Self-driving cars utilize a combination of sensor technologies, machine learning, and artificial intelligence to navigate and make decisions. Sensors, including cameras, lidar, and radars, gather data about the environment, detecting obstacles, road conditions, and traffic signs. This information is processed by AI algorithms that interpret the data, allowing the vehicle to make real-time decisions, such as accelerating, braking, or steering. The system continuously learns from experiences, improving its accuracy and safety. Overall, self-driving technology aims to enhance road safety and reduce traffic congestion.