If you are driving a vehicle requiring placards, you must stop at railroad crossings.

True.. Section 2.15: Vehicles carrying hazardous materials that require placards must stop at all railroad crossings.

If you are driving a vehicle requiring placards, you must stop at railroad crossings.

ANSWER BREAKDOWN
  • A. Correct. Vehicles carrying hazardous materials that require placards must stop at all railroad crossings.
  • B. Incorrect. "False." is not correct. Vehicles carrying hazardous materials that require placards must stop at all railroad crossings.
  • C. Incorrect. "Only if a train is coming." is not correct. Vehicles carrying hazardous materials that require placards must stop at all railroad crossings.
  • D. Incorrect. "Only at night." is not correct. Vehicles carrying hazardous materials that require placards must stop at all railroad crossings.