Kind of a no-brainer. But usually, the driver isn't even charged! Part of the problem is that it's not exactly clear what crime is committed when a car jumps the curb and mows down innocent people.
Here's the answer: make driving on the sidewalk an arrestable offense. It's not something you have to arrest a driver for. But when you come on the scene and somebody is dead, it gives police something to charge the driver with.