Maryland Route 648

Maryland Route 648
State	MD
Route	648
Type	MD
Length mi	(varies by segment)
Maint	MDSHA
Direction a	South
Terminus a	Washington, D.C.
Direction b	North
Terminus b	Baltimore County, Maryland
Counties	Montgomery County, Prince George's County, Anne Arundel County, Baltimore County

Maryland Route 648 is a state-numbered collection of discontiguous highway segments on the western side of the Chesapeake Bay region that follow the historic alignment of U.S. Route 1 through suburban and urban communities between Washington, D.C. and Baltimore. The route serves as an alternate local arterial to modern limited-access corridors, linking neighborhoods, commercial districts, transit nodes, and historic districts in Montgomery County, Prince George's County, Anne Arundel County, and Baltimore County.

Route description

Maryland Route 648 comprises several named sections—often known locally as Baltimore Avenue, Howard Avenue, Baltimore Boulevard, and Johns Hopkins Road—that trace the pre-1950s alignment of U.S. Route 1 through communities such as College Park, Laurel, Elkridge, Arbutus, and parts of Baltimore City. As a surface arterial the route intersects multiple state and federal facilities including Interstate 95, Baltimore–Washington Parkway, U.S. Route 1, and numerous state highways. Long stretches parallel commuter rail corridors like MARC Train lines and are adjacent to major universities, notably University of Maryland and service nodes such as BWI Marshall Airport. The corridor transitions from two-lane neighborhood streets to four-lane commercial boulevards, serving local traffic, bus services including MTA Maryland routes, and bicycle and pedestrian facilities near transit-oriented developments such as New Carrollton station and Greenbelt station.

History

The roadway that became Maryland Route 648 developed from colonial-era roads connecting Baltimore, Annapolis, and the emerging federal city at Washington, D.C.. In the early 20th century the alignment formed part of the original U.S. Highway System, designated as sections of U.S. Route 1 and improved under statewide programs influenced by figures like Harry F. Byrd's era infrastructure policy and New Deal-era public works initiatives. Postwar suburbanization driven by GI Bill homeownership and federal highway investment prompted construction of limited-access alternatives—most notably Baltimore–Washington Parkway and expanded segments of Interstate 95—which led the Maryland State Highway Administration to reassign the old U.S. 1 alignments as state routes designated with numeric suffices including the 648 series. Over subsequent decades, agencies including Maryland Department of Transportation and local governments undertook reconstruction, streetscape projects, and traffic-calming measures influenced by urbanists associated with Jane Jacobs-era thinking and federal transit grants. Preservation efforts in historic districts along the corridor have involved stakeholders such as Historic Annapolis advocates and municipal planning boards in Prince George's County.

Major intersections

Major junctions on the various segments include crossings and interchanges with nationally and regionally significant routes and nodes: U.S. Route 1, Interstate 95, I-495/95 Beltway, Baltimore–Washington Parkway, Maryland Route 32, Maryland Route 295, and direct connections to commuter rail and transit hubs like New Carrollton station and BWI Rail Station. Within municipal limits intersections serve commercial corridors and link to municipal streets named for figures such as Charles County notables and local institutions like Towson University and branch campuses of UMBC.

Auxiliary routes

Several short spur and connector designations associated with the primary 648 corridors exist to serve ramps, old alignments, and frontage streets. These include minor state-maintained segments that provide access between mainline Route 648 sections and higher-capacity highways, linking to local collectors that feed neighborhoods around transit centers such as Greenbelt and College Park–University of Maryland station. Maintenance and numbering adjustments over time reflect actions by Maryland State Highway Administration to rationalize control of former federal alignments and to coordinate jurisdictional transfers with county governments including Anne Arundel County and Baltimore County.

Traffic and maintenance

Traffic volumes vary widely: urban segments adjacent to Baltimore and Washington, D.C. display high peak congestion influenced by commuter peak periods and access to employment centers, federal agencies, and institutions like National Institutes of Health and National Archives and Records Administration in the broader region. Rural and suburban stretches exhibit lower average daily traffic but serve vital local functions. Maintenance responsibility rests largely with the Maryland State Highway Administration, which schedules resurfacing, signal modernization, ADA-compliant upgrades, stormwater management projects under state environmental compliance influenced by Chesapeake Bay Program goals, and multimodal improvements funded in part by federal highway and transit grants administered through Federal Highway Administration and Federal Transit Administration programs.

Cultural and notable features

The route passes historic sites, civic institutions, and cultural amenities associated with regional history including antebellum and early republican-era architecture, preserved downtowns like Laurel Historic District, and campuses such as University of Maryland, College Park. Public art, veterans memorials, and locally significant commercial corridors front the route in communities tied to aviation history near BWI Marshall Airport and rail history linked to the Baltimore and Ohio Railroad. The roadway figures in local transportation planning debates, neighborhood preservation efforts, and community festivals organized by municipalities like Ellicott City-area groups and county historical societies.

Category:State highways in Maryland