Arizona Truck Speed Limit
No split in Arizona. Trucks run 75 on rural interstates like cars (A.R.S. 28-701). The catch is criminal speed: more than 20 mph over the posted limit is a class 3 misdemeanor (A.R.S. 28-701.02), and the line moves with the sign. On a 75 mph interstate it sits at 96, but on a 55 mph two-lane it drops to 76. Arizona dropped the old flat 85 mph trigger.
How fast a truck can run in Arizona
No split in Arizona. Trucks run 75 on rural interstates like cars (A.R.S. 28-701). The catch is criminal speed: more than 20 mph over the posted limit is a class 3 misdemeanor (A.R.S. 28-701.02), and the line moves with the sign. On a 75 mph interstate it sits at 96, but on a 55 mph two-lane it drops to 76. Arizona dropped the old flat 85 mph trigger.
Truck-specific rules and quirks
- Arizona runs 75 on rural interstates statewide with no truck split, but treats extreme speed as a crime: more than 20 mph over the posted limit anywhere is a class 3 misdemeanor (A.R.S. 28-701.02). The trigger moves with the sign, so on a 55 mph two-lane it lands at 76.
What a speeding ticket costs
Arizona criminalizes extreme speed. More than 20 mph over the posted limit anywhere, more than 20 over in a business or residential district (or over 45 mph where nothing is posted), or more than 35 mph approaching a school crossing is a class 3 misdemeanor (A.R.S. 28-701.02), not a simple ticket.
Arizona Truck Speed Limit FAQ
What is the truck speed limit in Arizona?
Do trucks have a lower speed limit than cars in Arizona?
What is the speeding penalty for a truck in Arizona?
Reference information for planning, not legal advice. Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it. Last reviewed July 2026. Source: https://www.iihs.org/topics/speed/speed-limit-laws. See our Terms & Disclaimer.
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