I-10 Accidents in Arizona — The Deadliest Highway in the State

Interstate 10 is the deadliest highway in Arizona. Our analysis of the National Highway Traffic Safety Administration’s Fatality Analysis Reporting System (FARS) reveals 447 fatal crashes on I-10 between 2015 and 2022 — more than any other road in the state. That’s roughly one fatal crash every week for eight years.

I-10 by the Numbers

Here’s how I-10 compares to other Arizona highways:

• I-10: 447 fatal crashes — the deadliest by a wide margin
• US-60: 253 fatal crashes
• I-17: 209 fatal crashes
• I-40: 204 fatal crashes
• I-19: 72 fatal crashes
• SR-87: 68 fatal crashes

I-10 carries nearly twice as many fatal crashes as the next most dangerous road. And these are just the fatalities — the total number of injury and property-damage crashes is many times higher.

Why I-10 Is So Dangerous

Several factors converge to make I-10 uniquely dangerous in Arizona.

Speed and distance. I-10 runs 392 miles across Arizona — from the California border through Phoenix to Tucson and on to New Mexico. Much of it is long, straight desert highway where speeds of 75+ mph are common. At those speeds, any error — a tire blowout, a moment of inattention, a lane drift — becomes lethal.

Truck traffic. I-10 is a major commercial freight corridor connecting the ports of Los Angeles and Long Beach to the rest of the country. Heavy truck traffic means more large-vehicle crashes, longer stopping distances, and catastrophic weight mismatches when trucks collide with passenger vehicles. Truck accident cases on I-10 are among the most severe we handle.

Fatigue. The long, monotonous stretches between Phoenix and Tucson — and especially between Tucson and the New Mexico border — are notorious for drowsy driving. Fatigued drivers drift out of lanes, miss curves, and rear-end slower traffic. Commercial truck drivers face federal hours-of-service limits specifically because of this danger, but violations are common.

Heat. Arizona’s extreme summer temperatures punish both vehicles and drivers. Tire blowouts increase dramatically when road surface temperatures exceed 150°F. Overheating engines and blown radiators cause disabled vehicles on the shoulder — creating hazards for passing traffic. And heat stroke affects drivers’ judgment and reaction times.

Wrong-way drivers. Arizona has a well-documented wrong-way driver problem, and I-10 is one of the highways most affected. Wrong-way crashes are almost always head-on collisions at combined speeds of 130+ mph. They are among the most likely to be fatal.

The I-10/I-17 Stack Interchange

The interchange where I-10 and I-17 merge in central Phoenix — known as “The Stack” — is one of the most dangerous stretches of highway in the state. The complex weaving patterns, high traffic volumes, and short merge distances create a constant stream of sideswipe collisions, rear-end crashes, and multi-vehicle pileups. If you commute through The Stack, you already know.

When Fatal Crashes Happen on I-10

Our data shows that I-10 fatal crashes peak during late-night and early-morning hours (10 PM – 4 AM) when drowsy and impaired driving are most common, Friday and Saturday nights when DUI rates spike, holiday weekends — especially Memorial Day, Fourth of July, and Labor Day, and monsoon season when sudden storms reduce visibility and flood low-lying sections.

What to Do If You’re in an I-10 Crash

I-10 crashes present unique challenges. High speeds mean more severe injuries. The remote stretches between cities mean longer emergency response times. And the commercial truck involvement means complex multi-party liability.

If you’re in an I-10 crash, move to safety if possible — the shoulder of a high-speed highway is an extremely dangerous place to stand. Call 911. Document everything you can. And contact the Law Badgers as soon as possible.

We handle I-10 accident cases across the full length of the highway — from Buckeye to Casa Grande to Tucson and beyond. Our crash data analysis gives us insights into I-10 accident patterns that most firms simply don’t have.

Arizona’s Deadliest Roads — The Full Picture

I-10 leads, but the danger extends across Arizona’s highway system. Here are the top 10 deadliest roads from our FARS analysis (2015–2022):

1. I-10 — 447 fatal crashes
2. US-60 — 253 fatal crashes
3. I-17 — 209 fatal crashes
4. I-40 — 204 fatal crashes
5. SR-89 — 89 fatal crashes
6. I-19 — 72 fatal crashes
7. SR-87 — 68 fatal crashes
8. SR-95 — 63 fatal crashes
9. US-93 — 58 fatal crashes
10. SR-347 — 47 fatal crashes

If you or a loved one has been injured on any of these roads — or on any road in Arizona — the Law Badgers are here to fight for your recovery.