Cadillac has outscored Tesla in a Consumer Reports evaluation of semi-automated driver aids that can help steer and brake a car to different extents. The GM brand's Super Cruise system put in a better overall performance than Tesla's Autopilot across a range of criteria, the testing organization said, while Nissan's ProPilot Assist and Volvo's Pilot Assist were far behind the top two. Consumer Reports found Super Cruise to do the best job balancing its capabilities with safety, praising its ability to tell if a driver is paying attention to the road and ready to take control in an emergency. Super Cruise only works on highway sections that it knows it is able to operate effectively on, thanks to a database of 3D maps. It uses a combination of cameras, radars and ultrasonic sensors to monitor the road, and a camera in the cabin that can determine if a driver is looking ahead with their eyes open.