Maryland Route 45

Maryland Route 45
State	MD
Type	MD
Route	45
Length mi	39.29
Established	1927
Direction a	South
Terminus a	U.S. Route 1/U.S. Route 40 (Baltimore)
Direction b	North
Terminus b	Interstate 83 (Hunt Valley)
Counties	Baltimore City, Baltimore County

Maryland Route 45 is a state highway in Maryland running from central Baltimore north through Baltimore County to the vicinity of Hunt Valley. The route follows the historic alignment of U.S. Route 1 and serves as a principal arterial through neighborhoods such as Mount Vernon, Towson, and Lutherville. MD 45 connects a mix of commercial districts, institutional anchors, and suburban communities while intersecting major highways including I-695, MD 146, and I-83.

Route description

MD 45 begins in central Baltimore near the intersection with U.S. Route 1 Business and passes landmarks such as the Penn Station, Johns Hopkins Hospital, and the Peabody Institute. Heading north as a multi-lane urban arterial, the highway traverses neighborhoods including Charles Village and Waverly before entering the municipal boundary of Baltimore County. Along its course the route intersects corridors like MD 2 and MD 139 near commercial clusters and historic districts such as Roland Park and Goucher College.

Continuing toward Towson, MD 45 serves downtown Towson’s civic core adjacent to institutions including Towson University and the Baltimore County Courthouse. The road then proceeds north through residential suburbs including Rosedale and Lutherville with connections to MD 647 and MD 146, providing access to community services, shopping centers, and historic sites like Calverton. Near its northern terminus the highway encounters an interchange with Interstate 83 in the Hunt Valley area, close to regional destinations such as Glen Arm and business parks that link to MD 25 and Maryland Route 45 Alternate corridors.

History

The corridor followed by MD 45 traces its origins to early colonial turnpikes and the historic Baltimore and Susquehanna Railroad rights-of-way that shaped travel in 19th century Baltimore. With the advent of numbered highways in the 20th century, the roadway formed part of the original routing of U.S. Route 1 before federal and state realignments moved long-distance traffic onto newer limited-access facilities such as I-95 and I-695. The Maryland State Roads Commission incorporated the corridor into the state system during the 1920s, concurrent with improvements connected to the expansion of Good Roads Movement initiatives and the rise of automobile travel.

Throughout the mid-20th century MD 45 underwent widening projects, intersection realignments, and streetscape improvements tied to urban renewal programs in Baltimore and suburbanization trends in Baltimore County. Key intersections were modified during the postwar era to accommodate increasing commuter volumes between Baltimore and northern suburbs, paralleling construction of Interstate 83 and regional arterial networks. Preservation-minded efforts in the late 20th and early 21st centuries focused on balancing mobility with historic district integrity in sections adjacent to landmarks like Riverside Park and academic campuses.

Major intersections

- Southern terminus near U.S. Route 1 Business/U.S. Route 40 — central Baltimore - Intersection with MD 2 — approaches to Federal Hill - Junction with MD 139 — access to Roland Park - Crossing of Interstate 695 — Beltway connection serving Towson - Downtown Towson intersection adjacent to Towson University and Baltimore County Courthouse - Intersection with MD 146 — link to Cockeysville - Northern interchange with I-83 — terminus at Hunt Valley

Auxiliary routes

Several short designations and unsigned service roads associated with MD 45 provide local access, turning movements, and business entrances near commercial nodes and institutional driveways. These auxiliary segments, often referenced internally by the Maryland State Highway Administration, include spur connectors to parallel frontage streets, short link roads feeding municipal parking facilities in downtown Towson, and remnants of former alignments preserved for access to historic properties and transit stops. Some auxiliary links intersect with county-maintained roads that serve neighborhoods such as Lutherville and Glen Arm.

Future developments

Planned and proposed projects affecting MD 45 emphasize multimodal improvements, safety enhancements, and context-sensitive upgrades coordinated with stakeholders including Maryland Department of Transportation, Baltimore County government, and neighborhood associations in Baltimore and Towson. Initiatives under study include pedestrian and bicycle facility expansions to better connect campuses like Towson University with transit stops, streetscape investments to reinforce commercial districts along the corridor, and intersection redesigns aimed at reducing congestion near nodes serving Interstate 695 and I-83. Long-range plans also consider coordination with regional transit proposals and climate resilience measures tied to stormwater management in urbanized segments.

Category:State highways in Maryland Category:Baltimore County, Maryland