Today I saw a driver wearing a pistol....

Yes there is

 

Maby he is like me. I am full time Police Officer part time O/O I carry every place I go and can d so legally. (some exceptions apply)

 

None at all. This get's fuzzy because all companies under the sun ban firearms from being carried in their vehicles. Some smaller companies and of course true OO's could carry.

 

Perfectly legal in many places. There is no federal law against guns in trucks. Most states do not treat trucks differant than cars as far as guns are concerned. Many truckers carry. Unfortunately my company has a no gun policy, would be good to have one as I am local in chicago.

 

I'm sure he doesn't wear it when he's at shippers or receivers.

If you have the required permits you are allowed carry and should do so if you like. If your company doesn't think twice about putting your safety in jeopardy find a different outfit to drive for.

 

That may be true, but if someone has a California issued ccw is there any reason they can not carry in a truck?

 

Wrong there is no brotherly love. They will break it off in me just like they do to everybody. And if stopped or pulled around back of scale me being the police never comes up in conversation.