Smoke in the Cabin on I-70
At 2:15 p.m. you are returning from a middle-school activity trip on Interstate 70 with 22 students. You smell burning insulation, then see gray smoke curling from the dashboard. The bus still runs, but the shoulder is narrow, with a guardrail on the right and 70 mph traffic. You stop, set the parking brake, and turn off the engine. The front door opens, but smoke thickens near the stairwell. The rear emergency door opens freely. One student wears a walking boot and moves slowly; another is crying and refuses to move. The outside temperature is 95°F, and the nearest exit is a quarter mile back. Dispatch has not yet answered. You must decide whether to evacuate, which exit to use, and where to assemble.
1. Evacuate or keep students aboard? What drives the decision?
Read the worked answer
Smoke from the dashboard is an immediate evacuation trigger. I would not wait for dispatch, for a confirmed fire, or for the smoke to clear. Smoke can become fire, and the cabin air is already contaminated. I would stop the engine, set the brake, turn on hazard lights, and give a clear PA command: leave books and bags, move to the rear door, and stay quiet. The front stairwell is smoky, so the rear emergency door is the primary exit. I would send a responsible student to open and hold the rear door and help others down. The assembly point should be at least 100 feet from the bus, upwind and behind the guardrail if it is safe to cross. A quarter mile to the nearest exit is too far to drive a smoking bus.
2. How do you move the student with the walking boot and the crying student without blocking the aisle?
Read the worked answer
I would assign two calm students to walk beside the student in the boot, one on each side, and let that group start early so they are not trapped behind the crowd. I would not try to carry the student down the rear steps; that risks a fall. For the crying student, I would give a simple task, such as holding the door or counting students at the assembly point, because a job reduces panic. I would keep the aisle clear by telling students to leave backpacks behind. I would stand at the rear door and help students down, then do a seat-by-seat check. The driver should be the last person off, but not so late that the smoke traps anyone.
3. What do you do after the last student is off?
Read the worked answer
I would move the group at least 100 feet from the bus, upwind, and keep them together behind a barrier if one is available. I would do an immediate head count against the trip roster and ask student leaders to confirm who is missing. Then I would call 911, giving the interstate mile marker, direction, number of students, and the smoke condition. I would radio dispatch and request another bus and administrative support. No one reboards for phones or bags. I would check for injuries, start first aid, and keep students away from traffic. The bus stays where it is until responders clear it. I would write down times, names, and actions while they are fresh.