Home › CDL Practice Tests › General Knowledge Questions › Question 22
At speeds below 40 mph, how much following distance should you keep?
- A.One second for every 20 feet of vehicle length
- B.One second for every 10 feet of vehicle length, with a minimum of about 4 seconds for a typical combination vehicle
- C.Two seconds total, regardless of vehicle size
- D.Half a second per axle
Correct answer
B. One second for every 10 feet of vehicle length, with a minimum of about 4 seconds for a typical combination vehicle
Why
The standard rule below 40 mph is one second of following distance for each 10 feet of vehicle length. A 60-foot outfit therefore needs about six seconds, far more than the two-second habit carried over from driving a car.
Manual topic: Safe Driving - Managing Space · From the General Knowledge practice bank (GK-022).