This chart shows the number of incidents and injuries per 100 million passenger miles traveled by transportation type in 2002 . Different types of vehicles have different counts.
The lowest number of incidents and injuries are usually caused by commuter rail only 20 incidents and 17 injuries per 100 million PMT . It proofs that the most safe vehicles is the commuters .
Buses are gotten highest scores according to this metric. 76 incidents and 66 injuries. But the Light rail has close records for buses . It shows that buses and light rails are in the same area of safety.
Heavy rail transport has 51 incidents and 35 injuries per 100 million miles. Heavy rail transportation is less dangerous than light rails and buses but less safe than commuters.
To conclude, the most safe transportation is commuters and the less are buses
