Radar, camera, LiDAR and V2X for autonomous cars

Vehicle autonomy and driver assistance systems rely on a combination of a balanced mix of technologies: RADAR (RAdio Detection And Ranging), LiDAR (LIght Detection And Ranging), cameras and V2X (vehicle -to-everything) communications. These technologies often have overlapping capabilities, but each has its own strengths and limitations.

https://blog.nxp.com/automotive/radar-camera-and-lidar-for-autonomous-cars