Interstate 495 (Massachusetts)

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Interstate 495 marker

Interstate 495
Blue Star Memorial Highway
Route information
Maintained by MassDOT
Length: 120.74 mi[1] (194.31 km)
Existed: 1957 – present
Major junctions
South end: I‑195 / Route 25 in Wareham
 

US 44 in Middleboro
I‑95 in Foxboro
US 1 in Plainville
I‑90 / Mass. Pike in Hopkinton
US 20 in Marlboro
I‑290 in Hudson
US 3 in Chelmsford

I‑93 in Andover
North end: I‑95 in Salisbury
Location
Counties: Plymouth, Bristol, Norfolk, Worcester, Middlesex, Essex
Highway system
  • Massachusetts State Highway Routes
I-395 I-695
I-495 bridge over the Merrimack River
in Lawrence

Interstate 495 (abbreviated I-495) is the designation of an Interstate Highway half-beltway in Massachusetts. It was the longest auxiliary Interstate Highway of its kind—measuring 120.74 miles (194.40 kilometers)—until 1996, when the PA Route 9 section of the Pennsylvania Turnpike was redesignated as Interstate 476, making it about 11 miles (18 km) longer than I-495.[2][3][4] I-495 has its northern terminus at Interstate 95 in Salisbury. The highway, forming an arc approximately 30 miles (48 km) from Boston, intersects eight major radial expressways along its route: Interstate 93, U.S. Route 3, Route 2, Interstate 290, Interstate 90 (The Massachusetts Turnpike), Route 24 and Interstate 95 (twice). It has its southern terminus in Wareham, where Interstate 195 and Route 25 meet. Originally, the stretch from Route 24 to Interstate 195 was signed as Route 25; that status now only begins east of I-195.

I-495 and areas to its immediate west are often regarded as the outermost boundary of the Greater Boston region: its northern segment parallels the border with New Hampshire, at one point coming as close as 400 feet; its southern end is just north of Cape Cod; west of I-495 is the Worcester area and Central Massachusetts. In a more restricted sense, The Yankee Division Highway (Route 128 and the first 6.5 miles (10.5 km) of Interstate 93), which is parallel to I-495 but closer to the city, is sometimes regarded as the outer boundary of Boston's immediate suburbs.

The stretch of 495 north and east of Route 2 until its terminus at Interstate 95 in Salisbury is also the main limited access highway connecting the communities of the more urbanized Merrimack Valley region, separate from its purpose as a beltway for Boston.

Route description[edit]

Interstate 495 begins as the direct continuation of Route 25 at the intersection with Interstate 195 in West Wareham. It starts as a two-lane highway in both directions. It gets the third lane during the interchange with Route 24. The junction includes the unusual transition of shrinking from the six-lane Route 25 to the four-lane interstate, due to the third lane of Route 25 joining to and from I-195. The road heads roughly northwest, passing through the towns of Rochester and Middleboro (where the road meets U.S. Route 44) as a four-lane highway before entering Bristol County, crossing the Taunton River at Raynham. There, it becomes a six-lane highway just southeast of the Route 24 interchange (which is actually in neighboring Bridgewater).

The road continues northwest through Taunton and Norton before entering Mansfield, where there is a short exit lane concurrency with Route 140. Interstate 495 makes its southern junction with its parent route, Interstate 95 on the border between Mansfield in Bristol County and Foxboro in Norfolk County. The road continues through Plainville (where there is a junction with U.S. Route 1, a popular exit for those heading to Gillette Stadium) and Wrentham (where the Wrentham Village Premium Outlets lie beside the highway at Route 1A). The highway comes within 2 miles of the Rhode Island state line before turning in a more northerly direction through Franklin and Bellingham.

Interstate 495 then begins to weave between far eastern Worcester County and western Middlesex County, passing through Milford in Worcester County, to Hopkinton in Middlesex County (where the junction with the Massachusetts Turnpike, or Interstate 90, is located). It then passes back into Worcester County a second time, going through Westboro (where the road meets Route 9) and Southboro. It then returns to Middlesex County briefly in the towns of Marlboro (where the road meets U.S. Route 20 and Interstate 290) and Hudson before making its final pass through Worcester County in the towns of Berlin, Bolton (where the road finally begins to turn northeasterly) and Harvard.

