local vehicleList = this.vehicleList();
		local unitnumberList = AIList();
		for (local vehicle = vehicleList.Begin(); !vehicleList.IsEnd(); vehicle = vehicleList.Next()) {
			if (AIVehicle.IsValidVehicle(vehicle) && AIVehicle.GetVehicleType(vehicle) == AIVehicle.VT_ROAD) {
				local unitnumber = AIVehicle.GetUnitNumber(vehicle);
				if (!unitnumberList.HasItem(unitnumber)) {
					unitnumberList.AddItem(unitnumber, vehicle);
				} else {
					local value = unitnumberList.GetValue(unitnumber);
					if (value != vehicle) {
						unitnumberList.SetValue(unitnumber, vehicle);
					}
				}
			}
		}
		
		for (local unit = unitnumberList.Begin(); !unitnumberList.IsEnd(); unit = unitnumberList.Next()) {
			if (AIVehicle.IsValidVehicle(AIVehicle.GetVehicleID(unit, AIVehicle.VT_ROAD))) {
				if (AIVehicle.GetVehicleID(unit, AIVehicle.VT_ROAD) == unitnumberList.GetValue(unit)) {
					AILog.Info("unit_number " + unit + " is vehicle_id " + AIVehicle.GetVehicleID(unit, AIVehicle.VT_ROAD) + " == " + unitnumberList.GetValue(unit));
				} else {
					AILog.Error("unit_number " + unit + " is vehicle_id " + AIVehicle.GetVehicleID(unit, AIVehicle.VT_ROAD) + " != " + unitnumberList.GetValue(unit));
					AIController.Break(" ");
				}
			} else {
				AILog.Error("unit_number " + unit + " is vehicle_id " + INVALID_VEHICLE + " <> " + unitnumberList.GetValue(unit) + " INVALID_VEHICLE");
				AIController.Break(" ");
			}
		}