The Northeast Corridor(NE) is an electrified railway line owned by Amtrak in the northeastern United States, running from Boston-Washington D.C via New York City, Philadelphia and Baltimore.
The corridor is used by many passenger and freight trains such as the high speed Acela Express , intercity trains and several long distance trains. Most of the corridor is often used by frequent commuter rail service such as the MBTA, Shore Line East , Metro-North Railroad, New Jersey Transit, SEPTA and MARC trains.
The corridor closely parallels I-95 for most of it's length, and is the buisiest passenger rail line in the United States as of 2013 for ridership and service frequency. Branches from Philadelphia-Harrisburg used by the Keystone Service and Pennsylvanian trains and the branch from New Haven, CT-Hartford, CT-Springfield, MA aren't considered part of the corridor.
Most of the line is built for speeds higher than 79 mph(127 km/hr) which is the rail speed limit in most US states. Amtrak can operate the Northeast Regional and the Keystone Service trains up to 125 mph(200 km/hr) and can operate the Acela Express up to 150 mph(240 km/hr) which is allowed in rural Massachusetts and Rhode Island. The Acela covers the 225 miles(363 km) between New York City and Washington D.C in 2 hours 45 minutes and the 230 miles(370 km) between New York City and Boston in just over 3 hours.
Amtrak has a $151 billion plan that in 2040, travel times will decrease to 38 min from New York City to Philadelphia, 1 hr 34 min from New York City to Washington D.C, 2 hr 18 min from Philadelphia to Boston and 1 hr 40 min from New York City to Boston.
The Northeast Corridor was built by several railroads from the 1830's-1917.
1. New York, New Haven and Hartford Railroad ( New York City-Boston )
2. Pennsylvania Railroad( New York City-Washington D.C)