Who are those people who work on the highway who can only pull trucks over and picks up trash in the highway?

Question

They pull trucks over if they don't weight theirselves correctly or if they have suspision of drugs on their truck and they also pick debree up off of the highway like tires and stuff but they drive something like a cop car. I can't think of what they're called and it's driving me nuts! And they pulled me and my boyfriend the other day for "driving too fast" but idk how because radars can't detect people who drive right besides them... We didn't know they can pull people over... ?

Answer 1

Department of Transportation.  They can pull anyone over in their jurisdiction.