the , the , and the , Admiralty is heavily congested during rush hours. Admiralty and are the only cross-platform interchange stations on Hong Kong Island between lines serving it and Kowloon in the MTR system. It is also the only interchange station for the South Island line. Despite trains departing at capacity (every 2.1 minutes), commuters frequently have to board the second or even the third train when changing lines. The situation deteriorated following fare cuts following the MTR–KCR merger. Temporary measures are undertaken during peak hours, including the deployment of additional station assistants, adjustment of escalator directions and making pacifying announcements by local celebrities. During evening peak hours, some Tsuen Wan line trains are taken out of service at Central, and placed back into service at Admiralty, in order to relieve the demand at Admiralty. In the long term, the existing signalling system of Tsuen Wan line will be upgraded by Thales Transport & Security in 2018. In addition, the 2022 extension of the (from to Admiralty) has helped to divert some cross-harbour demand from the Tsuen Wan line, thereby reducing congestion. Station layout Admiralty station has a total of six underground floors; the uppermost (L1) floor has the fare control, lobby, shops, Customer Service Centre and other major facilities. On floor L2, passengers can access Platforms 4 (Tsuen Wan line to Central) and 3 (Island line to Chai Wan). One floor down, on level L3, are Platforms 2 (Island line to ) and 1 (Tsuen Wan line to Tsuen Wan). There are very wide passageways between the two platforms on each of floors L2 and L3; they are also curved platforms with trains going in opposite directions. The platforms are in the shape of a trapezium. Because all the platforms are curved, there are large stickers in front of the platform screen doors with "Mind the gap" text, which can only be found in this station. Passengers travelling from Eastern District and Wan Chai District can walk across to platform 1 to board the Tsuen Wan line trains bound for Kowloon, Kwai Chung and Tsuen Wan. Passengers travelling from Kowloon, Kwai Chung and Tsuen Wan can walk across and board the Island line trains bound for Chai Wan from platform 3. Entrances and exits Admiralty is part of the central business district of Hong Kong Island. There are many office buildings around the station. A major shopping