load on the platform structure. Also extensive waterproofing work is needed as many of these platforms are directly exposed to the elements. As of May 15, 2022, three stations on the East Rail Line (Hung Hom, Exhibition Centre, Admiralty) are equipped with platform screen doors, with the remaining stations to have installed these doors in the future. The platform screen doors presently in service in the MTR have been supplied by the Swiss manufacturer Kaba Gilgen, the Japanese Nabtesco Corporation (under the Nabco brand), the French Faiveley Transport and Shenzhen Fangda Automatic System. Apart from the MTR, all stations on the Hong Kong International Airport Automated People Mover are equipped with platform screen doors made from Westinghouse Platform Screen Doors (for Phase 1) and Panasonic (for Midfield Extension). The platforms for the shuttle bus service between the North Satellite Concourse and the East Hall of Terminal One at the HKIA, Chek Lap Kok, the New Territories and the bus platforms in Yue Man Square in Kwun Tong, New Kowloon are also retrofitted with PSDs. After it reopened on 27 August 2022, the Peak Tram was retrofitted with platform edge doors on the boarding side of the terminus stations. India On the Delhi Metro, all stations on the Delhi Airport Metro Express line, which links to Indira Gandhi International Airport have been equipped with full-height platform screen doors since November 2015 and the six busiest stations on the Yellow Line have also been equipped with half height platform gates. Automatic platform gates on all the stations of the Pink, Magenta Line and Grey Line. Platform screen doors are also used in all underground stations of the Chennai Metro. There are platform screen doors in all elevated stations of Kolkata Metro Line 2. Platform screen doors will be introduced in underground stations of Kolkata Metro Line 2, Kolkata Metro Line 3, Kolkata Metro Line 6. There are plans to install platform screen doors also in Kolkata Metro Line 1. All the stations of under-construction Hyderabad Airport Express Metro will have a provision of half-height platform screen doors (PSD) for improved passenger safety. On the Namma Metro in Bangalore, platform doors will be installed for its phase II operations and is expected to be completed by 2019. On the Mumbai Metro, all lines being made by MMRDA will have half-height platform screen doors on all elevated stations and full-height platform screen doors in