the fed does regulate it in the manner i previously described. it just does not regulate every aspect of it. it regulates the age, and BAC limit by witholding federal highway dollars for road maintenance. Thus states would rather comply than lose those funds.
this is just one example. the fed also regulates transportation and shipping between states. every see a diesel rig with DOT sticker? that means they are regulated by the federal government. it provides consistency.
ANd you're wrong again. What a shock.
The feds only have regulations for speed limits and BAC on interstate highways, which are actually "owned" by the federal government even though each state takes care of that that is located in their own states as far as maintenance and policing. IOW the feds don't know nor care what each state is doing in regards to speed limits on state highways and they don't help fund maintaining them either.
look it up again. i didnt say they regulated everything. they regulated part.
see what happens if a state decides to making the legal driving age 14. or wants to make the BAC minimum .10, or wants to allow people to drink while a passenger in a motor vehicle. youre federal funding will be pulled so fast you wont know what hit you.
this proves my point.
Federal requirements for driver's licenses a costly headache for states
"The Real ID Act sets minimum security standards for state IDs, a response to the fact that several Sept. 11 hijackers had U.S. driver's licenses, some of them fraudulent. But the act was tacked onto a military appropriations bill, and critics say it was passed with little debate by Congress and no input from the states, which will wind up footing 99 percent of a very big bill."
and before you go into the see federal regulation costs money, that is not part of the debate here. (oh and Bush signed this into to law when he had a change to veto it and he didnt)