Get the good vehicles to the parking spots, and knock the bad ones off of the screen. Tap on a parked car to make it drive, and tap a moving car to hit the brakes!
Knock all of the bad (dark-colored) vehicles off of the screen using the police car, fire truck, ambulance, and fire engine. Click on a car to make it drive, and click on a moving car to hit the brakes. Get your cars to the right parking spots for bonus points!