MD 355 (Frederick Road)

MD 355 (Frederick Road)
State	MD
Route	355
Name	Frederick Road
Direction a	South
Direction b	North
Terminus a	Washington, D.C.
Terminus b	Mount Airy

MD 355 (Frederick Road) is a major north–south highway in Maryland that connects Washington, D.C., Bethesda, Maryland, Rockville, Maryland, Gaithersburg, Maryland, Germantown, Maryland, Frederick, Maryland, and Mount Airy, Maryland. The route follows historic corridors used during the era of George Washington, the American Revolutionary War, and the antebellum period, and it now serves as a principal arterial for commuters accessing Interstate 270, Interstate 95, and suburban business districts such as Shady Grove. MD 355 intersects with federal routes including U.S. Route 29, U.S. Route 15, and former alignments of U.S. Route 240 while paralleling Maryland Route 28 and segments of the Baltimore and Ohio Railroad and the Capital Beltway.

Route description

The highway begins near the boundary with Washington, D.C. and proceeds through Bethesda, passing landmarks like National Institutes of Health, Walter Reed National Military Medical Center, Montgomery County Civic Center, and the Bethesda Metro Station. Continuing into Rockville, it skirts the Rockville Town Square, Montgomery County Circuit Courthouse, and crosses the Washington Metro Red Line corridor near Twinbrook Station. Northward into Gaithersburg and Germantown the road serves suburban nodes including Shady Grove Medical Center, Rio Lakefront Center, and the Watkins Mill High School area, intersecting with Maryland Route 117 and Maryland Route 200. In Frederick County, the route traverses communities such as New Market, Jefferson, and Ijamsville before terminating near Mount Airy, where it connects with U.S. Route 40 and Maryland Route 27. MD 355 runs adjacent to historic sites like the Monocacy National Battlefield and aligns near rail corridors historically operated by the Baltimore and Ohio Railroad and modern freight lines serving the Port of Baltimore.

History

MD 355 follows the corridor of the old Frederick Turnpike and sections of the National Road that were influential in the 18th and 19th centuries, used by figures such as Thomas Jefferson, James Madison, and other contemporaries traveling between Alexandria, Virginia and Frederick, Maryland. The alignment was formalized with the advent of numbered highways during the Good Roads Movement and early state highway programs associated with the Maryland State Roads Commission and later the Maryland Department of Transportation. In the 20th century, the corridor absorbed segments of the early U.S. Highway System tied to U.S. Route 240 and was modified during expansions related to Interstate 70 and Interstate 270. During the Suburbanization of the United States in the post-World War II era, the route was widened, realigned, and paralleled by commuter infrastructure linked to Washington Metropolitan Area Transit Authority planning, Federal-Aid Highway Act of 1956 projects, and regional growth tied to institutions like Johns Hopkins University Applied Physics Laboratory and federal installations such as Fort Detrick. Preservation efforts for adjacent historic districts involved agencies including the National Register of Historic Places and the Maryland Historical Trust.

Major intersections

The route intersects intermodal and major highway nodes that include crossings with I-270, I-495 (Capital Beltway), U.S. Route 29, U.S. Route 15, U.S. Route 40, and state routes such as Maryland Route 200 and Maryland Route 27. It links to commuter rail and rapid transit via connections near Rockville station (MARC) and Shady Grove station (WMATA), and provides access to federal complexes including National Institutes of Health and Walter Reed as well as regional airports like Montgomery County Airpark and intercity bus services at hubs linked to Union Station (Washington, D.C.) and Frederick Municipal Airport. The corridor also intersects local arterials serving downtowns such as Bethesda Row, Rockville Pike, and Frederick Historic District.

Auxiliary and related routes

Several auxiliary alignments, business routes, and former allocations relate to the corridor, including former alignments of U.S. Route 240 and connections to Maryland Route 27, Maryland Route 28, Maryland Route 117, and spurs serving commercial districts like Shady Grove Road and Montgomery Village Avenue. Freight and passenger rail lines operated historically by the Baltimore and Ohio Railroad and currently by CSX Transportation run parallel in sections, with multi-jurisdictional coordination involving Montgomery County, Frederick County, and the Maryland Department of Transportation State Highway Administration. Transit agencies such as Washington Metropolitan Area Transit Authority and MARC Train Service coordinate park-and-ride and bus rapid transit connections along the corridor.

Transportation and usage

MD 355 functions as a commuter corridor linking suburban employment centers, research campuses such as National Institutes of Health and Johns Hopkins University Applied Physics Laboratory, and commercial plazas including Germantown Town Center and Frederick Towne Mall areas. Traffic patterns reflect peak flows related to federal work schedules at NASA contractor facilities and to service demands generated by institutions like Montgomery College, Gallaudet University (via regional links), and health systems such as Kaiser Permanente and Adventist HealthCare. Freight movements connect to logistics hubs, the Port of Baltimore, and interstate corridors like I-95 and I-70, with modal transfers involving Amtrak and regional bus carriers including Greyhound Lines.

Future developments and improvements

Planned improvements involve capacity upgrades, complete street projects, and multimodal enhancements coordinated among Maryland Department of Transportation, Montgomery County Government, and Frederick County Government. Projects reference federal funding mechanisms under programs like the Infrastructure Investment and Jobs Act and partnerships with entities such as Maryland Transit Administration and local metropolitan planning organizations including the Metropolitan Washington Council of Governments. Proposals include intersection reconfigurations near Shady Grove, pedestrian and bicycle facilities tied to the Washington Bicycle Master Plan and regional trail initiatives like the C&O Canal National Historical Park connections, and transit-oriented development near Rockville Town Center and Gaithersburg METRO TOD sites.

Category:State highways in Maryland