Sounds like the driver's at fault to me. In this case the bus stopped abruptly for no apparent reason, but what if there had been a reason? Perhaps someone walk

Sounds like the driver's at fault to me. In this case the bus stopped abruptly for no apparent reason, but what if there had been a reason? Perhaps someone walked into traffic or there was debris on the road. Drivers need to leave enough space ahead to come to a safe stop when the vehicle in front of them stops abruptly.