The Shanghai Metro is the urban rapid transit system of China's largest city, Shanghai. The system incorporates both subway and light railway lines. It opened in 1995, making Shanghai the third city in Mainland China, after Beijing and Tianjin, to have a subway. Since then, the Shanghai Metro has become one of the newest and fastest-growing rapid transit systems in the world. Today, there are twelve metro lines (excluding the Shanghai Maglev Train), 268 stations and over 420 km of tracks in operation, making it the longest network in the world. Daily ridership averaged 3.56 million in 2009 and set a record of 7.548 million on October 22, 2010.
In the six months leading up to the opening of Expo 2010 on May 1, 2010, the Shanghai Metro has undergone major expansion with several new lines and extensions opening. The system is still growing, more new lines and extensions are under construction, and plans through 2020 project a system comprising 22 lines and 877 km of length.