How long does it take for a typical tractor-trailer unit to clear a double railroad track?

15 seconds. Section 2.15: It takes about 14 seconds to clear a single track and more than 15 seconds to clear a double track.

How long does it take for a typical tractor-trailer unit to clear a double railroad track?

ANSWER BREAKDOWN
  • A. Incorrect. 7 seconds is too short. The correct following distance is 15 seconds. It takes about 14 seconds to clear a single track and more than 15 seconds to clear a double track.
  • B. Incorrect. 10 seconds is too short. The correct following distance is 15 seconds. It takes about 14 seconds to clear a single track and more than 15 seconds to clear a double track.
  • C. Incorrect. 14 seconds is too short. The correct following distance is 15 seconds. It takes about 14 seconds to clear a single track and more than 15 seconds to clear a double track.
  • D. Correct. It takes about 14 seconds to clear a single track and more than 15 seconds to clear a double track.