Line 1 is a north-south line of the Shanghai Metro. It runs from Template:SHM stations in the north, via Template:SHM stations to Template:SHM stations in the south. The first line to open in the Shanghai Metro system, Line 1 serves many important points in Shanghai, including Template:SHM stations and Xujiahui. Due to the large number of important locations served, this line is extremely busy, with a daily ridership of over 1,000,000 passengers.[4] The line is colored red on system maps. Generally, the line runs at grade beside the Shanghai–Hangzhou railway in the south, underground in the city center and elevated on the second deck of the North–South Elevated Road in the North.
Template:SHM stations - Connects the metro with the main railway station in the city, allowing rail transport to and from other provinces. Virtual Interchange with Lines 3 and 4.
Template:SHM stations - This station serves a business and shopping area, and is also close to multiple tourist attractions making the station busy all day long. Interchange with Lines 2 and 8.
Template:SHM stations - This station is located at the sports stadium of the same name and the biggest regional and long distance bus station in the city. Interchange with Line 4.
Template:SHM stations - This station serves the second railway station of the city, which accommodates trains serving cities mainly to the south. Interchange with Line 3.
The first line in the system, Shanghai Metro was conceived and designed during 1980s, when fixed block signalling and track circuit based train control (TBTC) was still considered a state-of-art approach to automatic train operation. The signalling system was designed by CASCO, a signalling manufacturer owned jointly by China Railway Signal & Communication Group Corporation (CRSC) and General Railway Signal (GRS), and was largely based on the system designed by GRS for the Washington Metro. Coded audio-frequency (AF) track circuits are used for both train detection and transmission of speed commands, as well as limited train-to-wayside communication (TWC) for automatic train supervision (ATS). Train operation between stations and station stop can be automatic, while doors are controlled manually by train operators.[5][6]From 2013 to 2019, the system went through a wholesale renewal. Obsolete components as relay interlockings were replaced by modern microprocessor-based ones, but interfaces were kept unchanged. [7]As of 2020, the original design is expected to serve two additional decades.[8]
May 28, 1993 - The first 4.4 km (2.7 mi) long section of the line, from Xujiahui to Shanghai South Railway Station (formerly known as Xinlonghua), opens.
December 28, 1996 - Separate southern section from Jinjiang Park (formerly known as Hongmei Road South) to Xinzhuang opens. Northern extension continues to operate to Shanghai Railway Station.
July 1, 1997 - The northern and southern sections are connected, forming one complete line from Shanghai Railway Station - Xinzhuang.
December 28, 2004 - Line runs from Gongfu Xincun - Xinzhuang after northern extension opens.
December 29, 2007 - Second northern extension opens; full line runs from Fujin Road - Xinzhuang.