Why? You can kill a pedestrian, bicyclist, or motorcyclist just as easily with any of them. Why not improve the drivers test to actually test people? That should cut down on accidents across the board.

F=ma.

I agree that U.S. states should provide far more driver's training and have much stricter testing requirements before issuing licenses. We also need additional tiers to our licensing.

"We also need additional tiers to our licensing."

What and why?

Two examples: In my state, a sixteen year-old with a newly minted standard car driver's license can by themselves legally operate a loaded 26' box truck, including one towing a trailer. With a motorcycle endorsement, they're permitted to pilot a bike with an engine of any displacement.

Ok? The motorcycle endorsement is already a separate tier. I don't think there's anything wrong with operating a box truck on a regular license. There's not that much difference in vehicle operation (still hydraulic brakes, etc), just some additional emphasis on load distribution, engine braking, and speed/braking distance - which is still important in many smaller vehicles. I do think the regular license test should be more rigorous, since it doesn't even cover these topics sufficiently for the smaller vehicles.