station remained a major stop for several of the PRR's leading east-west trains: Broadway Limited (Chicago-New York), Manhattan Limited (Chicago-New York); Penn Texas (St. Louis-New York) and Spirit of St. Louis (St. Louis-New York). By the late 1970s the Penn Central Corporation was accepting bids for the complex and it was purchased by the US General Services Administration. There were proposals in 1978 to make the structure into a federal office building, a new city hall and a senior citizens apartment building. Amtrak proposed that the whole structure remain a train station and rail offices. In 1974, the County Council proposed having the station be the site of the then-planned David L. Lawrence Convention Center. The Buncher Development Company had an option to buy the property as late as 1984. A $20 million restoration of Union Station began in 1986 to convert the office tower into apartments. It is now called The Pennsylvanian and opened to residents on May 23, 1988. The concourse, which is no longer open to the public, was transformed into a lobby for commercial spaces on the ground floor and the paint cleaned off the great central skylight. The rotunda, which once offered shelter for carriages to turn around, is now closed to vehicular traffic; modern cars and trucks are too heavy for the brick road surface and risk caving in the roof to the parking garage below it. Current passenger service Union Station continues to serve as an active railway station, but through an annex on the Liberty Avenue side of the building. It is the western terminus of Amtrak's Pennsylvanian route and is along the Capitol Limited route. Until 2005, Pittsburgh was also serviced by the Three Rivers (a replacement service for the Broadway Limited), an extended version of the Pennsylvanian that terminated in Chicago. Its cancellation marked the first time in Pittsburgh's railway history that the city was served by just two daily passenger trains (the Pennsylvanian and Capitol Limited). Architecture In September 1978, The New Yorker art critic Brendan Gill proclaimed that Pittsburgh's Penn Station is "one of the great pieces of Beaux-Arts architecture in America...[one of the] symbols of the nation." Bus rapid transit Penn Station is an at grade station operated by Pittsburgh Regional Transit. The station is located on the Martin Luther King Jr. East Busway and is served by busway routes P1, P2, P7, P10, P12, P16, P17,