driving on weed ain't shit i have been all kinds of fucked up on weed and still had no trouble driving home i remember when me and my buddy rolled a half ounce and a quarter of some of his homegrown chronic into a 16 inch blunt wrap it took us 30 minutes just to roll the damn thing and about 3 hours to smoke it with 4 people in rotation needless to say i was all kinds of fucked up and after we smoked it i drove over to my aunt's house and drove just fine then again it is like an hour of nothing but dirt roads to her house so that helped me out driving on acid can be a bit of a pain in the ass though if you are tripping on some good shit been there a few times and it ain't fun believe me