After weaving through the edge of Worcester County, the road finally re-enters Middlesex County, passing through Boxboro, Littleton (where there is an intersection with Route 2), Westford and Chelmsford. At the Chelmsford-Lowell line lies the intersection with U.S. Route 3 and the Lowell Connector (formerly Business Spur 495). The road continues through Lowell and Tewksbury before entering Essex County at Andover, directly at exit 39.

In Andover, the road has a junction with Interstate 93. It then enters the city of Lawrence, where the road turns due north, crossing the Shawsheen River into North Andover before crossing the Merrimack River at the O'Reilly Bridge back into Lawrence. It then heads into Methuen, where the road turns back to a northeasterly route after the junction with the Loop Connector (Rte. 213). The road heads into Haverhill, crossing the Merrimack twice more at a bend in the Bradford section of town. It passes north of downtown Haverhill, coming within 150 yards of the New Hampshire state line, the closest the road comes to leaving the state. Interstate 495 then passes through the towns of Merrimac and Amesbury before finally terminating as it merges with Interstate 95 in Salisbury, approximately 1.5 miles (2.4 km) south of where that interstate enters New Hampshire.

Throughout its path, the road passes closely to several existing state highways. From Wareham through to the Middleboro Rotary, it parallels Route 28. For much of the stretch between Norton and Milford, the road is within a few miles of Route 140, with two junctions of that highway in Mansfield and Franklin. From Milford to Bolton, the road passes just west of Route 85. Much of the northern third of the route also roughly parallels Massachusetts Route 110.[5]

Possible improvements[edit]

Some improvements expected to come to I-495 in the next few years include a project that will install fiber optic cable, traffic cameras and VMS Signs on I-495 from I-90 (Hopkinton) to I-93 (Andover). The new ITS system will help commuters and the state better understand the traffic congestion on I-495.

Exit list[edit]

