Configuration of TRAM Signaling System
Tram signaling system consists of a tram control center, a Traffic Control Surveillance Center, and a wayside facility
- The Tram control center monitors and controls train operation, comprehensively manages data on signaling devices, and monitors and controls the entire Tram signaling system.
- The Traffic Control Surveillance Center controls traffic lights, traffic lights dedicated to the tram, and provides road traffic information for tram-signal-priority requested by the Tram control center or Tram.
- The wayside facility sends and receives information from the Tram control center or the Traffic Control Surveillance Center, controls the point machine, and sends the status of movement of the tram to the Tram control center.
Configuration and function of the Tram Signaling System
| Device | Sub-device | Detailed functions |
|---|---|---|
| Automatic Train SurveillanceDevice | ATS | - Route control by Tram Tracking based on Tram operation schedule - Tram-signal-priority request - Automatic route control |
| Console | - Tram signal information display and MMI | |
| LDP | - Tram signal information (tram location information, point machine, signal, etc.) and CCTV information display | |
| Control operation support Device | ATS support Server | - Receiving of train location information from the Tram ATS server and Tram support equipment - Management of Tram location information received - Management of Tram operation schedule, Tram distribution - Interface with Traffic Control Surveillance Center - Information display and MMI - Interface with local equipment and external equipment |
| ATS support console | - Display of Tram operation status - MMI |
|
| EIE | ELE | - Control of the status of the local equipment(pint machine, route indicator) by the local control equipment |
| Wayside equipment | Local Control Device | - Receiving of route control command from EIE - Control the pint machine and route indicator using the route control command |
| Tram signaling equipment | - Receiving of intersection pass information, Tram ID and location information from ATS support server and Tram support equipment - Tram-signal-priority request to road traffic signal controller - Detection of inconsistencies between tram light and road traffic signals at intersections |
|
| Onboard equipment | Tram support equipment | - Detect the location of the tram and send it to the Tram signal equipment and the ATS support server - Receive Tram operation schedule compliance information from the ATS support server and show it to the driver - Performs the driver's manual route request |
Tram-priority-signal
- Granting priority to the tram over other motor vehicles at the intersection
- Ensuring uninterrupted and on-time operation of the tramway
- Application of the operating strategy for the unit of the stop that runs from the intersection to the next stop without stopping
| Type | Method | Detailed functions |
|---|---|---|
| Passive | Signal Cycle Shortening Current Partition | Static application of signals in favor of the Tram using a driving history |
| Active | Early Green | Tram signal early presentation |
| Green Extension | Tram signal extension | |
| Phase Insertion | Tram signal insertion Implication of hazards due to driver-predictive driving |
