Southern Tier Line

The Southern Tier Line is a railroad line owned and operated by the Norfolk Southern Railway in the U.S. states of New York and Pennsylvania. The line runs from Binghamton, New York (was Suffern, New York) northwest to Buffalo, New York mostly along the former Erie Railroad main line. Suffern to Port Jervis is owned by Norfolk Southern, but it is not part of the Southern Tier Line anymore because it is leased to and maintained by Metro-North Railroad for its Port Jervis Line. Port Jervis to Binghamton is also owned by Norfolk Southern, but it is also not part of the Southern Tier Line anymore because it is leased to New York, Susquehanna and Western Railway. The Suffern to Binghamton trackage which is leased to Metro-North and NYSW was separated from the Southern Tier Line as of 2008.

From its east end in Binghamton to its former east end in Suffern, NS has trackage rights south on the New Jersey Transit Main and Bergen County Lines to Conrail's North Jersey Shared Assets Area; it junctions with the Lake Erie District at its west end. Along the way it meets the Corning Secondary at Corning, New York.

Suffern to Newburgh Junction in Woodbury, New York which was the oldest piece of the line, opened in 1841 as part of the New York and Erie Rail Road. Extensions opened to Port Jervis and Binghamton in 1848,Owego in 1849, and Dunkirk (leaving the Southern Tier Line at Hornell) in 1851. At the Buffalo end, the Attica and Buffalo Railroad opened from Buffalo east to Attica in 1842, but was part of the New York Central Railroad system until 1852, when it was sold to the Buffalo and New York City Railroad east of Depew. Also in 1852, the Buffalo and New York City Railroad built southeast from Attica to Hornell and west from Depew to Buffalo. The entire line became part of the Erie Railroad through leases and mergers.