San Tin Interchange Remote Control Panel for Traffic Controller

Detailed Information

  • Construction Date


  • Category


This project involves the installation process of a traffic light control at San Tin interchange. A control panel installed with a S7-200 PLC is connected via a PPI connection, with another S7-200 PLC for remote monitoring and control of the traffic light. Switches and light bulbs within the PLC were also installed for the control and display status of the traffic light system.

Traffic light indication during tunnel operation is mainly to inform tunnel-users current traffic conditions.  With the help of CCTV, operators can use our system to immediately display the changing or emergency traffic situation. So that public user is well aware and updated on the condition before making entry into the tunnel and maintain a safe speed while commuting.