MD 97 (Maryland)

MD 97 (Maryland) is a state highway in the U.S. state of Maryland running north–south from the boundary with Washington, D.C. near New Hampshire Avenue to the Pennsylvania state line where it continues as Pennsylvania Route 97. The route connects suburbs and exurbs including Silver Spring, Columbia, Cooksville, and Westminster and serves as a link between I-95, US 29, and I-70. MD 97 carries suburban commuter, commercial, and intercity traffic across Prince George's County, Montgomery County, Howard County, and Carroll County.

Route description

MD 97 begins at the District of Columbia–Maryland border near New Hampshire Avenue and proceeds north as a multi-lane arterial through the Silver Spring area, intersecting US 29 and providing access to White Oak and FDA facilities. The highway becomes a divided highway near Colesville and continues toward North Bethesda and Germantown suburbs, crossing major corridors such as I-495 and connecting to MD 200 (Intercounty Connector) in the corridor linking Montgomery County employment centers. Northward, MD 97 serves Wheaton and passes near Howard County General Hospital as it traverses Howard County farmland and suburban nodes like Columbia and Cooksville. Approaching Carroll County, the route intersects US 40 and I-70 at interchanges that tie into the National Highway System, then continues through Westminster before reaching the Pennsylvania border and transitioning to Pennsylvania Route 97.

History

The MD 97 corridor follows historic alignments used since the 19th century between Washington, D.C. and communities in northern Maryland. Early 20th-century improvements were undertaken during the era of the Good Roads Movement and financed alongside state initiatives such as the Maryland State Roads Commission. Designation as a numbered highway took place in the 1920s as part of statewide numbering reforms that paralleled U.S. Highway System developments. Subsequent decades saw realignments and upgrades in response to suburbanization linked to projects like the construction of I-95 and the expansion of WMATA service, accelerating commuter traffic through Prince George's County and Montgomery County. In the postwar period, bypasses and divided highway conversions were built near growth centers including Columbia—a planned community initiated by James Rouse and the Rouse Company—and corridors near Westminster were modernized to meet Interstate-era standards. More recent projects have included interchange construction with I-70 and safety improvements funded by the Maryland Department of Transportation to address collision patterns and capacity constraints associated with suburban growth.

Major intersections

MD 97 intersects a number of principal highways and municipal routes that link regional centers and interstate corridors. Key intersections include its southern terminus at the District of Columbia–Maryland border near New Hampshire Avenue, junctions with US 29 (columbia pike), the Capital Beltway (I-495), connections to MD 200, an interchange with I-95 via collector routes, crossings with US 40 and an interchange with I-70 near Westminster, and the northern transition to Pennsylvania Route 97 at the Pennsylvania state line.

Traffic and usage

MD 97 carries high-volume commuter flows between Washington, D.C. suburbs — including Silver Spring, North Bethesda, and Columbia — and employment hubs such as downtown Washington, D.C., research complexes near Bethesda, and distribution centers in Howard County. Traffic counts reflect peak period congestion influenced by regional development patterns tied to projects like MD 200 and rail transit expansions by WMATA and MTA. Freight and long-distance travel use the corridor to access I-70 and I-95, linking to interstate commerce routes such as the Pennsylvania Turnpike and northeastern corridors serving Baltimore and Philadelphia. Safety analyses by the Maryland State Police and MDOT have guided signal timing, turning-lane additions, and shoulder improvements.

Future and planned improvements

Planned improvements on the MD 97 corridor have been proposed by the Maryland Department of Transportation and county agencies to address capacity, safety, and multi-modal access. Projects under study include interchange enhancements with I-70, intersection reconstructions near Columbia and Cooksville, and coordinated transit-access measures with MTA and WMATA to better link bus and rail nodes. Environmental reviews reference U.S. Environmental Protection Agency guidance and coordination with Maryland Department of the Environment for stormwater management and habitat protection near sensitive areas such as waterways feeding into the Chesapeake Bay. Funding sources combine state transportation budgets, federal surface transportation programs, and local contributions from Prince George's County, Montgomery County, Howard County, and Carroll County governments to implement phased upgrades.

Category:State highways in Maryland