MD 408

MD 408
State	Maryland
Type	MD
Route	408
Direction a	West
Direction b	East
Counties	Prince George's County, Anne Arundel County

MD 408.

MD 408 is a state highway in Maryland running through Prince George's County, Anne Arundel County, and serving communities near Washington, D.C., College Park, Maryland, Bowie, Maryland, Largo, Maryland, and Annapolis, Maryland. The route functions as a regional connector between suburban nodes and intersects major corridors such as U.S. Route 1, U.S. Route 50, and Maryland Route 3. It supports commuter, commercial, and local traffic and parallels segments of historic alignments that trace early 20th‑century road improvements associated with statewide planning efforts involving the Maryland State Roads Commission and regional projects tied to the growth of Baltimore and the National Capital Region.

Route description

The highway begins near suburban areas adjacent to Washington Metro service and proceeds eastward through residential and commercial zones, linking neighborhoods served by stations on the Green Line (Washington Metro) and roadways leading to Joint Base Andrews. Along its course MD 408 intersects arterial routes that provide direct access to Interstate 495 (Capital Beltway), Interstate 95, and the Baltimore–Washington Parkway (MD 295), creating multimodal connections to hubs such as Reagan National Airport, Baltimore/Washington International Thurgood Marshall Airport, and the Port of Baltimore. The corridor passes near municipal centers including Upper Marlboro, Glenarden, and Severn, and crosses waterways draining to the Patuxent River and Severn River, with bridges and culverts originally designed to standards influenced by projects undertaken by the U.S. Army Corps of Engineers and state transportation planners like those from the Maryland Department of Transportation. Land use along the route transitions from high‑density retail nodes adjacent to U.S. Route 1 Business (Baltimore–Valley), through institutional zones near campuses such as University of Maryland, College Park and medical complexes linked to Children's National Hospital, into lower‑density suburbs approaching the Chesapeake Bay shoreline corridors.

History

The roadway traces corridors improved during the early automobile era, when the Maryland State Roads Commission pursued numbered highways to link population centers such as Washington, D.C. and Annapolis. Freight and passenger traffic growth during the interwar years, influenced by policies from the Federal Highway Administration precursor agencies and local planners from counties including Prince George's County and Anne Arundel County, led to upgrades, paving, and realignments. Post‑World War II suburban expansion associated with developments like New Carrollton and Bowie State University accelerated traffic demands, prompting intersection reconstructions and interchange work coordinated with projects such as U.S. Route 50 reconstruction and improvements tied to the Capital Beltway program. In subsequent decades, rehabilitation efforts funded via state bonds and federal aid addressed pavement deterioration, stormwater management issues influenced by rulings from agencies like the Environmental Protection Agency, and safety enhancements recommended by consultants who previously worked on corridors including MD 3 and MD 450.

Major intersections

Major junctions along the corridor provide connections to principal routes and facilities. Notable intersections include crossings or interchanges with U.S. Route 1, U.S. Route 50, Maryland Route 3, Maryland Route 450, and ramps serving Interstate 495 (Capital Beltway). These nodes facilitate access to regional destinations such as Annapolis Naval Station, National Harbor, Fort George G. Meade, and commuter centers serving corridors toward Baltimore and Washington, D.C.. Adjacent arterial crossings link to municipal streets providing direct approaches to historic sites such as Historic Annapolis and institutional campuses including Gallaudet University satellite facilities.

Maintenance and jurisdiction

Responsibility for roadway upkeep falls primarily to the Maryland Department of Transportation and its administration through the State Highway Administration, with coordination from county public works departments in Prince George's County and Anne Arundel County for local access management, traffic signal timing, and pedestrian facilities. Bridge inspections and structural repairs follow protocols aligned with standards from the Federal Highway Administration and inspection guidance influenced by reports from the American Association of State Highway and Transportation Officials. Snow removal, striping, and vegetation management are conducted seasonally, with specialized projects sometimes funded through federal programs administered by offices such as the U.S. Department of Transportation.

Future developments and improvements

Planned improvements emphasize capacity, safety, and multimodal access, reflecting priorities in regional transportation plans adopted by bodies such as the Metropolitan Washington Council of Governments and county transportation planning divisions. Proposed projects may include intersection reconfigurations, signal upgrades coordinated with Washington Metropolitan Area Transit Authority schedules, bicycle and pedestrian enhancements aligned with National Complete Streets Coalition best practices, and stormwater retrofits influenced by Chesapeake Bay Program goals. Funding strategies could draw on state capital programs, federal grants from the Federal Transit Administration, and local bonds approved by county councils.

Auxiliary and related routes

The corridor is associated with spur and connector links to nearby numbered highways including state routes serving Largo Town Center, New Carrollton transit hubs, and collector roads providing access to installations such as Joint Base Andrews and Fort Meade. Related corridors include Maryland Route 3 Business alignments, historic alignments that paralleled early turnpikes, and frontage roads that support park‑and‑ride facilities tied to commuter rail and bus services operated by agencies like MTA Maryland and the Washington Metropolitan Area Transit Authority.

Category:State highways in Maryland