one eye

Asphalt, thats where I've seen those. That sucks when you have to transfer asphalt that hasn't been laid yet (you only have so much time to get it there and laid before it gets too cool and useless) I was watching stuff about that on the Discovery Ch. but not all times are like that, I know. most times theres a machine that holds and lays the asphalt and keeps it hot untill its needed.

Thanks for the bit of info about it, didn't know that.