Automatic platform gates completed at eight MTR Stations

“As the APGs are secured to the platform floor from the bottom, the alignment of the gates can be affected by the piston effect of passing trains or if pushed or bumped.
However, any shift of just a few millimetres would trigger the fail-safe mechanism to stop trains from automatically entering or departing a station,” explained Chief of Operations Engineering Mr David Leung.
“That is why we are still in the process of fine-tuning the gate control system to optimise performance, which is the final part of the testing and commissioning process. In the meantime, we thank passengers for their understanding if there is any delay caused to train service. ”
Retrofitting APGs in stations already in operation is very complex as works could only be carried out during a few overnight hours so as not to affect normal passenger train service during the day. In those few hours, any doors installed had to be tested and commissioned for operation when train service started again the next morning. In addition, the APGs had to be tailor-made for each platform to precisely suit its specific conditions. Mr Leung said the project was made more complicated because the APGs had to sit evenly on the platform floor for smooth operation, but the existing platforms were not uniformly even, making door-levelling a very delicate task.
The eight above-ground and at-grade stations include Heng Fa Chuen, Chai Wan, Kwai Fong, Kwai Hing, Tsuen Wan, Kowloon Bay, Ngau Tau Kok and Kwun Tong.

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