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| New Hampshire Route 106 | |
|---|---|
| State | NH |
| Type | NH |
| Route | 106 |
| Length mi | 26.45 |
| Direction a | South |
| Terminus a | Hooksett |
| Direction b | North |
| Terminus b | Littleton |
| Counties | Merrimack County, Grafton County |
New Hampshire Route 106 is a north–south state highway in central and northern New Hampshire connecting Hooksett and Littleton via the state capital region and the Lakes Region. The route serves as a regional connector between Interstate 93, U.S. Route 3, and New Hampshire Route 18, and provides access to recreational destinations such as Lake Winnisquam, Lake Winnipesaukee, and Franconia Notch State Park. The highway passes through towns including Concord, Plymouth, New Hampshire, and Holderness and interfaces with rail corridors and aviation facilities like Manchester–Boston Regional Airport.
The highway begins near Interstate 93 and U.S. Route 3 in Hooksett, runs north through Merrimack County and into Concord, where it crosses major local corridors serving New Hampshire State House area and connects to U.S. Route 4 and New Hampshire Route 3A. Proceeding north, the route skirts the eastern shore of Lake Winnisquam and passes through or near communities such as Belmont and Laconia, providing links to Weirs Beach and the M/S Mount Washington terminal. North of the lakes area, the road continues toward Plymouth and Holderness, where it affords access to Holderness School and recreational trails leading into White Mountain National Forest. The northern terminus lies near Littleton, connecting travelers to New Hampshire Route 18 and regional routes toward Franconia Notch and I-93.
The alignment evolved from 19th-century turnpikes and stagecoach roads that linked Manchester and Littleton via market towns such as Concord and Plymouth. Early improvements were influenced by statewide road programs associated with figures like Franklin Pierce era infrastructure advocates and later by the Good Roads Movement prominent in the early 20th century alongside developments tied to Automobile Club of America initiatives. The designation as a numbered state route occurred during the 1920s highway renumbering that also established routes such as U.S. Route 3 and U.S. Route 4. Subsequent 20th-century projects—mirroring national programs like those under the Federal Aid Highway Act of 1956—upgraded segments to accommodate higher traffic volumes, with intersections reconstructed to interface with limited-access highways such as Interstate 93. Bridge replacements and safety retrofits have been completed in phases concurrent with regional economic shifts tied to tourism in Lake Winnipesaukee and outdoor recreation in White Mountain National Forest.
The route interconnects with federal and state corridors at several principal junctions: the southern terminus near Interstate 93/U.S. Route 3 in Hooksett; a major junctioning point near Concord with U.S. Route 4 and New Hampshire Route 3A serving access to the New Hampshire State House; crossings providing access to New Hampshire Route 11 and New Hampshire Route 106B near Laconia and Belmont toward Weirs Beach and Gunstock Mountain Resort; northern connections near Plymouth to U.S. Route 3/Interstate 93 corridors; and the northern terminus linking to New Hampshire Route 18 in the Littleton area, which offers continuations toward Franconia Notch State Park and Bethlehem.
Traffic patterns reflect mixed commuter, commercial, and tourist use, with peak volumes during summer months linked to destinations such as Lake Winnipesaukee attractions and events at venues like Bank of New Hampshire Pavilion in Gilford. Daily commuter flows connect bedroom communities to employment centers in Manchester and Concord, while seasonal peaks correspond with festivals in Laconia and outdoor recreation in White Mountain National Forest. Freight movements utilize the corridor to reach distribution nodes and intermodal facilities including the Manchester–Boston Regional Airport cargo operations and regional railheads tied to Pan Am Railways corridors. Safety data has prompted targeted interventions at high-crash locations, coordinated with entities such as the New Hampshire Department of Transportation.
Maintenance responsibility falls under the New Hampshire Department of Transportation for state-controlled segments, with municipal agencies in towns like Hooksett, Concord, and Littleton coordinating on local connections, snow removal, and seasonal roadway treatments. Capital projects have been funded through a combination of state transportation bonds and federal aid programs linked historically to legislation such as the Surface Transportation Assistance Act of 1982, with asset management practices aligned with National Highway System standards and pavement preservation methodologies promoted by organizations like the American Association of State Highway and Transportation Officials. Environmental reviews for improvements near sensitive areas such as Lake Winnisquam have involved coordination with New Hampshire Department of Environmental Services and federal agencies when projects engaged wetlands or protected habitats.