text: The cars use cameras and sensors to model the cars 3D surroundings. A combination of the cameras and sensors help the car mimic the skill of a human at the wheel. A person must always be aware and ready to take the wheel when problems occur. If someone is on a long car ride inside one of these driverless cars they would most likely become bored and wouldn't be paying any attention to the road. If a problems were to arise and the drivers is asleep or not paying attention when the car needs the driver to take over the drivers reaction would be delayed and an accident could occur.