Cars and Driving
Automobiles
Kelley Blue Book: Prices for new and used cars, reviews and ratings.
NADA Guides: Vehicle pricing & information (includes RV's).
Price Hub: Used car comparison; model, year, actual sale price, mileage,etc.
Fuel
Alternative Fuels: US Dept of Energy's database.
Fuel Economy: Compare fuel economy data for vehicles, calculate MPG, find cheaper gas, and more.
Safety
Safer Cars: Rankings of all major cars.
Traffic
Traffic Incidents: Southern California accidents, debris reports.