CAT and the Modern Transit Partnership began discussing a second commuter rail corridor in 2009, designated Corridor Two. Corridor Two would operate between York, Harrisburg, and Lebanon. There may be difficulties implementing the Harrisburg-Lebanon segment of CorridorTwo, as this segment would operate on the heavily traveled and fast-growing Norfolk Southern Harrisburg Line, an east–west trunk line in Norfolk Southern's freight rail system. Norfolk Southern has discussed upgrading and potentially expanding capacity of the Harrisburg-Lebanon segment of their system for freight rail operations as part of their Crescent Corridor initiative between the U.S. Gulf Coast and northern New Jersey.RAIL Solution's Response to Norfolk Southern Railway's "I-81 Crescent Corridor" Initiative Rail Solution, accessed February 5, 2010.
