Originally Posted by CarFreeFam4

On what do you base that argument?

According to the NHTSA, transit bus are involved in 0.2% of all collisions from which a fatality resulted. That doesn't mean that 0.2% of the fatalities were people on buses. That could be an occupant of a car that a bus collided with, a pedestrian or a cyclist. In 2009, of 28,936 fatalities of occupants of a vehicle, 26 of those were passengers on a bus (this includes charter, private, school and transit buses, not transit buses exclusively). 13,095 of those fatalities were occupants of passenger cars. Your children are statistically much, MUCH safer on a bus with or without a car seat than they are in a passenger car.

This interactive table has a lot of interesting information regarding traffic fatalities from 1994-2009.