You may read NHTSA Levels of Autonomy where you will find various categories of automating a car. The link are as follows
http://www.nhtsa.gov/About+NHTSA/Press+Releases/U.S.+Department+of+Transportation+Releases+Policy+on+Automated+Vehicle+Development
http://telematicswire.net/mag/2015/JanFeb/#/13
Good luck…well done
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