How does a remote parking assistance feature work on a car?

What will be an ideal response?

The feature allows the driver to pull a car close to a parking space, and then get out. After exiting the vehicle, the driver presses a button on his keychain that tells the car to park itself automatically. This feature is very useful for parking in a narrow space for parallel parking. The car uses a system of sensors that emit ultrasonic sounds to detect cars, the curb, and pedestrians. Many versions also include video cameras to monitor the location of the curb and any painted parking-space lines. A computer in the car uses this information to automatically pull the card to the space, while avoiding collisions.