Road-vehicle communication system

A road-vehicle communication system, comprising:

• a first roadside apparatus, provided in an entrance ramp of a toll road, configured to give entry gate pass information to vehicles passing through a communicable range;
• a second roadside apparatus, provided in an exit ramp of the toll road, configured to acquire from a passing vehicle any entry gate pass information given by the first roadside apparatus;
• a third roadside apparatus, provided further on an upstream side than a turning point to the exit ramp of a main lane of the toll road, configured to perform short-range communication with a vehicle-mounted device mounted on a vehicle traveling on the main lane of the toll road;
• and
• an administration device configured to communicate with the second roadside apparatus,
• wherein the administration device is configured to judge whether the entry gate pass information is acquired from the passing vehicle by the second roadside apparatus and provide, if entry gate pass information is not acquired, via the second roadside apparatus, reverse-way traveling warning information for warning the passing vehicle that the passing vehicle is traveling in a reverse way, and
• wherein the administration device is configured to communicate with the third roadside apparatus and provide, if the entry gate pass information is not acquired from the passing vehicle by the second roadside apparatus, via the third roadside apparatus, reverse-way traveling vehicle warning information for alerting the vehicle traveling the main lane of the toll road that a reverse-way traveling vehicle is present.