To cancel the repetition of acceleration and deceleration of a traveling vehicle in a simple control system in deceleration control of a traveling vehicle.

A plurality of sections where the deceleration speeds of a traveling vehicle are different are arranged on a traveling path. The traveling vehicle calculates an interference avoidance distance by using the traveling speed of the traveling vehicle, the maximum deceleration speed among deceleration speeds in the plurality of sections, and a body length parameter. The body length parameter in the section whose deceleration is smaller than the maximum deceleration is made longer than that in the division with the maximum deceleration. As a result, it is possible to avoid the repetition of the deceleration and re-acceleration of the traveling vehicle, and to avoid the interference of the traveling vehicles under simple control.

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