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

4 seconds. Section 2.7: Formula: 1 second for every 10 feet (3 seconds). Plus 1 second for speed over 40 mph. Total = 4 seconds.

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

ANSWER BREAKDOWN
  • A. Incorrect. 3 seconds is too short. The correct following distance is 4 seconds. Formula: 1 second for every 10 feet (3 seconds). Plus 1 second for speed over 40 mph. Total = 4 seconds.
  • B. Correct. Formula: 1 second for every 10 feet (3 seconds). Plus 1 second for speed over 40 mph. Total = 4 seconds.
  • C. Incorrect. 5 seconds is more than necessary. The correct following distance is 4 seconds. Formula: 1 second for every 10 feet (3 seconds). Plus 1 second for speed over 40 mph. Total = 4 seconds.
  • D. Incorrect. 6 seconds is more than necessary. The correct following distance is 4 seconds. Formula: 1 second for every 10 feet (3 seconds). Plus 1 second for speed over 40 mph. Total = 4 seconds.