PROBLEM TO BE SOLVED: To provide a technology capable of achieving a work travel on as proper a traveling route as possible without delaying start of the work travel.SOLUTION: The traveling route determination device includes: a route management part for storing a number of traveling route factors covering a work object region a first route factor selection part 631 for calculating a selection order of the traveling route factors for all traveling routes on the basis of a basic priority rule prior to the work travel of a service car a second route factor selection part 632 for extracting, as re-calculation traveling route factors, traveling route factors for no travels from a traveling route factor group during a work travel based on the selection order and re-calculating a selection order of the re-calculation traveling route factors on the basis of a cost evaluation rule and a route setting part for correcting the selection order of the first route factor selection part 631 according to the selection order of the second route factor selection part 632.SELECTED DRAWING: Figure 12COPYRIGHT: (C)2018,JPO&INPIT【課題】作業走行の開始が遅れることなく、できる限り適正な走行経路での作業走行が実現する技術が要望されている。【解決手段】走行経路決定装置は、作業対象領域を網羅する多数の走行経路要素を格納する経路管理部と、作業車の作業走行の前に、基本優先ルールに基づいて、全走行経路分の走行経路要素の選択順番を算出する第1経路要素選択部631と、この選択順番に基づく作業走行中に、走行経路要素群から未走行の走行経路要素を再演算走行経路要素として抽出し、コスト評価ルールに基づいて再演算走行経路要素の選択順番を再算出する第2経路要素選択部632と、第1経路要素選択部631の選択順番を第2経路要素選択部632の選択順番で修正する経路設定部とを備えている。【選択図】図12