Metro Rail is an urban rail system serving Los Angeles County, California. It consists of six lines, including two rapid transit subway lines (the Red and Purple lines) and four light rail lines (the Blue, Green, Gold and Expo lines) serving 80 stations. It connects with the Metro Liner bus rapid transit system (the Orange Line and Silver Line) and also with the Metrolink commuter rail system. Metro Rail, which had an average daily weekday ridership of 362,904 , is owned and operated by the Los Angeles County Metropolitan Transportation Authority (Metro) and started service in 1990. It has been extended significantly since that time and several further extensions are either in the works or being considered.