I am more likely to drive without my keys than a pipe. I’m not even sure what problems smoking a pipe while driving would be. I mean, I don’t cube cut, or slice plugs, or do any fancy pipe loading tricks while driving. I just light my pipe, put it in my clench, and go. And, if I have to relight (which is rare) or tamp, I can still keep a hand on the wheel. The only time it could be dangerous is if I am trying to have sex with a couple of girls and smoke my pipe while driving... but, my wife has slowed all of that down for me.