Honestly, they should only allow devices with removable batteries, and they could have a bucket of sand outside the bus that holds those batteries. Kind of like how bicycles are attached to the front, you’d drop the battery in and then board the bus.
That’s what the external bucket of sand is for. It’ll smoke and the driver will notice in time to safely get everyone off the bus. They could then likely just detach the bucket and reboard if everything looks fine.
Honestly, they should only allow devices with removable batteries, and they could have a bucket of sand outside the bus that holds those batteries. Kind of like how bicycles are attached to the front, you’d drop the battery in and then board the bus.
But what if the battery starts burning while the bus is moving, on the road… Like in the middle of a desert (…wait… but still…)?
That’s what the external bucket of sand is for. It’ll smoke and the driver will notice in time to safely get everyone off the bus. They could then likely just detach the bucket and reboard if everything looks fine.