Arizona's RAPID Act: No Daytime Speed Limits on Rural Highways? (2026)

Arizona's bold move to abolish daytime speed limits on select highways has sparked a heated debate. The proposed RAPID Act aims to revolutionize road safety, but is it a step too far?

Unleashing the Speed Limit

State Rep. Nick Kupper's vision is to create 'derestricted speed zones' on rural interstates, allowing drivers to push the pedal to the metal without any daytime speed restrictions. However, this proposal is not without its strict conditions.

The RAPID Act, or Reasonable and Prudent Interstate Driving Act, would only apply to specific stretches of rural interstate, outside urban areas with populations over 50,000, and only during daylight hours. At night, the speed limit would remain at a strict 80 mph.

But here's where it gets controversial: the Arizona Department of Transportation (ADOT) would have the authority to designate these zones, but only after rigorous safety assessments. Any eligible highway segment would need to meet high engineering and design standards, and demonstrate a crash rate below the state average.

And this is the part most people miss: the proposal also includes a key exemption for commercial vehicles, which must still adhere to the standard 80 mph limit, regardless of time or location.

A Case Study in Montana

Kupper cites Montana as proof that this concept can work safely. He argues that Montana's experience shows how modernizing speed laws can enhance safety when focused on driver behavior.

According to a legislative audit, Montana's removal of daytime speed limits led to a rise in average speeds, yet crash and fatality rates per vehicle mile traveled continued to decline, in line with neighboring states. The study's key takeaway was not about speed limits, but about driver habits and seatbelt use.

Kupper believes the RAPID Act acknowledges the differences between urban and rural driving conditions.

So, is Arizona's RAPID Act a progressive step towards safer highways, or a dangerous experiment? What do you think? Share your thoughts in the comments and let's discuss!

Arizona's RAPID Act: No Daytime Speed Limits on Rural Highways? (2026)
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