FasTracks is a commuter rail, light rail, and bus expansion project approved by voters in 2004, which will serve neighboring suburbs and communities. The W Line, or West line, opened in April 2013 serving Golden/Federal Center. The commuter rail A Line from Denver Union Station to Denver International Airport opened in April 2016 with ridership exceeding RTD's early expectations. The light rail R Line through Aurora opened in February 2017. The G Line to the suburb of Arvada opened on April 26, 2019 after being originally planned to open in the Fall of 2016. The N Line to Commerce City and Thornton opened on September 21, 2020.