PA CDL School Bus Test study materials
PA CDL School Bus Test study resources

Dashboard Fire on a Divided Highway

PA CDL School Bus Test · Put your knowledge to work in context.

All case studies

Dashboard Fire on a Divided Highway

At 2:40 p.m. you are driving a 72-passenger bus on a four-lane divided highway with 44 seventh-grade students returning from a museum. You smell burning insulation and see smoke coming from under the dashboard. The bus is in the right lane, and traffic is heavy in both directions. You stop on the right shoulder, shut off the engine, and set the parking brake. The smoke thickens. One student uses crutches and is seated in the middle; the rear emergency door is clear, and the side door opens. The fire extinguisher is mounted by the driver's seat. A guardrail runs along the shoulder, and the nearest mile marker is 142. You must decide whether to evacuate, where to put the students, and how to handle the student on crutches and the extinguisher.

1. What are your immediate actions, and how do you evacuate the students?

Read the worked answer

Treat the smoke as a fire and evacuate. Stop on the shoulder, shut off the engine, set the parking brake, and put the bus in park. Do not open the hood; more air can feed a fire. Tell students in a calm, loud voice to leave their belongings and use the side door and rear emergency door. Stand where you can see both exits and the traffic.

Move the students upwind and away from the bus, behind the guardrail if it is safe, and at least 100 feet from the vehicle. Keep them together; do not let them cross the highway or walk along the travel lanes. Send a reliable student or staff member to call 911 if you cannot, and give mile marker 142 and the direction of travel.

2. Where should the students assemble, and how do you account for everyone, including the student on crutches?

Read the worked answer

Choose an assembly point that is upwind, away from traffic, and clear of the bus and any fuel spill. The guardrail side is better than the median if students can stand safely behind it; the median exposes them to traffic from both directions.

Count the students as they leave and count again at the assembly point. Use your seating chart or trip list to identify who is missing. Help the student on crutches down the steps or to the rear exit without blocking others; assign one student to carry the crutches once that student is clear. Do not send students back to the bus. If someone is missing, tell arriving firefighters or police; do not re-enter the bus yourself for a search unless you can do so without risk and you know exactly where the student was seated.

3. Should you use the fire extinguisher or open the engine cover? Explain the limits.

Read the worked answer

Use the extinguisher only if the fire is small, you have a clear escape path, and you have already started evacuation. Aim at the base of the fire from upwind, and do not stay if the smoke thickens or the fire spreads. Never open the engine cover fully; a sudden supply of air can make a fire flare.

The priority is getting 44 students off and accounted for. Once they are clear, keep the extinguisher available for a small fire but leave the firefighting to trained responders. Report what you saw, including smoke color, location, and smell, to the fire department and your dispatcher.