PROBLEM TO BE SOLVED: To determine whether a work vehicle is working in an up lane or a down lane.;SOLUTION: A work status display control device comprises: a position information acquisition unit that acquires position information indicating a current position of a work vehicle; a distance mark selecting unit for selecting a distance mark near the current position of the work vehicle indicated by the position information among a plurality of distance marks on the basis of the position information and distance mark information that is information in which a distance display of a distance mark indicating a distance from a starting point of a road and a position of the distance mark on a map are associated; a distance display acquisition unit that acquires the distance display associated with the distance mark in the distance mark information; a time-sequential information generation unit that generates time-sequential information that is information in which a time when the position information is acquired and the distance display are associated; and an increase/decrease determination unit that determines an increase or a decrease according to a time sequence of the distance display indicated by the time-sequential information.;SELECTED DRAWING: Figure 3;COPYRIGHT: (C)2019,JPO&INPIT
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