UPDATE SYSTEM FOR RELATED VALUE INFORMATION AND UPDATE METHOD FOR RELATED VALUE INFORMATION

An update system for related value information, comprises a first vehicle and a storage device which stores related value information. The first vehicle provides, to the storage device, travel information formed by associating a sensor value for identifying a road surface displacement-related value, and a measurement position at which the sensor value is measured, with each other, in a period from a time at which a predetermined measurement start condition is satisfied to a time at which a predetermined measurement end condition is satisfied. The storage device updates the related value information based on based on the road surface displacement-related values from which a low frequency component is removed. The storage device updates related value information based on the road surface displacement-related values obtained by excluding, at least one of start-stage related values or end-stage related values.