Ummm, how about instead of spending a ton of money putting the signs lower, putting more cops on the street to get the damn drunks off the freakin road. Sure, putting the signs lower might help, but wouldn't that be like telling the community it's ok to drive drunk as long as you look at the signs that are low to the ground????
Plus, depending on how drunk you are, they could plaster the damn sign on your windshield and you still wouldn't see it. Geeeeez!!!!