I really love the setting and concepts in this game. You get a bit of that, "what the heck is going on" feeling that a person in a post apocalypic setting would get, especially one that seems to have happened not too long ago in the lifetime of everyone except very young children.
The vehicle rules take up several pages, but don't seem like a good fit. Trees are everywhere and have broken up roads, runways, etc. However, example vehicles include sports cars and fighter jets as well as rules for vehicle chases. The setting material makes me think you might get a Jeep through, but a motorcycle (dirt bike type) would probably be the best choice for motorized vehicle... if you even have fuel. Aircraft rules could be left out altogether as well as chase, ramming, and vehicle mounted weapon rules. I don't get the Mad Max road warrior vibe from the rest of the setting. I dare say the vehicle rules could probably be left out altogether.
The game tries to deemphasize gear, but a little more detail on common gear, what communities value, etc, would be useful.
Overall a really interesting game. Even if you don't want to use the system, this would be really easy to convert to another system and use the setting ideas.