Keywords 55 mph, speed limit, National Speed Limit Act, safety, fuel conservation, accidents, driving behavior, enforcement, energy crisis, public health More for You Markets plummet as Trump rips ...

After an independent study and public input, the Arizona Department of Transportation announced on Tuesday that the speed limit on the highway would be raised from 55 mph to 65 mph south of Peoria ...

Many people believe driving 5 or 10 mph over the posted speed limit is harmless ... So, if you’re traveling 55 mph, you should be at least five car lengths behind the vehicle ahead of you.