You are driving a loaded tractor-trailer at 55 mph on a dry road. About how many seconds of following distance should you keep from the vehicle ahead?

Question

Accepted Answer

At least 1 second for every 10 feet of vehicle length, plus 1 extra second at speeds over 40 mph

Answer

1 second for every 10 feet of vehicle length, no adjustment needed

Answer

A fixed 3 seconds regardless of vehicle length or speed

Answer

A fixed 8 seconds regardless of vehicle length or speed