Baltimore

====Intercity rail====
[[File:Baltimore Pennsylvania Station corrected.jpg|thumb|[[Pennsylvania Station (Baltimore)|Baltimore Pennsylvania Station]] in Baltimore, the seventh-busiest rail station in the nation]]
Baltimore is a top destination for [[Amtrak]] along the [[Northeast Corridor]]. Baltimore's [[Pennsylvania Station (Baltimore)|Penn Station]] is one of the busiest in the country. As of 2014, Penn Station was ranked the [[List of busiest Amtrak stations|seventh-busiest]] rail station in the [[United States]] by number of passengers served each year.<ref name="Fact Sheet">{{cite web |title=Amtrak Fact Sheet, Fiscal Year 2014 State of Maryland |publisher=[[Amtrak]] Government Affairs |date=November 2014 |url=http://www.amtrak.com/pdf/factsheets/MARYLAND14.pdf |access-date=May 6, 2015 |url-status=dead |archive-url=https://web.archive.org/web/20150126202551/http://www.amtrak.com/pdf/factsheets/MARYLAND14.pdf |archive-date=January 26, 2015 }}</ref> The building sits on a raised "island" of sorts between two open trenches, one for the Jones Falls Expressway and the other for the tracks of the Northeast Corridor (NEC). The NEC approaches from the south through the two-track, {{Convert|7660|ft}} [[Baltimore and Potomac Tunnel]], which opened in 1873 and whose {{convert|30|mph|abbr=on|-1}} limit, sharp curves, and steep grades make it one of the NEC's worst bottlenecks. The NEC's northern approach is the 1873 [[Union Tunnel (Baltimore)|Union Tunnel]], which has one [[single track (rail)|single-track]] bore and one [[double track|double-track]] bore.

Just outside the city, [[BWI Rail Station|Baltimore/Washington International (BWI) Thurgood Marshall Airport Rail Station]] is another stop. Amtrak's ''[[Acela Express]]'', ''[[Palmetto (train)|Palmetto]]'', ''[[Carolinian (train)|Carolinian]]'', ''[[Silver Star (Amtrak train)|Silver Star]]'', ''[[Silver Meteor]]'', ''[[Vermonter (train)|Vermonter]]'', ''[[Crescent (train)|Crescent]]'', and ''[[Northeast Regional]]'' trains are the scheduled passenger train services that stop in the city. [[MARC Train|MARC]] commuter rail service connects the city's two main intercity rail stations, Camden Station and Penn Station, with Washington, D.C.'s [[Union Station (Washington, D.C.)|Union Station]] as well as stops in between. The MARC consists of 3 lines; the Brunswick, Camden and Penn. On December 7, 2013, the Penn Line began weekend service.<ref>{{cite news | url=https://articles.washingtonpost.com/2013-09-04/local/41740904_1_weekend-service-penn-line-rafi-guroian | newspaper=The Washington Post | first1=John | last1=Wagner | first2=Dana | last2=Hedgpeth | title=Weekend MARC trains between D.C. and Baltimore will start Dec. 7, O'Malley announces | date=September 5, 2013 | archive-url=https://web.archive.org/web/20131118204549/http://articles.washingtonpost.com/2013-09-04/local/41740904_1_weekend-service-penn-line-rafi-guroian | archive-date=November 18, 2013 }}</ref>