Car-car-communication-based prompt system and method substituting car horns

The invention discloses a car-car-communication-based prompt system and method substituting car horns.The car-car-communication-based prompt system comprises a car horn module, a navigation positioning module, an information processing unit, a car-loaded terminal and a car-car-communication unit.The car-car-communication-based prompt system and method are suitable for special cars, a car-car-communication technology is utilized to notify a car in front of the special cars to give way timely; meanwhile, the horn-blowing control road segment and the non-horn-blowing control road segment can be recognized; in the non-horn-blowing control road segment, warning information is transmitted through car horns; in the horn-blowing control road segment, car horns are turned off, a car behind the special vehicles collects horn voltage through the car horn module to obtain information of horn-blowing time and times, the information processing unit conducts processing and generates prompt information according to the horn