IN-VEHICLE DEVICE, TRAFFIC LIGHT CONTROL DEVICE AND TRAFFIC LIGHT SYSTEM

摘要

To provide a technology that allows a vehicle driver to quickly determine whether or not a traffic light senses a vehicle.SOLUTION: A traffic light includes an in-vehicle device 1 and a traffic light 2. The in-vehicle device 1 is mounted on a vehicle 9. When detecting the stop of the vehicle 9, the in-vehicle device 1 transmits a sensing request for requesting sensing of the vehicle 9 to the traffic light 2. The traffic light 2 senses the vehicle 9 that has entered a sensing area. When receiving the sensing request from the in-vehicle device 1, the traffic signal 2 transmits response data including the sensing result of the vehicle 9 to the in-vehicle device 1 as a response to the sensing request. When receiving response data for the sensing request from the traffic light 2, the in-vehicle device 1 notifies whether the traffic light 2 has sensed the vehicle 9 based on the sensing result included in the response data.SELECTED DRAWING: Figure 1