Abstract
The Metropolitan Expressway, which is located in the Tokyo Metropolitan Area, has the complicated network and has been served over the years under the harsh condition of a huge number of traffics. Partial damages of the structures have been noted recently due to heavy traffic so that the importance of maintenance is increasing. However, more efficiency of inspection and repair is required for reducing the maintenance cost. The Metropolitan Expressway Public Corporation has been conducting the Origin-Destination surveys periodically and checking vehicular axle loads at the toll gates to crack down on overload offenders. This paper proposes the procedure to evaluate the effect of heavy traffics against the fatigue of the structures using the Origin-Destination surveys and the vehicular axle loads and also evaluate the fatigue environment for the Metropolitan Expressway.
