Patent ID: 8244451

Claim:
A traffic information providing system, comprising: a traffic information providing apparatus which delivers collected road traffic information to a communication network; an in-vehicle information apparatus which is installed in a vehicle, and receives road traffic information delivered to said communication network; a transmitter, which is disposed in said traffic information providing apparatus, and transmits, via said communication network, (i) a defined link group from a plurality of link groups that includes at least one of a first link group comprising a plurality of road links which are similar to each other with regard to traffic information, and a second link group comprising a plurality of road links which are similar to each other with regard to geographic and environmental information, (ii) traffic information corresponding to said transmitted link group; and a delivery unit that compares said traffic information of each road link of said first link group and, when there is an aberrant road link whose difference exceeds an expected value, said delivery unit delivers traffic information that corresponds to the aberrant road link.