Massachusetts Route 3

Massachusetts Route 3 is a major state highway in eastern Massachusetts, providing a vital corridor between the Greater Boston area and the state's South Shore and North Shore regions. It runs approximately 62 miles from its southern terminus at the Braintree Split interchange with Interstate 93 and U.S. Route 1 in Braintree north to the New Hampshire border in Tyngsborough, where it continues as New Hampshire Route 3. The highway serves as a primary commuter route and a key connector to Interstate 495 and Interstate 95.

Route description

From its origin at the complex Braintree Split, the highway travels northward through the densely populated suburbs south of Boston. It passes through or near Quincy, Milton, and Randolph, skirting the western edge of the Blue Hills Reservation. Continuing north, Route 3 intersects with Massachusetts Route 24 in Avon, providing a link to Brockton and Fall River. The route then proceeds through Plymouth County, serving Rockland and Hanover before meeting the critical junction with Massachusetts Route 228. North of this point, the highway traverses more suburban and exurban landscapes, passing near Hingham and Cohasset before entering Norfolk County. It continues through Marshfield and Scituate, eventually crossing into Plymouth near the Cape Cod Canal. The northern segment runs through Pembroke and Kingston, intersecting Massachusetts Route 3A multiple times. After passing Duxbury and Plymouth, it curves northwest, serving Carver and Middleborough before a major interchange with Interstate 495. The final stretch runs through Lakeville and Taunton, culminating at the New Hampshire state line in Tyngsborough.

History

The corridor now followed by Route 3 has origins as a collection of colonial-era post roads and turnpikes, including sections of the historic Boston Post Road. It was designated as part of the New England Interstate Highway System in the early 20th century, initially known as New England Route 3. The modern limited-access highway was constructed in stages throughout the mid-20th century, with significant expansions during the administration of Governor Foster Furcolo and under the broader Interstate Highway System initiatives. A major realignment and upgrade project in the 1960s and 1970s transformed much of its length into a high-speed freeway, particularly the section south of Boston known as the Southeast Expressway. The highway's northern terminus was extended to the New Hampshire border to improve connectivity with Nashua and Manchester. Throughout its history, it has been a focal point for regional transportation planning by the Massachusetts Department of Transportation and its predecessor, the Massachusetts Department of Public Works.

Major intersections

Major junctions along Route 3 include its southern terminus at the Braintree Split with Interstate 93 and U.S. Route 1. Northbound, it meets Massachusetts Route 24 in Avon, a key route to Southeastern Massachusetts. It intersects Massachusetts Route 228 in Rockland, providing access to Cohasset and Hull. Farther north, it has a significant interchange with Massachusetts Route 3A in Kingston, near the Plymouth town line. The highway crosses Interstate 495 in Plymouth, a major beltway around Boston. Its northern terminus is at the New Hampshire state line in Tyngsborough, where it continues as New Hampshire Route 3 toward Nashua.

Auxiliary routes

Route 3 has several auxiliary routes that provide local connections and alternate pathways. The primary auxiliary is Massachusetts Route 3A, a longer, parallel surface road that runs from Braintree to Tyngsborough, passing through historic town centers like Plymouth and Duxbury. Other related state highways include Massachusetts Route 18, which intersects in Abington, and Massachusetts Route 53, which meets in Hanover. These routes feed traffic onto the mainline Route 3 and serve local communities bypassed by the limited-access freeway.

See also

* Interstate 93 in Massachusetts * U.S. Route 1 in Massachusetts * Massachusetts Route 24 * Massachusetts Route 3A * Interstate 495 (Massachusetts) * Massachusetts Department of Transportation * South Shore (Massachusetts) * North Shore (Massachusetts)

Category:State highways in Massachusetts