Key Takeaways
- Fridays account for 28 of the 112 deaths on I-15 in San Bernardino County since 2023, three times more than on a typical Tuesday. Together with Saturday and Sunday, the weekend accounts for 64% of the corridor’s deaths.
- 69% of those deaths happen on empty stretches. The Cajon Pass and the desert segments toward the Nevada line are where most of the fatal accidents happen.
- Unsafe speed causes nearly half of all I-15 crashes. Speed was the primary factor in 48% of crashes since 2023.
- The corridor is actually getting safer. Fatal and severe-injury crashes fell 47% since 2021 (181 to 96 in 2024) even though total crash volume stayed flat.
- One in five I-15 crashes involves a heavy truck. The freight and passenger mix through the Cajon Pass creates speed-differential conflict.
The Friday Problem
Drive along I-15 on a Tuesday from Ontario to the Nevada line. Statistically, it’s one of the safer days for this corridor. Only nine people have died here on a Tuesday since 2023.
Now, make it a Friday. Same road and distance. Would it surprise you to know that 28 have perished here? That’s three times as many.
We pulled every police-reported injury from I-15 accidents in San Bernardino County from the Transportation Injury Mapping System, UC Berkeley’s statewide crash database, between 2021 and 2025, for a total of roughly 4,800.
The data reveals exactly when and where this freeway is most dangerous—along with one surprising piece of good news.
Three Days, 64% of Deaths
I-15 deaths by day of week in San Bernardino County, 2023–2025.
Since 2023, Fridays through Sundays have seen the most deaths on the corridor, accounting for 72 of 112, or about 64%. The Vegas exodus may explain the Friday spike: high car volume, long distances, and impatient drivers, all at night. Sunday’s toll comes home with the return wave.
Location tells the same story. The incorporated stretches through Ontario, Rancho Cucamonga, and Fontana see plenty of crashes but few deaths. The unincorporated segments (Cajon Pass, the long desert run past Barstow toward the state line), meanwhile, produced 77 of the 112 deaths, or 69%. When the road empties and speeds climb, crashes turn fatal.
The Good News: Serious Crashes Nearly Reduced by Half Since 2021
Total injury crashes on the corridor barely moved, from 993 in 2021 to 985 in 2025. The freeway is as busy and as fender-bender-prone as ever.
But the accidents that kill are falling fast. Fatal and severe-injury crashes dropped from 181 in 2021 to 130 in 2023 and 96 in 2024. Deaths also fell from 64 during the 2022 peak to 35 in 2024.
I-15 in San Bernardino County: total injury crashes vs. fatal and severe-injury crashes.
Fewer crashes are catastrophic. Newer vehicle safety systems, targeted CHP enforcement, and post-pandemic traffic patterns likely all share credit. A crash on I-15 today is significantly less likely to kill you than it was three years ago—unless you are driving through the desert on a Friday night.
What Causes I-15 Crashes?
1. Unsafe speed
Speed is the main factor in 48% of crashes (roughly 1,400) since 2023. On downgrades like the Cajon Pass, California’s basic speed law means the safe speed is below the posted 70.
2. Improper turning and unsafe maneuvers
Improper turning, or sudden lane changes and overcorrections, caused 27% of corridor crashes, while 10% were due to unsafe lane changes. More than a third came from drivers moving sideways when they shouldn’t.
3. Impaired drivers
DUI accounted for about 9% of crashes since 2023. The share runs higher in the late-night hours that follow a weekend in Vegas.
4. Heavy trucks in the mix
One in five I-15 crashes involves a truck. The corridor is a primary freight route, and the speed differential between loaded trucks on grades and passenger traffic creates constant conflict, especially through the Cajon Pass.
How RMD Law Can Help After an I-15 Crash
1. Investigate a complex freeway collision
Multi-vehicle freeway crashes can produce conflicting accounts. We obtain the CHP report, dashcam and traffic camera footage, and witness statements before they scatter across three states.
2. Preserve electronic evidence
Trucks carry electronic control modules, and drivers have phones. Vehicle data showing speed and braking in the final seconds, which can be overwritten within weeks, often decides fault.
3. Handle out-of-state complications
Vegas corridor crashes may involve Nevada drivers, rental cars, and commercial policies from different states. We sort out which insurers owe what.
4. Take on trucking companies
Freight carriers can deploy rapid-response teams to serious crashes within hours. You need someone with the same urgency on your side.
5. Pursue full compensation
High-speed crashes cause life-changing injuries. We document current and future medical needs, lost income, and the full human cost before negotiating.
A Safer Road is Not a Safe Road
The numbers are moving the right way. Serious crashes have nearly halved, and 29 fewer families got the worst call imaginable in 2024 than in 2022. But 35 deaths is still not a safe corridor, and the data is blunt about the risk: Friday through Sunday evenings, in the open desert, at speed.
If you or a loved one has been injured in a crash on I-15, contact RMD Law today for a free consultation. Our experienced San Bernardino County car accident attorneys can investigate the crash, take on the insurers, and help you seek the compensation you may be entitled to. Contact RMD Law for guidance on freeway accident claims.
FAQs
By total deaths, yes. 112 fatalities were reported from 2023 through 2025, more than any other road. However, per crash, the fatality rate has decreased since 2022.
Friday, by a wide margin, followed by Saturday and Sunday. Those three days account for 64% of corridor deaths since 2023. Midday hours see the most crashes overall, but the deadliest ones happen on weekend evenings.
The unincorporated segments of the Cajon Pass between the valley and the high desert, and the desert run beyond Barstow. These have accounted for roughly 69% of deaths since 2023.
Treat it like any serious crash first: medical care, photos, and a CHP report. Then, get legal help early. Out-of-state drivers and insurers add procedural wrinkles, but California law generally governs a crash in California.
The data is from SWITRS, California’s statewide crash database, via UC Berkeley’s Transportation Injury Mapping System. The 2024 and 2025 figures are provisional; late-2025 fatality counts will rise as reports finalize.
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