County Location Mile[6] km Exit Destinations Notes
Plymouth Wareham 0.00 0.00 Route 25 east – Cape Cod Southern terminus
0.02 0.03 1 I‑195 west – New Bedford, Providence, RI Eastern terminus of I-195
2.49 4.01 2 Route 58 – Carver, Plymouth No signage for Route 58 south, which ends .45 miles (0.72 km) to the south
Middleboro 7.60 12.23 3 Route 28 – Rock Village, South Middleboro
12.07 19.42 4 Route 105 – Middleboro Center, Lakeville
14.31 23.03 5 Route 18 to US 44 – Bridgewater, Plymouth, Lakeville, New Bedford No signage for US 44 southbound
14.73 23.71 6 US 44 – Middleboro, Taunton, Plymouth, Providence, RI
Bridgewater 19.08 30.71 7 Route 24 – Boston, Fall River Split into exits 7A (north) and 7B (south)
Bristol Raynham 21.68 34.89 8 Route 138 – Stoughton, Taunton
Taunton 24.51 39.45 9 Bay Street – Taunton, Easton
Norton 26.91 43.31 10 Route 123 to Route 140 south – Norton, East Mansfield, Easton No signage for Route 140 southbound
Mansfield 29.90 48.12 11 Route 140 south – Norton No northbound exit
30.71 49.42 12 Route 140 north – Mansfield
Norfolk Foxboro 32.89 52.93 13 I‑95 – Boston, Providence, RI Split into exits 13A (north to
Plainville 35.57 57.24 14 US 1 – Wrentham, North Attleboro Split into exits 14A (north) and 14B (south)
Wrentham 37.56 60.45 15 Route 1A – Wrentham, Plainville, Norfolk
Franklin 40.95 65.90 16 King Street – Franklin, Woonsocket, RI
43.18 69.49 17 Route 140 – Franklin, Bellingham
Bellingham 45.82 73.74 18 Route 126 – Medway, Bellingham
Worcester Milford 48.32 77.76 19 Route 109 – Milford, Medway, Holliston, Uxbridge to Route 16
50.25 80.87 20 Route 85 – Milford, Hopkinton, Uxbridge
Middlesex Hopkinton 54.15 87.15 21 West Main Street – Hopkinton, Upton Split into exits 21A (Hopkinton and Ashlan) and 21B (Upton)
57.89 93.16 22 I‑90 (Mass Pike) – Boston, Albany, NY Exit 11A on I-90
Worcester Westboro 59.41 95.61 23
A-B
Route 9 – Framingham, Worcester, Southboro, Westboro Split into exits 23A (east) and 23B (west)
Middlesex Marlboro 61.71 99.31 23C Simarano Drive – Marlboro, Southboro Interchange constructed in 2000
63.11 101.57 24 US 20 – Marlboro, Northboro Split into exits 24A (east) and 24B (west)
64.86 104.38 25 I‑290 west / Route 85 – Hudson, Worcester Eastern terminus of I-290, connection to Route 85 via unnumbered connector road
Worcester Berlin 67.24 108.21 26 Route 62 – Berlin, Hudson, Clinton
Bolton 69.93 112.54 27 Route 117 – Bolton, Stow, Maynard
Middlesex Boxboro 74.56 119.99 28 Route 111 – Boxboro, Harvard
Littleton 77.56 124.82 29 Route 2 – Leominster, Boston Split into exits 29A (east) and 29B (west)
79.09 127.28 30 Route 2A / Route 110 – Littleton, Ayer
80.10 128.91 31 Route 119 – Groton, Acton
Westford 83.17 133.85 32 Boston Road – Westford To Route 111 and Route 225
Chelmsford 87.56 140.91 33 Route 4 – North Chelmsford Northbound exit and southbound entrance
88.05 141.70 34 Route 110 to Route 4 – Chelmsford, Lowell No signage for Route 4 northbound
89.04 143.30 35
A-B
US 3 – Burlington, Nashua, NH Split into exits 35A (south) and 35B (north)
Lowell 89.31 143.73 35C Lowell Connector Formerly exit 36
91.07 146.56 37 Woburn Street – South Lowell, North Billerica
Tewksbury 92.16 148.32 38 Route 38 – Lowell, Tewksbury
94.49 152.07 39 Route 133 – Dracut, Andover Southbound offramp begins in Essex County
Essex Andover 96.91 155.96 40 I‑93 – Boston, Concord, NH Split into exits 40A (south) and 40B (north)
99.31 159.82 41 Route 28 – Lawrence, Andover Split into exits 41A (south) and 41B (north) northbound
Lawrence 100.03 160.98 42 Route 114 – Middleton, South Lawrence Split into exits 42A (east) and 42B (west)
North Andover 100.83 162.27 43 Massachusetts Avenue – North Andover
101.27 162.98 44 Merrimack Street
Lawrence 101.82 163.86 45 Commonwealth Drive / Marston Street – Lawrence, Methuen Split into exits 45A (Commonwealth) and 45B (Marston)
Methuen 103.00 165.76 46 Route 110 (Merrimack Street) – Pleasant Valley
103.93 167.26 47 Route 213 (Loop Connector) – Methuen, Salem, NH Exit 5 on Route 213
Haverhill 105.66 170.04 48 To Route 125 (via Industrial Avenue) – Ward Hill, Bradford
106.50 171.40 49 Route 110 / Route 113 (River Street)
107.18 172.49 50 Route 97 – Haverhill, Salem, NH
108.85 175.18 51 Route 125 – Haverhill, Plaistow, NH Split into exits 51A (south) and 51B (north)
111.04 178.70 52 Route 110 – Haverhill, Merrimac
Merrimac 114.75 184.67 53 Broad Street – Merrimac, Merrimacport
Amesbury 117.71 189.44 54 Route 150 – Amesbury
118.74 191.09 55 Route 110 east to I‑95 south – Salisbury, Boston Northbound exit and southbound entrance
Salisbury 120.74 194.31 I‑95 north – Portsmouth, NH Northern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References[edit]

  1. ^ Executive Office of Transportation - Office of Transportation Planning Roads GIS Data
  2. ^ Pennsylvania Turnpike Commission, November 1, 1996.
  3. ^ Interstate 476, pahighways.com.
  4. ^ Shortest and Longest 3-digit interstates, kurumi.com. Note the discrepancy between the mileage listed on kurumi.com and the actual mileage indicated by the exit list from Interstate 476. Google Maps lists the distance as 130 miles (210 km).
  5. ^ BostonRoads.com, Outer Circumferential Highway: Historical Overview Retrieved Jan. 24, 2010[self-published source?]
  6. ^ Massachusetts Executive Office of Transportation. 2007. "Interchange Exit Lists (I-495)". Downloaded from: http://www.eot.state.ma.us/default.asp?pgid=planning/disc/interchanges&sid=dtable August 7, 2011.

External links[edit]

Route map: Google / Bing