TRIAL OPERATION OF A NEW PUBLIC TRANSPORTATION PRIORITY SYSTEM USING INFRARED BEACONS FOR TWO-WAY COMMUNICATION
1996
The Universal Traffic Management Society of Japan (UTMS Japan) and the Hokkaido Prefectural police HQ as a joint development team developed a new Public Transportation Priority System (PTPS). This system performs bus-prioritized traffic-actuated control on traffic signal controllers at a group of intersections, right turn bus-prioritized signal control at an intersection where a bus route turns right, and displays a warning message on a display board to alert a violating ordinary vehicle traveling on an exclusive bus lane by employing newly developed roadside infrared beacons and in-vehicle units, both dedicated to two-way communication, mounted on buses. In the new PTPS, because the identification number (ID) information of a bus can be transmitted to the system through the roadside infrared beacon, the traveling position of the bus can be readily recognized by the system. Conversely, the system can convey various items of information to the bus through the roadside infrared beacon. This means that the PTPS of a traffic administrator can be linked to bus management systems independently operated by local bus service companies to form an integrated system, which can contribute to the rationalization of investment (savings in investment cost). With assistance from a local bus service company, the joint team for PTPS development put the newly developed PTPS into trial operation in March 1966 on National Highway Route 36 in Sapporo City, Hokkaido Prefecture, verified the effectiveness of the developed PTPS for maintaining bus service on a fixed-time and fixed-speed basis, and experimentally used information collected on the traveling position of each bus from roadside infrared beacons for information provision service to both the bus service company and the bus users.
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