Transporting vehicle system, and method of controlling transporting vehicle

A transporting vehicle system comprising:

• a plurality of transporting vehicles that travel along a route including node points that include branch points where the route branches off and merge points where the route merges into, and zones located between the node points;
• and
• a controller;
• wherein
• the controller is configured or programmed to set a first prohibited travel zone that is one of the zones where entry of the transporting vehicles is prohibited;
• the controller is configured or programmed to set a second prohibited travel zone upstream of the first prohibited travel zone;
• the controller is configured or programmed to control the transporting vehicles to prevent the transporting vehicles from entering the first prohibited travel zone or the second prohibited travel zone;
• if one of the node points upstream of the first prohibited travel zone is one of the merge points, the controller is configured or programmed to set all of the zones that merge into the one of the merge points as additional prohibited travel zones;
• and
• if one of the node points upstream of the first prohibited travel zone is one of the branch points and all of the zones branching off from the one of the branch points are the additional prohibited travel zones, the controller is configured or programmed to set one of the zones upstream of the one of the branch points as one of the additional prohibited travel zones.