well, whatever the reason u r pulled over...they can only keep u as long as it takes to check u for warrants and write the tickets. so if there is no plane site probable cause and the cop trys to talk to or keep u there, u need to tell him to write u the ticket for the violation and leave. if u r ordered to stay without probable cause then u have a suit for being held against your will, which is a felony. bottom line dont be stupid and carry your drugs/illegal weapons in your car or dont be driving with suspended licenses or warrants.