Final answer:
A motorist must stop and become stationary at a railroad crossing when there are flashing lights or ringing bells.
Step-by-step explanation:
AT A RAILROAD CROSSING, WHEN THERE ARE FLASHING LIGHTS OR RINGING BELLS, A MOTORIST MUST:
- Stop moving and become stationary till it passes by.
When a motorist approaches a railroad crossing with flashing lights or ringing bells, it is crucial to stop and remain stationary until the train passes by. This ensures the safety of both the motorist and the passengers on the train. Ignoring the flashing lights or ringing bells is not only illegal but also extremely dangerous.