Big does not have to mean slow to stop; you just have bigger brakes (and since they're power, the force doesn't matter). Once the vehicle::pedestrian mass is h

Big does not have to mean slow to stop; you just have bigger brakes (and since they're power, the force doesn't matter). Once the vehicle::pedestrian mass is high enough, a higher ratio won't change the kinematics much. And how are you thinking that a driver of a big vehicle is more at risk than that of a small one? And, Einstein has nothing to do with it.