Final answer:
When a bus has stopped on a road with fewer than four lanes, drivers must stop and become stationary until the bus passes by.
Step-by-step explanation:
When a bus has stopped on a road with fewer than four lanes, drivers approaching the bus from either direction must stop moving and become stationary until the bus passes by. This is to ensure the safety of the passengers exiting or entering the bus. It is important for drivers to always be aware of school buses and follow traffic rules to prevent accidents.