.

Why Thanksgiving Travel Is So Risky

According to state traffic data, the days around Thanksgiving see a rise in crashes involving alcohol, speeding and distracted driving. Many of these accidents occur on the Friday and Saturday following Thanksgiving, times when travelers are either heading home or celebrating the long weekend.

Even though the total number of vehicles on the road may decrease slightly, crash severity increases. Fewer cars don’t necessarily mean safer roads; it often means higher speeds and less caution, and a trucking accident can lead to catastrophic injury. Alcohol use, late-night driving and fatigue also play major roles in fatal Thanksgiving crashes.

California’s Most Dangerous Counties During the Holiday Season

Based on statewide data, five counties (Los Angeles, San Diego, Orange, Riverside and San Bernardino) consistently record the highest number of holiday crashes and fatalities.

  • Los Angeles County leads in total traffic-related fatalities during Thanksgiving weekend. Even when overall crash numbers drop, deaths and serious injuries spike. Alcohol-impaired driving remains a major factor, often compounded by congestion on major freeways like I-5 and I-605.
  • San Bernardino County and Riverside County also see increased risks along stretches of I-15, one of the most dangerous highways during the holiday travel period. Heavy truck traffic, high speeds, and drivers heading to or from vacation destinations make this route especially treacherous.
  • San Diego County shows a similar pattern, with an increase in crashes involving injuries and alcohol during the Thanksgiving period. Even as total crashes dip, DUI-related collisions rise.

These regions represent California’s largest population centers, but their highways are major corridors for out-of-town travelers, a mix that increases accident risks.

The Deadliest California Highways During Thanksgiving

Certain routes in California consistently rank among the nation’s most dangerous during the Thanksgiving holiday. Among them:

  • I-15 in San Bernardino County
  • I-15 in Riverside County
  • I-5 and I-605 in Los Angeles County
  • I-8 in Imperial County

These highways see a surge of travelers heading between major cities and vacation spots, often in poor weather or heavy traffic. Combined with alcohol use and fatigue, these factors make long stretches of open highway deceptively dangerous.

Even with advances in vehicle safety, these roads continue to pose serious risks when drivers underestimate how quickly conditions can change.

How Alcohol and Speeding Factor In

Alcohol remains one of the top contributors to fatal holiday crashes. More than one-third of deadly accidents on Thanksgiving involve impaired drivers. While rideshare options have reduced some of these incidents, many still choose to drive after drinking, often late at night when visibility and alertness are already reduced.

Speeding is another key factor. Open stretches of highway invite drivers to push limits, especially when traffic thins out. But higher speeds increase both the likelihood of losing control and the severity of crashes when they occur.

Weather, Fatigue, and Distraction

Holiday travel in November often means unpredictable weather. Rain, fog or colder temperatures can make California highways slick and visibility poor. Combined with exhaustion from long drives or late-night returns, these conditions create a perfect storm for collisions.

Distraction is also a major issue. Many crashes stem from drivers checking their phones, adjusting navigation, or eating behind the wheel — all common behaviors during road trips. Even a brief lapse in attention can have devastating consequences when traveling at highway speeds.

Safety Tips for Thanksgiving Travelers

You can’t control the actions of other drivers, but you can take steps to reduce your own risk:

  • Keep your vehicle road-ready. Check your tires, lights, wipers and fluid levels before heading out.
  • Plan ahead. Give yourself extra time for traffic and weather delays.
  • Avoid peak hours. If possible, travel early in the morning or late at night when roads are less congested.
  • Don’t drive drowsy. Take breaks, switch drivers or plan overnight stops.
  • Stay alert in rural areas. Many serious crashes occur on long, open stretches outside major cities.
  • Never drink and drive. Arrange a designated driver, use public transportation or book a rideshare before your celebration begins.

The Bigger Picture

California remains one of the nation’s most dangerous states for holiday travel. Despite fewer cars on the road during Thanksgiving weekend, the combination of alcohol, fatigue, and high-speed driving leads to an increase in severe injuries and fatalities.

At Dunnion Law, we’ve represented countless families whose holidays turned tragic because another driver made a reckless decision. Understanding these risks — and driving defensively — is the best way to protect yourself and your loved ones.

Even if you’re prepared and following road laws, reckless drivers around you can cause an accident. If you or a loved one is injured in a crash during the holiday season, you don’t have to face the aftermath alone. Our personal injury lawyers have been protecting injured Californians in the Fresno and Monterey areas for 50 years and know how to hold negligent drivers accountable. Contact us to discuss your case and get the support you need to move forward.