National Harbor–Alexandria Line

The NH2 was created as a plot route on October 23, 2016 due to high demand. The route would be a plot for nine months and if successful, the NH2 would become a permanent route in 2017. The route is funded by National Harbor developer Peterson Companies, the City of Alexandria, Fairfax County and the Maryland Department of Transportation in a unique public/private partnership. The route has since become permanent by July 2017.[2]

The NH2 operates between 5:00 AM with the last bus leaving at 1:55 AM every 30 minutes. The NH2 operates buses out of Shepherd Parkway division.

On October 23, 2016, WMATA implemented the NH2 as a nine-month test plot due to high demand.[11][12] The NH2 is the first route to provide service across the reconstructed Woodrow Wilson Bridge, the first route since the former N11 & N13 that ran between King Street station and Branch Avenue/Suitland stations that were discontinued on June 26, 2004.[13]

Prior to the NH2, passengers would have to travel via the Yellow Line to L'Enfant Plaza station. Then they'll have to transfer onto a Branch Avenue bound Green Line train to Southern Avenue station to catch the NH1.[2] Passengers can use the NH2 without having to travel through Washington, D.C. and instead travel via the Bridge. Before the NH2 came into service, National Harbor only had two bus routes heading into National Harbor. Besides the already running NH1, National Harbor also had TheBus 35 and 35S. However the 35 would only serve Gaylord Hotel while the 35S would only operate Weekdays only and only have a total of six trips (3 in the morning and 3 in the afternoon between 9:00-3:20 only running every hour and 15 minutes). National Harbor used to have Metrobus NH3 which would be replaced by the NH1 when it was rerouted back to Southern Ave.

With the introduction of the NH2, the route will fill the demand from passengers running in Alexandria Virginia to National Harbor.[14]

Beginning on September 9, 2018, the St George Blvd & Waterfront St bus stop in National Harbor was discontinued and the NH2 along with the NH1 were rerouted to follow straight on National Harbor Blvd, turn right on Waterfront Street, and make a right turn onto St. George Blvd where it'll serve its current stop at Waterfront St & Potomac Passage. The reason WMATA made the reroute was since of traffic congestion along Downtown National Harbor (Waterfront St) and wanted to offer customers a more efficient trip. However it meant that both the NH1 & NH2 only served one stop at National Harbor.[15]

During WMATA's 2020 Fiscal Year budget, it was proposed for the NH2 to be shorten to King Street–Old Town station only and discontinue service to Huntington station as it overlaps both the Yellow Line and the Richmond Highway Express. However the frequency for buses will decrease from 30 to 40 minutes everyday with post-midnight trips being eliminated.[16]

In response to the COVID-19 pandemic, route NH2 was temporarily suspended on June 28, 2020. This was because the NH2 had low ridership following reduced service, and low demand at National Harbor.[17] WMATA announced to restore the NH2 service on August 23, 2020 as part of the Metro's COVID-19 Recovery Plan, with some minor changes of the route. Service between King Street–Old Town station and Huntington station was eliminated as the NH2 overlaps with the Yellow Line and Richmond Highway Express.[18] Although, the NH2 will still serve Eisenhower Avenue station following these changes.

On September 10, 2020 as part of its FY2022 proposed budget, WMATA proposed to eliminate all weekend route NH2 service in order to reduce costs and low federal funds.[19] Route NH2 has not operated on weekends since March 21, 2020 due to Metro's response to the COVID-19 pandemic.[20]