No citation for your nonsense either so I actually went and looked. It turns out busses get into accidents more often per mile travelled [1]: "the number of bus accidents per million passenger miles (3.04) is comparable to the number of car accidents per million driven miles (3.21)" considering that a bus has more than 1 passenger on average it means their accident rate per mile travelled is way higher than a car.

1. https://www.sciencedirect.com/science/article/abs/pii/S00224...