What areas should a bus driver continue scanning while the bus is moving?
Correct answer: A – The bus interior and the roadway ahead, beside, and behind the bus
A bus driver must maintain awareness both inside and outside the vehicle. The scan should include the passenger area, the road ahead, both sides, and the area behind the bus. Monitoring passengers allows the driver to notice unsafe conduct, while the external scan provides the information needed to respond to traffic and roadway hazards.
Source: Washington State Commercial Driver Guide — § 4.3.1, “Passenger Supervision”.

