One reference: http://www.extremetech.com/extreme/126841-cadillac-promises-self-driving-cars-by-2015 http://www.extremetech.com/extreme/126841-cadillac-promises

One reference: http://www.extremetech.com/extreme/126841-cadillac-promises-self-driving-cars-by-2015 http://www.extremetech.com/extreme/126841-cadillac-promises-... Under some conditions (good visibility, easy-to-see lane markers, etc.)