Self-driving cars use sensors like radar, GPS, and computer vision to detect their environment without human input. Advanced control systems interpret sensory data to identify paths and obstacles. Technologies used include anti-lock brakes, adaptive cruise control, and lidar systems. Algorithms like edge detection are used to locate intensity contrasts and track objects over image sequences. Self-driving cars aim to increase road capacity, relieve drivers, avoid accidents, and minimize loss of control compared to human drivers.