Luther King, Jr. Plaza which it shares with Amtrak. Barons Bus Lines also provides daily trips to Ann Arbor, Chicago, Cleveland, Detroit, Columbus, and Cincinnati . Toledo has various cab companies within its city limits and other ones that surround the metro. Airports Toledo Express Airport, located in the suburbs of Monclova and Swanton Townships, is the primary airport that serves the city. Additionally, Detroit Metropolitan Wayne County Airport is 45 miles north. Toledo Executive Airport (formerly Metcalf Field) is a general aviation airport southeast of Toledo near the I-280 and Ohio SR 795 interchange. Toledo Suburban Airport is another general aviation airport located in Lambertville, MI just north of the state border. Railroads at present Amtrak, the national passenger rail system, provides service to Toledo and other major cities under the Capitol Limited and the Lake Shore Limited. Both lines stop at Martin Luther King, Jr. Plaza, which was built as Central Union Terminal by the New York Central Railroad—along its Water Level Route—in 1950. Of the seven Ohio stations served by Amtrak, Toledo was the busiest in fiscal year 2011, boarding or detraining 66,413 passengers. Freight rail service presently in Toledo is operated by the Norfolk Southern Railway, CSX Transportation, Canadian National Railway, Ann Arbor Railroad, and Wheeling and Lake Erie Railway. All except the Wheeling have local terminals; the Wheeling operates into Toledo from the east through trackage rights on Norfolk Southern to connect with the Ann Arbor and CN railroads. Railroads in the past Historically, Toledo was a major rail hub where the New York Central (later, the Penn Central), Baltimore and Ohio, Wabash Railroad, Nickel Plate Road, Ann Arbor Railroad, Detroit, Toledo and Ironton Railroad, Toledo, Peoria and Western Railway, Pennsylvania Railroad, Chesapeake and Ohio Railway/Pere Marquette Railway, Wheeling and Lake Erie railroads moved a large amount of freight to and from Toledo's many industries such as Libbey-Owens-Ford Glass, and Willys-Overland (Jeep) Motors. Most of these companies used Central Union Terminal on Emerald Avenue. The Ann Arbor Railroad used its station on Cherry Street. The Pennsylvania Railroad used its station on Summit Street. Interurbans Toledo had a streetcar system and interurban railways linking it to other nearby towns but these are no longer in existence. Seven interurban companies radiated from Toledo. In the early 1930s, three of the seven, the Cincinnati and Lake Erie from Cincinnati, Columbus, Dayton, and Springfield, the Lake Shore Electric from