Provided is a traffic control system for allowing vehicles to travel unattended while maintaining their inter vehicular distances without interfering with each other. A vehicle traffic control system is provided, including an onboard control apparatus mounted on each of a plurality of vehicles; a traffic control apparatus which divides tracks for the multiple vehicles into a plurality of sections and which performs a blocking control to assign non-overlapping travelable sections to the multiple vehicles as a permitted travel section each; and communication means for allowing communication between the traffic control apparatus and the onboard control apparatus. Each of the onboard control apparatus sets a travel permission request starting distance as a distance longer than a stoppable distance on the basis of the current speed of the own vehicle. Each onboard control apparatus transmits repeatedly a travel permission request and current position information on the own vehicle to the traffic control apparatus until the next travel permission is obtained when the remaining length of the permitted travel section has become shorter than the travel permission request starting distance in the advancing direction of the own vehicle.
