I think I understand what you are asking,


First, I do not tell anyone, if I am pulled over, that I have weapons in the trunk. If they are in the trunk, then there is no threat.

As far as a handgun in the car goes, for protection while driving? In Colorado it is no problem, the law in CO specifically addresses that. Out side of CO, you may have a problem.

http://www.packing.org/ is probably the single one source of accurate info on the web.