for commuter rail through the RTA's Transit System Plan were moving forward. The corridors would include: The North-South Corridor connecting Edmond, Oklahoma City, Moore and Norman. The East Corridor from Tinker Air Force Base through Midwest City and Del City to downtown. The West Corridor from the Yukon area to downtown and serving fast-growing suburban neighborhoods in Western Oklahoma County and Canadian County. The Airport Corridor from Will Rogers World Airport to downtown. Passenger service Amtrak serves Oklahoma City via the Heartland Flyer, based out of the Art Deco Santa Fe train station in downtown. It has daily service to the satellite city of Norman and terminates at Fort Worth, Texas where passengers can transfer to the nation's rail network. There is currently a major push to expand the Heartland Flyer north into Kansas since the service has been guaranteed by recent state contributions. There is also a heritage rail line under re-construction that will connect Adventure District in NE Oklahoma City to downtown. The line likely would run from the Santa Fe train station through Bricktown and the Oklahoma Health Center through the Eastside to Adventure District attractions such as the Oklahoma City Zoological Park, Remington Park, and the National Cowboy and Western Heritage Museum. Santa Fe Station Union Station Freight lines Union Pacific and Burlington Northern Santa Fe are the major freight lines in the city. Bus Union Bus Station is the principal bus terminal in the state. It is located just east of downtown. Greyhound and several other regional and intercity bus companies serve Oklahoma City given its central location. Public transit Embark is the public transit provider with its new bus terminal downtown at NW 5th Street and Hudson Avenue. Embark has numerous routes, most of them being in the central inner city areas and commuter routes from the suburbs of Edmond and Norman to downtown. Metro's service is lacking in some respects, but there are plans to improve it through Metro's vision known as Fixed Guideway Study. Also part of the FGS, a new streetcar system known as the Oklahoma City Streetcar, which opened in December 2018, was completed under the city's MAPS 3 initiative. Served by modern, low-floor streetcars, the line connects the CBD with the other major downtown districts in the short term, with expansions proposed to Asia District and the NW Business District as well as the Oklahoma Health Center and Research