North Island Line
North Island Line is a proposed reformation of the existing Island Line and extension of Tung Chung Line of the Hong Kong MTR metro system. According to the documentary - Rail Projects Under Planning 2000 released by Highways Department, the current Tung Chung Line will be extended from Hong Kong terminus eastward and two new stations, Tarmar Station and Exhibition Station are proposed on the extension. The new route will then join and substitute the Island Line from Fortress Hill Station to Chai Wan terminus. Tseung Kwan O Line will have new constructed tunnel connected from its North Point terminus to Tin Hau Station without passing Fortress Hill Station and substitute the remaining western half of Island Line. The difficulty of constructing North Island Line includes updating the signalling apparatus of Island Line to be compatible with which has been installed in Tung Chung Line.
The extension of Tung Chung Line involved in the land reclamation of Victoria Harbour Phase III of Hong Kong Island northern coast. Due to the disagreement from public and political party such as Society for Protection of the Harbour and the insufficient traffic demand, MTR Corporation has never given the proposal a commencing date. To add the infirm factor, the proposed Shatin to Central Link and the possible merge of MTRC and KCRC also influence the fate of North Island Line. For various forementioned reasons, in 2003 Hong Kong Government has postponed the study to 2016.