To provide technology to allow for smooth traffic control.SOLUTION: An approach propriety determination unit 1 includes: a vehicle point acquisition part 311 that acquires vehicle points Pt1 and Pt2 of a first vehicle 2A and a second vehicle 2B when the first vehicle 2A enters a traveling path 12 of the second vehicle 2B; a score calculation part 312 that calculates a first score Sc1 using the vehicle point Pt1 acquired for the first vehicle 2A and calculates a second score Sc2 using the vehicle point Pt2 acquired for the second vehicle 2B; and a determination part 313 that determines whether or not to permit the first vehicle 2A to enter the traveling path 12 by comparing the first score Sc1 and the second score Sc2 calculated by the score calculation part 312.SELECTED DRAWING: Figure 2
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