Due to the wide availability of the Northeast Regional, Keystone Service, and Acela Express, as well as commuter rail, most long- and medium-haul trains operating along the New York-Washington leg of the NEC do not allow local travel between NEC stations. In most cases, long- and medium-haul trains only stop to discharge passengers from Washington (and in some cases, Alexandria) northward, and to receive passengers from Newark to Washington. This policy is intended to keep seats available for passengers making longer trips. The Vermonter and Palmetto are the only medium- and long-haul trains that allow local travel in both directions between New York and Washington. The southbound Carolinian allows local travel daily, while the northbound Carolinian only allows local travel on Sundays, Thursdays, and Fridays. Additionally, the medium-haul Pennsylvanian allows local NEC travel, but this train leaves the corridor in Philadelphia and does not travel all the way to Washington.
