Humans are very primitive, stupid even. If I'm bigger then you, I'll give you respect, but if I'm bigger then you, I can lord it over you. I'm pretty sure this is how most people think.

Being that I drive a tractor trailer for a living, people always brake if I'm taking 'their' lane to make wide turns and the like. But when commuting on the bike, I have to keep my head on a swivel, because no one is looking out for me or braking for me if I'm making a move, even when I signal.

I feel that a few requirements for getting a license should be, being able to drive a truck through any big downtown city, then hop on a bike and ride a similar route. Then they may pilot your average vehicle. I feel 50% of motorists should not be piloting anything, including shopping carts.

This will never happen, but awareness would be nice.