Another traffic related issue I don't really understand. So I've heard a bunch of stuff about how dangerous it is to drive close to the back of a semi truck. But the way I see it... a semi is the least dangerous thing to tailgate. One reason I've heard is that you can't see what's in front of the truck... but... if there's something blocking the path of you or the truck, it's gonna have a big ol' semi truck shaped hole in it. WTF?