Tire Blowout, Smoke, and 30 Passengers on an Urban Arterial
At 3:45 p.m. you are driving a 35-foot transit bus on a three-lane urban arterial with a 35 mph limit and heavy traffic. Thirty passengers are aboard, including four children under 10 and an elderly man with a cane. Without warning, the right rear inner dual blows out. The bus pulls hard right; you bring it to a stop partly on the right shoulder, with the right rear wheels over a storm drain grate. Within 20 seconds there is a burning-rubber smell and gray smoke curling up beside the rear door. Passengers begin shouting and crowding toward the front. The front door opens onto a three-foot sidewalk with a glass bus shelter; the rear door sits directly over the smoke. Traffic is still moving past on your left at speed. The fire extinguisher is in a bracket beside your seat and your phone is in the console. You have not yet counted the passengers.
1. What are your actions in the first 60 seconds, and how do you decide whether to evacuate?
Read the worked answer
Smoke means evacuate; you diagnose afterward.
- Stop, set the parking brake, shut the engine down, and turn on the hazard flashers. Shutting down kills the electrical source if the problem turns out to be wiring, and it stops the damaged tire from being driven.
- The burning-rubber smell and smoke at the rear door point to the tire against the storm drain grate or a dragging brake. That is the likeliest cause, but likeliest is not certain, and smoke inside a bus with 30 people is not something to investigate first.
- Get them off, then look. A small wheel-well fire can reach a fuel line or luggage bay faster than you can unload 30 people.
- If there were no smoke, no flame, and only a flat tire, keeping everyone aboard while you call for service would be reasonable. This is not that case.
- The extinguisher is for a small fire you can reach with an exit at your back, not for a fire between you and the passengers.
- Choose the exit deliberately: front door, because the rear door is sitting over the smoke and the rear wheels.
2. Which exit do you use, where do you put the passengers, and how do you account for them?
Read the worked answer
Front door, then away from the bus and away from the glass.
- The front door opens onto the sidewalk, farthest from the smoke and away from the moving traffic on the left. Keep the rear door closed.
- Get them out and moving, not bunched at the bottom of the steps. The glass bus shelter is not an assembly point; glass fails in a fire or when a tire lets go. Move the group at least 100 feet upwind of the coach, past the shelter, onto the sidewalk or into a business doorway.
- Direction matters: upwind and uphill of a burning vehicle, never downwind where smoke collects.
- Assign adults to the four children by hand, not by instruction. "Stay with an adult" fails; "hold this man's hand" works.
- Count at the door as they come off, then count again at the assembly point. The elderly man with the cane is your slowest mover and most likely to be missed, so account for him by name.
- Nobody goes back for a bag, a phone, or medication. Bags are replaceable, and the luggage area is next to the smoke anyway.
3. What do you do after the passengers are clear - reporting, injuries, and post-crash requirements?
Read the worked answer
Call 911 first, with the information that changes the response.
- Give the location in both directions, the number of passengers, whether fire is visible, and any injuries. Ask for fire and medical; a tire fire can reignite.
- Do not move an injured person unless they are in immediate danger from fire or traffic. Check the elderly man with the cane specifically - he is the highest-risk faller in any evacuation.
- Place reflective triangles behind and ahead of the bus once the passengers are clear and walking the roadway is safe.
- Notify dispatch, then write down witness names and what you saw and heard when the tire failed. Memory decays fast at a scene like this.
- Post-crash testing applies after a fatality, an injury requiring transport away from the scene, or disabling damage requiring a tow. Expect it and do not delay it.
- Do not discuss fault with anyone at the scene, including passengers. Give the facts to the officer and the company, and keep the rest for the report.