I-395

I-395
Number	395
Type	Interstate Highway
Length mi	varies by segment
Established	various dates
States	Connecticut; Maine; Maryland; Massachusetts; Pennsylvania; Rhode Island; Virginia; Washington, D.C.; Florida
Maint	state departments of transportation

I-395

I-395 is the designation shared by multiple auxiliary Interstate Highways in the United States that serve as spur or connector routes into urban cores, port facilities, and regional corridors. These separate segments provide links between primary Interstate routes and central business districts, waterfronts, airports, and military installations across several states, reflecting diverse roles in regional transportation infrastructure and metropolitan urban planning. Each segment exhibits unique routing, history, and operational characteristics influenced by local political decisions, economic development, and federal Interstate Highway System policies.

Route description

One major I-395 branch runs in southeastern Connecticut as a north–south spur from I-95 near Groton toward I-84 in Plainfield, traversing near Subase New London, United States Naval Submarine Base New London, and passing towns such as New London, Norwich, and Danielson. Another prominent segment exists in Maine as a connector from I-95 at Bangor to US 1 toward Coastal Maine, routing through or near Brewer and Orono and providing access to University of Maine. In the Washington, D.C. metropolitan area, I-395 comprises the southwest freeway corridor linking the Capital Beltway and I-95 with central Washington, crossing the Anacostia River and providing access to United States Capitol environs, National Mall, and Arlington. Additional short spurs and unsigned sections occur in Maryland, Massachusetts, Pennsylvania, Rhode Island, and Florida, often functioning as business loops, connector ramps, or urban expressways near landmarks like Logan International Airport, Baltimore Inner Harbor, and Port of Miami. Routes interact with corridors including US 1, US 6, US 202, and state routes managed by departments like Connecticut Department of Transportation and Maine Department of Transportation.

History

The I-395 segments originated from mid-20th-century planning tied to the federal Federal-Aid Highway Act of 1956 and regional urban renewal initiatives in cities like Washington, D.C. and Providence. Connecticut's corridor evolved from earlier proposals for extending US 2 and connecting naval facilities, influenced by leaders in Connecticut General Assembly and federal approvals by the Federal Highway Administration. Maine's connector traces origins to efforts by the Maine Turnpike Authority and local development interests in Bangor following interstate expansions. The Washington-area I-395 corridor emerged amid debates in the National Capital Planning Commission, conflicts involving neighborhoods such as Anacostia, legal challenges associated with the National Environmental Policy Act, and activism from groups like the Committee of 100 on the Federal City and local civic associations. Over time, policy shifts—including Urban Mass Transportation Act of 1964 considerations, urban freeway revolts documented in cities like Boston and Philadelphia—led to truncations, redesignations, and reconfigurations of several I-395 spurs.

Major interchanges and exits

Key interchanges on various I-395 segments include junctions with I-95 near Groton, connections to I-84 in Plainfield, Connecticut, interchange complexes with I-495 and I-95 in the Washington metropolitan area, and ramps serving US 1 and US 2 near Bangor. Other notable interchanges provide access to infrastructure such as Logan International Airport, Baltimore–Washington International Thurgood Marshall Airport, Port of Baltimore, and military facilities like Fort Belvoir. Many exits interface with state routes such as Connecticut Route 12, Maine State Route 2, Massachusetts Route 1A, and urban arterials overseen by agencies including the District Department of Transportation and Massachusetts Department of Transportation.

Traffic and usage

Traffic volumes vary widely: urban segments near Washington, D.C. experience peak-hour congestion from commuter flows to federal agencies like Department of Defense and General Services Administration facilities, while Maine and Connecticut spurs see seasonal peaks tied to tourism to destinations like Acadia National Park and coastal communities. Freight movements to ports involve carriers contracted under United States Maritime Administration guidelines and intersect with rail hubs operated by CSX Transportation and Pan Am Railways. Usage patterns reflect modal interactions with regional transit providers such as Washington Metropolitan Area Transit Authority, Connecticut Transit, and Bangor Area Transit.

Construction and improvements

Construction phases were executed by contractors under state DOT procurement rules, with major projects funded through packages including Interstate Maintenance Program and discretionary grants from agencies like the Federal Transit Administration when intermodal elements applied. Notable improvement projects comprised bridge replacements spanning the Thames River and Anacostia River, deck rehabilitations near Memorial Bridge, interchange reconstructions to modernize ramp geometry to standards set by the American Association of State Highway and Transportation Officials (AASHTO), and added intelligent transportation systems coordinated with Regional Transportation Commission initiatives.

Incidents and safety

Segments have recorded incidents from multi-vehicle collisions on high-speed ramps to structural concerns prompting temporary closures, with responses coordinated by state police units including Connecticut State Police and Metropolitan Police Department of the District of Columbia. Safety measures implemented include ramp metering pilots, enhanced signage complying with MUTCD standards, and targeted enforcement operations jointly run with agencies such as National Transportation Safety Board investigations when catastrophic failures occurred.

Future plans and proposals

Planned and proposed actions range from capacity upgrades to multimodal integration studies involving entities like the U.S. Department of Transportation, metropolitan planning organizations such as the Washington Metropolitan Council of Governments, and state-level commissions. Proposals include potential daylighting of depressed segments to restore urban fabric, construction of pedestrian and bicycle crossings adjacent to highway corridors promoted by groups like Rails-to-Trails Conservancy, and resilience projects addressing coastal flooding coordinated with National Oceanic and Atmospheric Administration guidance.

Category:Auxiliary Interstate Highways