. It was the longest interstate highway of its kind – measuring in at 120.74
.
. The highway, forming an arc approximately 30 miles from
(twice). It has its southern terminus in
meet. Originally, the stretch from Route 24 to Interstate 195 was signed as Route 25; that status now only begins south of I-195.
area and Central Massachusetts. In a more restricted sense, The
), which is parallel to I-495 but closer to the city, is sometimes regarded as the outer boundary of Boston's immediate
s.
in Salisbury is also the main limited access highway connecting the communities of the more urbanized
region, separate from its purpose as a beltway for Boston. This stretch of expressway closely follows
.
| County | Location | Mile | Exit # | Destinations | Notes |
|---|
| begins at |
|---|
| Plymouth | Wareham | 0.00 | 1 | I-195 West – New Bedford, Providence | Mainline continues as MA-25 |
| 2.48 | 2 | MA-58 – Carver, Plymouth |
| Middleborough | 10.31 | 3 | MA-28 – Rock Village, South Middleborough |
| Parking Areas | 1 area NB, 2 areas SB |
| 13.42 | 4 | MA-105 – Middleborough Center, Lakeville |
| 14.33 | 5 | MA-18 – NB: Bridgewater, Plymouth; SB: Lakeville, North Bedford | MA-18 North to US-44 East |
| 14.78 | 6 | US-44 – NB: Taunton, Providence; SB: Middleborough, Plymouth |
| Bristol | Bridgewater | 19.35 | 7 | MA-24 – Boston, Fall River | Split into 7A and 7B |
| Raynham | 21.71 | 8 | MA-138 – Stoughton, Taunton |
| Taunton | 24.82 | 9 | Bay Street – Taunton, Easton |
| Norton | 26.90 | 10 | MA-123 – Norton, East Mansfield, Easton | To Route 140 South |
| Mansfield | 29.9 | 11 | MA-140 South – Norton | Partial interchange: SB exit/NB entrance only. |
| 30.8 | 12 | MA-140 North – Mansfield |
| Norfolk | Foxborough | 32.89 | 13 | I-95 – Boston, Providence | Split into 13A and 13B |
| Plainville | 35.54 | 14 | US-1 – Wrentham, North Attleborough | Split into 14A and 14B |
| Wrentham | 37.36 | 15 | MA-1A – Wrentham, Plainville |
| Franklin | 41.17 | 16 | King Street – Franklin, Woonsocket |
| 43.19 | 17 | MA-140 – Franklin, Bellingham |
| Bellingham | 45.79 | 18 | MA-126 – Medway, Bellingham |
| Milford | 48.30 | 19 | MA-109 – Milford, Medway |
| 50.47 | 20 | MA-85 – Milford, Hopkinton |
| Middlesex | Hopkinton | 54.14 | 21 | West Main Street – Hopkinton, Upton | Split into 21A and 21B |
| 57.87 | 22 | I-90 (Mass Pike) – Boston, Albany |
| Worcester | Westborough | 59.39 | 23AB | MA-9 – Framingham, Worcester |
| Middlesex | Marlborough | 62.09 | 23C | Simarano Drive – Marlborough, Southborough | Interchange constructed in 2000. |
| 63.11 | 24 | US-20 – Marlborough, Northborough | Split into 24A and 24B |
| 64.87 | 25A | To MA-85 – Hudson | Connection via unnumbered connector road |
| 64.87 | 25B | I-290 – Worcester |
| Worcester | Berlin | 67.26 | 26 | MA-62 – Berlin, Hudson |
| Bolton | 69.93 | 27 | MA-117 – Bolton, Stow |
| Middlesex | Boxborough | 74.57 | 28 | MA-111 – Boxborough, Harvard |
| Littleton | 77.55 | 29 | MA-2 – Leominster, Boston | Split into 29A and 29B. |
| 79.09 | 30 | MA-2A, MA-110 – Littleton, Ayer |
| 80.12 | 31 | MA-119 – Groton, Acton |
| Westford | 83.20 | 32 | Boston Road – Westford |
| Chelmsford | Rest Areas |
| 87.5 | 33 | MA-4 – North Chelmsford | Partial interchange: NB exit/SB entrance only |
| 88.1 | 34 | MA-110 – Chelmsford, Lowell | Route 110 west to Route 4 |
| 89.1 | 35AB | US-3 – Burlington, Nashua | |
| Lowell | 89.3 | 35C | Lowell Connector – Lowell | Former exit 36 |
| 91.09 | 37 | Woburn Street – South Lowell, North Billerica |
| Tewksbury | 92.18 | 38 | MA-38 – Lowell, Tewksbury |
| 94.51 | 39 | MA-133 – Dracut, Andover |
| Essex | Andover | 96.92 | 40 | I-93 – Boston, Concord | Split into 40A and 40B. |
| 99.30 | 41 | MA-28 – Lawrence, Andover | Split northbound into 41A and 41B. |
| Lawrence | 100.06 | 42 | MA-114 – Middleton, South Lawrence |
| North Andover | 100.84 | 43 | Massachusetts Avenue | Also signed northbound for Commonwealth Avenue. |
| 101.25 | 44 | Merrimack Street |
| Lawrence | 101.83 | 45 | Marston Street – Lawrence |
| Methuen | 103.00 | 46 | MA-110 (Merrimac Street) – Pleasant Valley |
| 103.93 | 47 | MA-213 (Loop Connector) |
| Haverhill | 105.66 | 48 | To MA-125 – Ward Hill, Bradford | Via unnumbered connector road. |
| 106.52 | 49 | MA-110/MA-113 (River Street) | |
| 107.18 | 50 | MA-97 – Haverhill, Salem |
| 108.87 | 51 | MA-125 – Plaistow, Haverhill | Split into 51A and 51B. |
| Parking Area | Northbound only. |
| 111.05 | 52 | MA-110 – Haverhill, Merrimac |
| Merrimac | Rest Area | Southbound only. |
| 114.77 | 53 | Broad Street – Merrimac, Merrimacport |
| Amesbury | 117.72 | 54 | MA-150 – Amesbury |
| 118.74 | 55 | MA-110 East To I-95 South – Salisbury, Boston | Partial interchange: NB exit/SB entrance only. Entrance from 110 WB only. |
| Salisbury | 120.74 | | Northbound I-495 merges onto northbound I-95. Access to southbound I-495 from southbound I-95 only. |
| ''Source: Shadyjay.com''[2] | ||