I have witnessed folks rushing to a seat before the bus driver has a chance to pull off. This is because they don’t want to get knocked down.
Buses need something that sci-fi shows have used for years, “Inertial Dampeners”. This is the techno-babble that explains why the characters in the show don’t get knocked over when the ship changes direction.
This would cut down on folks getting knocked over and into other passengers over the course of the ride, Also include light rail and subway trains.