Lego Mindstorms NXT - Auto Parking Car, Self-Parking Car

This car can search for a parking spot (using ultrasonic sensor), and when it finds an empty space, it starts measuring it, and if it was enough, it parks itself automatically. If the space is narrower, it parks itself in another way, like SMART car. If the space is too small to park, it keeps on searching for a parking spot.
The car can also move itself out of the parking spot when it receives a voice command.