You are driving a 40-foot vehicle at 55 mph. The road is dry, and visibility is good.What is the least amount of space that you need to have in front of your vehicle?

Answer

The correct answer is A: 5 seconds

The minimum safe following distance when driving is one second per ten feet of vehicle length, plus an additional second if traveling over 40 mph. Therefore, a 40-foot vehicle traveling 55 mph would require a minimum following distance of five seconds.