Tucson's I-19 Corridor: One of Arizona's Most Dangerous Highways

The stretch of Interstate 19 running south from Tucson to Nogales is one of Arizona’s most dangerous highways. Our NHTSA FARS analysis identified 72 fatal crashes on I-19 between 2015 and 2022 — making it one of the deadliest highways in the state relative to its length.

Why I-19 Is Deadly

Cross-border traffic. I-19 is the primary route between Tucson and the Mexican border at Nogales. It carries a mix of commercial trucks, commuters, and cross-border traffic that creates speed differentials and unpredictable driving patterns.

Truck traffic. Heavy commercial vehicles moving goods between the U.S. and Mexico dominate I-19. Given the heavy cross-border freight volume, truck-involved collisions are a serious risk on I-19, and the severity is extreme given the size differential.

Speed transitions. I-19 transitions from urban freeway in Tucson to rural highway heading south. Speed limits change, shoulders narrow, and lighting decreases. Drivers unfamiliar with the route can be caught off guard.

Wrong-way drivers. Like I-10 and I-17, I-19 sees regular wrong-way incidents, predominantly at night.

Unique metric system. I-19 is the only highway in the United States that uses metric distance markers (kilometers instead of miles). While this is a quirk, it can confuse drivers calculating distances and exit numbers, leading to last-second lane changes and missed exits.

Key Crash Zones

I-19/I-10 interchange (Tucson): The merge point where I-19 connects to I-10 is a high-crash area with complex traffic patterns.

Sahuarita/Green Valley: Retirement communities along I-19 generate slower traffic mixed with high-speed highway vehicles.

Tubac/Tumacacori: Rural segments with limited lighting and long distances between exits contribute to drowsy driving crashes, particularly at night.

If You’ve Been in an I-19 Crash

I-19 cases can involve multi-state issues (Mexican-plated vehicles, cross-border commercial carriers), complex trucking regulations, and longer emergency response times in rural segments.

The Law Badgers represent accident victims throughout southern Arizona. Call (833) DTF-IGHT for a free consultation.