The transmission of the code of the road recalled to the driver in the practice of the driving a car.

摘要

The verbal and audio signal circuit warns a driver of a dangerous area or a stopping site as it is approached. The vehicle has an infra-red transmitter-receiver (2,3) mounted low down on one side of the vehicle. Infra-red reflectors (6,7) are fixed to the road side in front of the dangerous area and have different reflective characteristics for different risk types.