Here is a quick simple overview of how the Driverless car works.
It is a great quick video for anyone new to the subject to gain an understanding of the various technologies involved.

Should you wish to find out more on the various terminologies mentioned, a glossary on Radar, Lidar, Cameras, Sensors and other components can be found here...

"Privacy note - Please note, clicking the above link will take you to a ooyala.com video Webpage. Whilst we believe that the information gained through clicking this link will be beneficial to our visitors, it may cause a 3rd party cookie or cookies to be placed on your device. Further information about cookies and how to delete them can be found in our privacy policy"