A backseat driver is a passenger in a vehicle who is not controlling the vehicle but who excessively comments on the driver's actions and decisions in an attempt to control the vehicle. A backseat driver may be uncomfortable with the skills of the driver, feel out of control since they are not driving the vehicle, or want to tutor the driver while they are at the wheel. Many comment on the speed of the vehicle, or give alternative directions.
The Google car below is one of many self driving cars that will soon be making our lives safer, less expensive, more productive and more convenient. Very soon we will all be the BackseatDriver we always wanted to be.