If you are driving a 40-foot vehicle at 25 mph, how much following distance should you allow?

4 seconds.. Section 2.7: Formula: 1 second per 10 feet. 40ft = 4 seconds. Since speed is under 40 mph, no extra second is added.

If you are driving a 40-foot vehicle at 25 mph, how much following distance should you allow?

ANSWER BREAKDOWN
  • A. Incorrect. 2 seconds is too short. The correct following distance is 4 seconds. Formula: 1 second per 10 feet. 40ft = 4 seconds. Since speed is under 40 mph, no extra second is added.
  • B. Incorrect. 3 seconds is too short. The correct following distance is 4 seconds. Formula: 1 second per 10 feet. 40ft = 4 seconds. Since speed is under 40 mph, no extra second is added.
  • C. Correct. Formula: 1 second per 10 feet. 40ft = 4 seconds. Since speed is under 40 mph, no extra second is added.
  • D. Incorrect. 5 seconds is more than necessary. The correct following distance is 4 seconds. Formula: 1 second per 10 feet. 40ft = 4 seconds. Since speed is under 40 mph, no extra second is added.