Changing Ohio's speed limits isn't as simple as a phone call. Learn why a formal study is required and how it impacts road ...

From the days of horse and carriage, speed limit science (speed science) has been used to help establish speed limits on how fast (or slow) people and their vehicles should go. I’ve spent years ...

If you’ve ever been on a road where the speed limit feels artificially low or surprisingly high, you’re not alone. For decades, many states have leaned on a single formula to decide how fast cars ...

Observant motorists may notice a curious trend on U.S. roads: Driving on highways is getting faster while city speeds are getting slower. In denser, more residential areas, an increasing number of ...

Arizona lawmakers are considering eliminating rural highway speed limits — here’s why the proposal is gaining traction. Arizona considers allowing daytime, no-speed-limit zones on certain rural ...