Interstate 495 Massachusetts

History
North End
South End

Overview

Interstate 495 is the outer beltway serving Boston metropolitan area commuters. Cities directly served by I-495 include Lowell, Lawrence and Haverhill. The highway also provides part of a bypass route from the Mass Pike south to Cape Cod and north to the New Hampshire Seacoast.

Until 1996, I-495 was the longest three-digit Interstate highway, when I-476 in Pennsylvania was extended north from Plymouth Meeting to Clarks Summit.

I-495 north at I-90 / Mass Pike - Westborough, MA
Interstate 495 north at the trumpet interchange and access road to the Mass Pike at Westborough. Photo taken 10/06/14.

Plans for 2021 or beyond call for improving the I-90/495 interchange. With the Mass Pike switch to all electronic tolling (AET) on October 28, 2016, the toll plaza between the two trumpet interchanges linking the beltway and toll road was no longer needed. The removal of the toll barrier allows for the addition of flyovers or other high speed ramps to eliminate some of the weaving traffic patterns currently in place.

History

Interstate 495 was built in segments between 1958 and 1982.1 The route ended at Interstate 95 in Foxborough from the north until June 17, 1975, when AASHTO approved the southeasterly extension to Interstate 195 at Wareham. With mileage gained from the cancellations of both I-95 along the Southwest and Northeast Expressways through Boston, and the Inner Belt Expressway for I-695, the I-495 extension superseded Route 25 1 Interchanges were renumbered to start at Wareham instead of Foxborough.

Route Information

  • North End – Salisbury, MA

  • South End – Wareham, MA

  • Mileage – 121.56 (*122.80 northbound/ 122.95 southbound)

  • Cities – Marlborough, Lowell, Lawrence, Haverhill, Amesbury

  • JunctionsI-195 I-95 I-90 Mass Pike I-290 I-93

Source: December 31, 2018 Interstate Route Log and Finders List
* – MassDOT Massachusetts Route Log Application

I-495 Annual Average Daily Traffic (AADT)

North End I-95 – Salisbury, Massachusetts

I-495 North at I-95

I-495 north at Route 110/I-95 - Amesbury, MA

Route 110 provides a Breezewood style connection to Interstate 95 south from I-495 north. The four lane arterial leads east from Exit 55, three quarters of a mile to a parclo interchange with I-95 in the town of Saulsbury. 07/30/07

I-495 north at I-95 - Amesbury, MA

The remainder of Interstate 495 north defaults onto I-95 north into Seabrook, New Hampshire in one mile. A pair of ground level signs replaced this overhead assembly. Photo by Jim Teresco (11/18/01).

I-495 north at I-95 - Salisbury, MA

An end shield formerly posted at the wye interchange with Interstate 95 north. I-95 transitions to the tolled Blue Star Turnpike in three miles. Portsmouth lies 16 miles to the northeast. Photo by Jim Teresco (11/18/01).

I-495 North at I-95

I-95 south at Route 286/I-495 - Salisbury, MA

The first sign for Interstate 495 south appears in the town of Seabrook, New Hampshire, two miles ahead of the split from I-95 south. Photo by H.B. Elkins (06/01/13).

I-95 south at Route 286/I-495 - Salisbury, MA

Just across the state line, a second diagrammatic sign outlines the forthcoming wye interchange (Exit 59) with Interstate 495 south. The initial stretch of the 122 mile long beltway parallels the Merrimack River west through the towns of Amesbury and Merrimac. Photo by H.B. Elkins (06/01/13).

I-95 south at I-495 - Salisbury, MA

Continuing south from the wye interchange (Exit 60) with the connector to MSR 286 and U.S. 1 in Salisbury, I-95 proceeds one half mile to Interstate 495. I-495 loops southwest 11 miles to Haverhill while I-95 advances south to the John Greenleaf Whittier Bridge across the Merrimack River. Photo by H.B. Elkins (06/01/13).

I-95 south at I-495 - Salisbury, MA

Interstate 495 travels southwest to Lawrence, Lowell, and Marlborough before returning southeast toward Cape Cod. Connections with Interstate 290 in 60 miles provide a direct route to Worcester. Photo by H.B. Elkins (06/01/13).

I-495 South

I-495 south - Amesbury, MA

Leading away from Interstate 95, a begin shield stands along I-495 south by the Amesbury town line. Photo by H.B. Elkins (06/01/13).

South End I-195 Route 25 – Wareham, Massachusetts

I-495 South at I-195 Route 25

I-495 south at I-195/Route 25 - Wareham, MA

Southeast into the town of Wareham, the final two miles of Interstate 495 traverse an area of wetlands dotted by cranberry bogs. 07/28/07

I-495 south at I-195/Route 25 - Wareham, MA

Advancing south of the Weweantic River, a second diagrammatic overhead outlines the forthcoming trumpet interchange (Exit 1) with Interstate 195 west and the freeway continuation onto Route 25 east. 07/28/07

I-495 south at I-195/Route 25 - Wareham, MA

Interstate 195 arcs southwest from I-495 and Route 25 to Mattapoisett and New Bedford. Route 25 continues the freeway 10.04 miles east to U.S. 6 at Buzzards Bay. 07/28/07

I-495 south at I-195/Route 25 - Wareham, MA

Interstate 195 travels 45 miles west from Wareham and I-495 to Fall River and Providence, Rhode Island. 07/28/07

I-495 south at I-195/Route 25 - Wareham, MA

An end sign advises motorists of the southbound transition of I-495 to Route 25 east. Route 25 provides a direct link to the Bourne Bridge across Cape Cod Canal and Route 28 south to Falmouth. Photo by Jim Teresco (08/29/01).

Route 25 West at I-495

Route 25 west at I-195/495 - Wareham, MA

Route 25 west transitions into northbound Interstate 495 within the trumpet interchange (Exit 1) with I-195 west. Photo by H.B. Elkins (05/31/13).

Page updated May 7, 2020.