text: Not only can the cars drive by themselves, they can also alert drivers if it needs help. The car is filled with sensors; it makes sure the driver is always alert and has their hands on the wheel. The driver will be alerted by their chair vibrating, flashing lights, or different displays. This means the driver will be alerted if there's any danger. For example, if the car was backing up into something, it would alert the driver to check it out and take over just incase somebody were to get hurt.