<P> This list of metro systems includes electrified rapid transit train systems worldwide . In some cases , metro systems are referred to as subways , U-Bahns or undergrounds . As of October 2014 , 157 cities in 55 countries around the world host the approximately 160 metro systems that are listed here . The London Underground first opened as an `` underground railway '' in 1863 and its first electrified underground line opened in 1890 , making it the world 's first metro system . The metro system with the longest route length is the Shanghai Metro ; the busiest one is the Beijing Subway ; and the one with the most stations is the New York City Subway . </P>
<P> This list of metro systems includes electrified rapid transit train systems worldwide . In some cases , metro systems are referred to as subways , U-Bahns or undergrounds . As of October 2014 , 157 cities in 55 countries around the world host the approximately 160 metro systems that are listed here . The London Underground first opened as an `` underground railway '' in 1863 and its first electrified underground line opened in 1890 , making it the world 's first metro system . The metro system with the longest route length is the Shanghai Metro ; the busiest one is the Beijing Subway ; and the one with the most stations is the New York City Subway . </P>
when was first metro train started in world
when was first metro train started in world
1890
1890