"Twelfth five-year" period, the city constantly improve comprehensive transportation network system construction, urban public transport infrastructure total investment 191.89 billion yuan, the rail transit infrastructure investment accounted for the proportion of the city's public transportation infrastructure investment to maintain at around 90%. In 2015, the city's rail transit investment reached 33.17 billion yuan, accounting for 88.7%. By the end of 2015, the city's rail transit lines reached 18, operating mileage of 554 kilometers, covering 11 municipal district. As the investment increase, the city rail transit great-leap-forward development, network operation pattern basic formation.  

Metro officially began in 1971, Beijing urban rail transit has experienced from scratch, since the childhood, from line to network the development process of nearly 50 years. Especially in 2007, the zhuhai "three-ring, four radiation" five vertical and seven horizontal, planning out since Beijing rail transit to achieve "leapfrog" big development, constantly increasing at a speed of 51.5 kilometers per year on average. Rail transit mileage from the original 23.6 km to 100 km in 34 years, from 100 km to 500 km in just 11 years. Once the lonely subway, now to knit as nets, convenient, has formed the network operation pattern.  

Rail transit passenger rapid ascension, and the first super public charge passenger traffic, rail transit travel become residents' travel important way. With the constant improvement of Beijing rail transit network, the city's rapid rail transit passenger traffic growth, growth in 1978 from 1978 to 2015 in 3.32 billion, increased 107.4 times. A quarter of 2016, the city's rail transit passenger traffic of 818 million person-time, than rose 14.8% from a year earlier, faster than public charge 25.8% higher passenger traffic. Nearly 9 million person-time, average daily passenger traffic than public charge passengers 12000 passengers. Public electric car passenger rail transit passenger Numbers for the first time, has become an important approach to urban commuter.  

According to the second stage of the Beijing urban rail transit construction planning (2015 ~ 2021), the city urban rail transit line network will reach 30, 2020, a total length of 1177 km, rail transportation accounts for the proportion of public transportation volume will reach 62%.