Massachusetts Route 40

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Route 40 marker

Route 40
Route information
Length: 10.46 mi[1] (16.83 km)
Existed: late 1940s – present
Major junctions
West end: MA Route 119.svgMA Route 225.svg Route 119/Route 225 in Groton
  US 3.svg U.S. Route 3 in Chelmsford
East end: MA Route 3A.svg Route 3A in Chelmsford
Counties: Middlesex
Highway system
Route 39 Route 41

Route 40 is a 10.5-mile (16.9 km) east–west state route located in northeastern Massachusetts, entirely within Middlesex County. The short highway connects Groton and Chelmsford. Its western end is at an intersection with Massachusetts Route 119 and Massachusetts Route 225 in Groton, and its eastern end is at Route 3A in North Chelmsford. The route has existed since the late 1940s.

U.S. Route 3 has an interchange with Route 40, at Exit 33.

Route description[edit]

Route 40 begins in the west near the center of Groton at an intersection with Main Street (Routes 119 and 225). The highway proceeds eastward out of the downtown area, passing through the northern part of the town of Westford. Most of the route winds through rather densely wooded areas, with several ponds located alongside or near the highway. The road continues into the Chelmsford neighborhood of North Chelmsford, where it interchanges with U.S. Route 3 at Exit 33. Route 40 continues another mile eastward, emerging from the woods before ending at an intersection with Route 3A in the center of North Chelmsford at Vinal Square, located just west of the Merrimack River.

Junction list[edit]

The entire route is in Middlesex County.

Location mi km Destinations Notes
Groton 0.00 0.00 Route 119 / Route 225 – Littleton Western terminus of Route 40.
To Route 111, via Route 119/225 West.
Chelmsford 9.1 14.6 US 3 – Lowell, Burlington, Nashua NH US 3 Exit 33.
10.46 16.83 Route 3A – Tyngsboro, Nashua NH, Lowell Eastern terminus of Route 40.
To Route 4, via Route 3A South.
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
MA Route 40 eastbound in Groton


Route map: Bing / Google

KML is from Wikidata
  • Kelley, Neil. "MA 40" (route log entry). Massachusetts Route Log. Retrieved 2006-07-04. 
  • Moraseski, Dan. "MA routes 40-49". MA route log. Archived from the original on 2004-10-25. Retrieved 2006-07-04.  (Wayback Machine archive, original site down)