Driverless cars use sensors and technology to navigate roadways without human assistance. They work by sensing their surroundings, processing sensory information to determine the appropriate path while avoiding obstacles and obeying traffic laws. Key technologies that enable autonomous driving include anti-lock brakes, electronic stability control, cruise control, lane departure warning, self-parking systems, LIDAR, radar and GPS. While driverless cars could improve safety and reduce emissions, issues around performance in poor weather, legal liability in crashes, and potential job losses remain challenges.