When a bus driver obeys a stop sign and stops before a level crossing, he is also obliged:
- To use the horn and turn off the radio.
- Correct answer: To open the front door.
- To open the rear door to enable passenger escape.
- To wait until at least one train passes.
Why this is the answer
The correct answer in the official bank: To open the front door.
A bus driver who stops before a level crossing because of a "stop" sign must also open the front door. This is a duty in addition to the stop itself. Waiting for a train, using the horn, turning off the radio and opening a rear door are not the duty set for such a case.