Seeing as Arduino is good for controlling motors and sensors, Randy added a PING ultrasonic sensor to the front of the vehicle too.

A low-cost (~$100), do-it-yourself (DIY) ultrasonic water level sensor/datalogger has been designed, constructed, and tested for use in education, citizen/community science, and research settings. The ...

The car that's a Wi-Fi hotspot: Maserati lets passengers stream content - and uses ultrasonic sensors to remove blind spots The car is on display at this year’s Mobile World Congress in Barcelona ...