At speeds below 40 mph, what is the recommended following distance rule for a commercial vehicle?
a.1 second for every 5 feet of vehicle length
b.1 second for every 10 feet of vehicle length
c.2 seconds for every 10 feet of vehicle length
d.A flat 4 seconds regardless of vehicle length
Explanation
At speeds below 40 mph, you should maintain at least 1 second of following distance for every 10 feet of vehicle length. For example, a 60-foot vehicle should maintain at least 6 seconds of following distance.