header bg
8 arrow_forward 0 done arrow_forward 0 done_all

If you are driving a 30-foot vehicle at 55 mph, you should leave how many seconds of following distance?

The formula for following distance is one second per ten feet of vehicle, plus an extra second if you are traveling over 40 mph. Therefore, for a 30-foot vehicle traveling at 55 mph, you should leave a following distance of 4 seconds.