In a move designed to protect residential areas from big trucks, it's generally prohibited (with clear signage) to drive one into most residential streets in California. Moving Trucks are generally excepted. These signs are all over the place, and similar signage is common all over the country. But, until Slate wrote this very interesting article, it didn't dawn on me that the majority of big SUVs actually violate this law, which predates the craze for monster trucks.

Though clearly not the intention of the law to ban non-commercial vehicles, it would be rather amusing if they started enforcing it - every single street in Beverly Hills, aside from main thoroughfares, falls under this ordinance. Even more amusing is the fact that many big SUVs have been classified as commercial vehicles in order to qualify for a tax break, so the law does, in fact, apply to them.