If u have seen MAD MAX the road warrior u would thinks its a good idea too.....

What is this idea exactly

There are already Mad Max references in all Fallouts: dogmeat, the leather armor with one cutoff sleeve, etc...

.. besides, what are you going to do with gas when vehicles run on nuclear cells (not to mention they are no drivable)?

My Avatar says yes

Same, I can't see any ideas. Unless you mean combining them, which has sort of already been done. Fallout is based on Mad Max, and has quite a few references.

And no, cars would not be a good idea. it really, really wouldn't work given the game engine. You'd have to redesign the whole thing from scratch, and even then, there's a roughly 90% chance it'd be worse off with vehicles added in.

Average Uneducated Wastelander: "Cars are supposed to move? I thought they were just big land mines."

Yeah, OK. There is a thread for http://www.gamesas.com/index.php?/topic/1088178-what-do-you-want-in-new-vegas/ - perhaps use it?