Google began developing self-driving car technology in 2009. Their self-driving cars use sensors like video cameras, radar, and laser rangefinders along with detailed maps to navigate roads without human intervention. The software processes sensor data in real-time to detect objects and safely maneuver the vehicle. Google's cars have driven over 200,000 miles with only one minor accident caused by a human driver. While self-driving cars could significantly reduce accidents, challenges remain regarding costs, regulations, and educating people.