That's because we have helmet laws. I've seen guys in swim trunks and no shirts wearing helmets out here. I didn't have split lanes when I was still living in Cleveland despite being greatly tempted only because nobody knew how to stay in their damn lane. It was hard enough avoiding weaving cars when you were just occupying your lane as normal. However after learning to split lanes out here in Orange County I may consider it if I (heaven forbid) found myself commuting to work on I-90 when it clogs up from an accident. About doors, people can talk about throwing doors open all day but in reality you'll be far past any door opening fuckhead by the time they actually get the door opening. And in doing so they expose themselves to all kinds of other dangers, especially if they're moving. The air alone makes it quite difficult to open a door very far, so the door would blow right back shut. I'm sure they'd go swerving all over the place trying to hold a door open at 30-40mph and would righteously crash themselves.