What must a driver do when passing a streetcar that is stopping to let off passengers?

Answer: B — Stop and proceed only after the streetcar doors are closed and clear of pedestrians

When a driver approaches a streetcar that is stopping to let off passengers, the correct action is to stop and proceed only after the streetcar doors are closed and it is clear of any pedestrians. This requirement is in place to ensure the safety of passengers who may be getting on or off the streetcar. The rules are designed to protect vulnerable individuals, particularly in urban settings where pedestrians may be present, and to reduce the risk of accidents. Stopping before passing the streetcar allows drivers to observe any passengers who may be unexpectedly stepping into the roadway, creating a safer environment for everyone involved. It is also a legal obligation in many jurisdictions to yield to pedestrians in such situations, reinforcing the responsibility of drivers to prioritize safety over speed. Options that suggest accelerating past the streetcar or passing at high speed disregard the potential dangers associated with pedestrians in motion, while honking unnecessarily might startle passengers rather than assist them in making safe decisions. Therefore, the emphasis on stopping and waiting is crucial for the safety and well-being of all road users.