Charlotte Air-Line Railway, part of the Southern Railway Atlanta and Richmond Air-Line Railway, part of the Southern Railway Auburn and Deposit Air Line Railroad in New York (never built) Baraboo Air Line Railroad, part of the Chicago and North Western Railway Birmingham and Atlanta Air-Line Railroad, part of the Seaboard Air Line Railroad Boston and New York Air-Line Railroad, part of the New York, New Haven and Hartford Railroad Canada Air-Line Railway, part of the Grand Trunk Railway Chicago and Indiana Air Line Railway, part of the South Shore Line Chicago and Indianapolis Air-Line Railroad, part of the Chicago, Indianapolis and Louisville Railroad Chicago-New York Electric Air Line Railroad. Less than 50 km (30 miles) was built and is still used as an interurban eastwards from Chicago, Illinois Chicago and Northern Pacific Air-Line Railroad and Chicago and Northern Pacific Air-Line Railway, part of the Chicago and North Western Railway Cincinnati and Chicago Air-Line Railroad, part of the Pennsylvania Railroad Clinton Air Line Railroad, 1850s proposed railroad, graded but never laid with tracks, would have run from Hudson, OH to Tiffin, OH Dixon Air Line Railroad, part of the Chicago and North Western Railway Eastern and Western Air Line Railway, defunct narrow gauge road in northwest Ohio Elberton Air Line Railroad, part of the Southern Railway Eufaula and St. Andrews Bay Air-line Railroad in Florida (never built) Fargo and St. Louis Air Line Railway, part of the Chicago, Milwaukee, St. Paul and Pacific Railroad Georgia Air Line Railroad, part of the Southern Railway Kansas City and Independence Air Line Railroad, part of the Kansas City Southern Railway Le Roy and Caney Valley Air Line Railway, part of the Missouri Pacific Railroad Long Island Railroad, formerly a subsidiary of the Pennsylvania Railroad; especially the Ronkonkoma and Babylon Branches; track routes established before the suburban development of Long Island Louisville, New Albany and St. Louis Air-Line Railway, part of the Southern Railway Macon and Florida Air Line Railroad, part of the Southern Railway Michigan Air-Line Railroad and Michigan Air-Line Railway, part of the New York Central Railroad and Grand Trunk Railway Milltown Air Line Railway, a logging railroad in Georgia Montreal and Boston Air Line, a marketing name used by the Boston and Lowell Railroad National Air Line Railroad New Albany and St. Louis Air Line Railway, part of the Southern Railway New York and Boston Air Line Railroad, part of the New