| 摘要 |
PURPOSE:To automatically grasp the travel state of each mobile body without intervention by a driver, and enable the efficiency of central control to be improved and a burden on the driver to be lessened by causing the communication means of a central control device to request the transmission of travel state information from the terminal device of each mobile body at the predetermined intervals, and further causing the communication means of the terminal device to automatically transmit the mobile body's own travel state information to the central control device. CONSTITUTION:The communication means of a central control device 1 requests the terminal units 3-1, 3-2 to 3-n of respective mobile bodies to transmit travel state information at the predetermined intervals. The communication means of the devices 3-1, 3-2 to 3-n automatically send the travel state information of own mobile body to the central control device 1, upon receipt of the request. As a result, the travel state of each mobile body can be automatically grasped without intervention by a driver, thereby enabling central control efficiency to be improved and a burden on a driver to lessened. |
