I've read few articles on generating applications. Mostly propane-based, out in the real remote locations.
Also for wood stoves, but the overheating issue is a biggie. Too easy to cook your investment w/o much of a return.
Anyway, you're stuck in traffic, and there's not much [cool] air moving across the the cooling fins, and you end up
like the guys with baked peltiers on wood stoves.
I'd rather have an RTG, myself... :)
A GTO with an RTG. What a combo!