stations Before the COVID-19 pandemic, Airport Express services operated every 10 minutes from the start of service (05:54 from Airport and 05:50 from Hong Kong) and every 12 minutes from 23:28 (from Airport) and 00:00 (from Hong Kong) until the last service 00:48. Train service is currently reduced until further notice as patronage has not yet recovered. As of Nov 5, 2022, train service is every 15-20 minutes all day. The Airport Express, along with other MTR metro lines, is monitored by the Operations Control Centre in Tsing Yi. Rolling stock The Airport Express is served by 11 CAF-Stock trains built and assembled by Construcciones y Auxiliar de Ferrocarriles in Spain while Adtranz contributed control and traction equipment. These trains were made up of seven cars until 2003. To cope with the extra traffic demand derived from the opening of AsiaWorld-Expo station, an additional car was added to each train to form a total of eight cars. If future demand increases, trains on the AEL are capable of running with ten cars. In service, the trains travel at a maximum speed of . The train interiors saw their first refurbishment in 2008, after ten years in service. The grey seat covers were replaced with purple and green ones, and a new indigo carpet was installed. The interior was updated yet again in 2020, and new seat covers featuring the blue and aquamarine AEL logos and a grey wave pattern will be paired with synthetic leather head rests. Stations This is a list of the stations on the Airport Express line. List Use in media In late 1998, Leon Lai showed a music video of MTR's Airport Express line for the song "Happy 2000", which includes the interior of the A-Train. Design limitations When British Hong Kong was planning to build the Airport Railway (Tung Chung line and Airport Express) in the 1990s, which was a few years before the handover to China, the Chinese government raised concerns about the effect of the project on the territory's fiscal reserves, which eventually forced the Hong Kong government to reduce the cost of the Airport Railway. The resulting changes made to the design imposed limitations on the level of service on the line. The airport rail link was originally designed to accommodate four tracks, two each for the Airport Express and Tung Chung line. It was later reduced to two tracks where both