PROBLEM TO BE SOLVED: To prevent a decrease in work efficiency without complicating a configuration and increasing a cost.SOLUTION: A travel control system for a work vehicle comprises: situation measurement sensors 101, 102 provided in the work vehicle and configured to measure a situation around the work vehicle； an automatic travel control unit that automatically travels the work vehicle on the basis of measurement information acquired from the situation measurement sensors 101, 102； an abnormal output range specifying unit that, on the basis of a plurality of sensor outputs in respective measurement ranges of the situation measurement sensors 101, 102, specifies an abnormal output range in which the sensor outputs are abnormal； and a restraining state switching unit that, according to the magnitude of the abnormal output range specified by the abnormal output range specifying unit, freely switches between restraining state in which automatic travel of the work vehicle by the automatic travel control unit is restrained and non-restraining state in which automatic travel of the work vehicle by the automatic travel control unit is not restrained.SELECTED DRAWING: Figure 17COPYRIGHT: (C)2020,JPO&INPIT【課題】構成の複雑化、及び、コストの増大を招くことなく、作業効率の低下を防止すること。【解決手段】作業車両に備えられ、作業車両の周囲における状況を測定する状況測定センサ１０１，１０２と、その状況測定センサ１０１，１０２の測定情報に基づいて、作業車両を自動走行させる自動走行制御部と、状況測定センサ１０１，１０２の測定範囲内における複数のセンサ出力に基づいて、センサ出力が異常な異常出力範囲を特定する異常出力範囲特定部と、その異常出力範囲特定部にて特定された異常出力範囲の大きさに応じて、自動走行制御部による作業車両の自動走行を牽制する牽制状態と、自動走行制御部による作業車両の自動走行を牽制しない非牽制状態とに切替自在な牽制状態切替部とが備えられている。【選択図】図１７
