Massachusetts Route 40

Route 40 is a 10.46-mile-long (16.83 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.

Route 40 marker

Route 40
Route 40 highlighted in red
Route information
Length10.46 mi[1] (16.83 km)
Existedlate 1940s–present
Major junctions
West end Route 119 / Route 225 in Groton
  US 3 in Chelmsford
East end Route 3A in Chelmsford
Highway system
Route 39Route 41

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

Route descriptionEdit

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.

Major intersectionsEdit

The entire route is in Middlesex County.

Groton0.000.00   Route 119 / Route 225 (Main Street) – Littleton, TownsendWestern terminus
Chelmsford9.1014.65  US 3 – Burlington, Nashua, NHExit 33 on US 3; partial cloverleaf interchange
10.4616.83  Route 3A – Tyngsboro, LowellEastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
MA Route 40 eastbound in Groton


Route map:

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)