Speed limits are a subject of constant discussion across America, and because of decentralized state regulation over the limits, there can be a wide variance in limits from state to state. Arizona, ...

The speed limit on Interstate 70 in the high country will now change based on driving conditions thanks to newly installed electronic signage.

New digital speed limit signs are already active on some roads, changing the limit depending on numerous factors. Texas introduces variable speed limits using digital signs after a deadly 2021 pileup.

SIOUX FALLS, S.D. (KELO) — Drivers may not realize it but there are sensors on a section of Interstate 29 that could tell them to slow down under certain road conditions. The sensors are part of a ...