Penn Line

Penn Line
A Penn Line train at Odenton station
Overview
Owner	Maryland Transit Administration
Locale	Washington, D.C., and Maryland suburbs east; Baltimore and suburbs northeast
Termini	Washington, D.C. Union Station Perryville, MD
Stations	13
Service
Type	Commuter rail
System	MARC Train
Train number(s)	400–499, 502–579, 610–698
Operator(s)	Amtrak (under contract)
Daily ridership	24,267[1]
History
Opened	1881
Technical
Line length	77 mi (124 km)
Track gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Electrification	Overhead line, 12 kV 25 Hz AC
Operating speed	44 mph (71 km/h) (avg.) 125 mph (201 km/h) (top)
Route map Penn Line highlighted in red Show interactive map Legend Wilmington/Newark Line to Temple University Amtrak Newark (proposed) DE MD Elkton (proposed) Perryville Susquehanna River Aberdeen Bush River Edgewood Gunpowder River Martin State Airport Back River Union Tunnel Penn Station B&P Tunnel West Baltimore Frederick Road closed 1984 Halethorpe Camden Line to Camden Station Patapsco River BWI Airport Odenton Bowie State Bowie Seabrook Lanham closed 1982 Capital Beltway closed New Carrollton Landover closed 1982 MD DC Anacostia River Camden Line Brunswick Line to Martinsburg or Frederick Union Station Virginia Railway Express Amtrak This diagram: view talk edit Show route diagram

The Penn Line is a MARC passenger rail service operating between Union Station in Washington, D.C., and Perryville, Maryland, along the far southern leg of the Northeast Corridor; most trains terminate at Baltimore's Penn Station. It is MARC's only electrified line, though a majority of trains remain diesel powered. With trains operating at speeds of up to 125 miles per hour (201 km/h), it is the fastest commuter rail line in the United States.^[2] The service is operated by Amtrak under contract to the Maryland Transit Administration. MARC sets the schedules, owns most of the stations, and controls fares, while Amtrak owns and maintains the right-of-way, supplies employees to operate trains, and maintains the rolling stock. It is the busiest of MARC's three lines, with twice as many trains and riders as the Brunswick and Camden lines combined.

The Penn Line is the successor to commuter services between Washington and Baltimore provided by the Pennsylvania Railroad, Penn Central, and Conrail dating back as early as 1881. Additionally, Amtrak operated a commuter service named the Chesapeake from Washington to Suburban Station in Philadelphia between 1978 and 1983.^[3]

In 1983, Maryland, along with a number of other Northeastern states, took control of its commuter railroads. Amtrak, which had acquired the right-of-way from Penn Central, took over operation of the former Pennsylvania Railroad commuter line, which was rebranded as AMDOT (Amtrak/Maryland Department of Transportation).^[4] The Amtrak Chesapeake was discontinued later in 1983 due to low ridership and redundancy with AMDOT; a year later, all commuter rail service in Maryland was merged under the MARC brand.

With frequent MARC and Amtrak service, the Washington-Baltimore section of the Northeast Corridor is one of the busiest rail lines in the United States.