I spent a couple of summers working for the Thomas County highway department when I was in high school, so I'm an expert on road construction. Obviously not, because I had no idea they put vibrators on road rollers (packers) nowadays. Holy crap, the one driving working the street next to my house is shaking the whole freaking house. Took me forever standing there watching the thing before I figured it out. Driving that somB all day must be a bitch.