INTERSTATE 93


'Interstate 93' (abbreviated 'I-93') is an interstate highway in the New England section of the United States. Its southern terminus is in Canton, Massachusetts, in the Boston metropolitan area, at Interstate 95 (map); its northern terminus is near St. Johnsbury, Vermont, at Interstate 91.

Contents
Route description
History
Construction
Southeast Expressway
Fitzgerald Expressway
Northeast Expressway
New Hampshire
Vermont
Route changes
Big Dig
Exit list
Auxiliary routes
Miscellanea
See also
References
External links

Route description


|-
|MA
|46.19
|74.33
|-
|NH
|131.39
|211.45
|-
|VT
|11.10
|17.86
|-
|Total
|188.68
|303.65
|}
Major cities
'Bolded cities' are officially-designated control cities for signs

★ 'Quincy, Massachusetts'
★ 'Boston, Massachusetts'
★ Lawrence, Massachusetts
★ 'Salem, New Hampshire'
★ 'Manchester, New Hampshire'
★ 'Concord, New Hampshire'
★ 'Plymouth, New Hampshire'
★ 'Littleton, New Hampshire'
★ 'St. Johnsbury, Vermont'

History


Construction

Southeast Expressway

Fitzgerald Expressway

Northeast Expressway

I-93's original southern terminus was in Cambridge (just north of Boston) where it was to meet Interstate 695. However, when that route was canceled, and the I-95 section into Boston was canceled and rerouted along Route 128 in the mid-1970s, I-93's route was extended an additional 18 miles down the Central Artery (which had been signed as a concurrency of I-95/MA-3 before I-95 was rerouted) and the Southeast Expressway (what was then just Route 3) from Boston to Braintree and then west along former Route 128 to its intersection with I-95 in Canton.
New Hampshire

Originally planned to follow the alignment of US 3 through Nashua along the Everett Turnpike, this was changed before construction to the current route through Salem largely due to the intervention of the owners of Rockingham Park. Exit 1 in Salem was originally designed and built with ramps allowing northbound traffic to exit to the race track and return drivers to southbound 93 only. The complementary ramps were added much later, with the southbound off ramp being a particularly tight and dangerous turn squeezed within the curve of the southbound on ramp.
Vermont

Route changes

I-93's route from Boston to Canton has also carried the U.S. Route 1 designation since 1989. The US route's path was changed to assist truck traffic which was banned along much of the route's original path between Boston and I-95/Route 128 in Dedham.
An 8 mile (13 km) section of I-93 through Franconia Notch State Park, called the 'Franconia Notch Parkway' in New Hampshire, was constructed as a two-lane freeway with a median divider. This was built as a compromise between the state's park department and highway officials. The speed limit on the Parkway is 45 mph (70 km/h). Originally, this section's signage read "U.S. 3 TO I-93" in this area complete with its own exit number sequence, but this has since been replaced by I-93 and US-3 signage along the entire length of the Parkway. The exits were renumbered to Exit 34A, 34B, and 34C.
Big Dig

Main articles: Big Dig (Boston, Massachusetts)

Interstate 93 Tunnel

Interstate 93 is famous for being reconstructed by the Central Artery/Tunnel Project, more commonly known as the Big Dig. The Big Dig is the most massive urban construction project in American history[1]. The project replaced the elevated central artery highway that ran through downtown Boston, cutting the city in two. As of October, 2006, the underground construction of the tunnel system is complete; however, repairs continue to many parts of the tunnel due to water leakage because of improper construction of the slurry walls. With construction of the tunnels and demolition of the old elevated highway complete, surface restoration is continuing with the construction of parks and rebuilding of local streets in the former right-of-way.

Exit list


CountyLocationMile
#DestinationsNotes
NorfolkCanton0.00, PortsmouthSouthbound exit and northbound entrance
0.331 - ProvidenceSouthbound exit and northbound entrance
1.392Signed as exits 2A (south) and 2B (north)
Milton2.863Ponkapoag Trail - Houghton's Pond
Randolph3.504
4.265Signed as exits 5A (south) and 5B (north)
Braintree6.716
7.167South end of Route 3 overlap
Quincy8.518Furnace Brook Parkway - Quincy
Milton9.339Bryant Avenue - West QuincySouthbound exit and northbound entrance
9.339Adams Street - Milton, North QuincyNorthbound exit and southbound entrance
9.9110Squantum Street - MiltonSouthbound exit only
10.8611AGranite Avenue - East MiltonSouthbound exit and northbound entrance
10.8611BSigned as exit 11 northbound; no northbound entrance
SuffolkBoston12Southbound exit and northbound entrance
13Freeport Street - DorchesterNorthbound exit and southbound entrance
14Morrissey Boulevard - JFK LibraryNorthbound exit and southbound entrance
15Columbia Road - Edward Everett Square, JFK Library
16Southampton Street - Andrew SquareNorthbound exit and southbound entrance
18Frontage Road, Massachusetts Avenue - Roxbury, Andrew Square
20Northbound exit and southbound entrance
20BSouthbound exit and northbound entrance; also a ramp from I-90 west to I-93 north
20ASouth StationNorthbound exit is part of exit 20
23Purchase StreetNo northbound exit
24AGovernment CenterSigned as exit 23 northbound
24BSouthbound exit and northbound entrance
26, North StationNorth end of Route 3 overlap
27North end of US 1 overlap; northbound exit and southbound entrance
MiddlesexSomerville28
29Signed as exit 30 southbound
Medford
31
32
33
Stoneham34Northbound exit and southbound entrance
35Winchester Highlands, MelroseSouthbound exit and northbound entrance
Woburn36Montvale Avenue - Stoneham, Woburn
Reading37Signed as exits 37A (north) and 37B (south)
Woburn37CCommerce Way, Atlantic Avenue
Wilmington38
39Concord Street
40
41
EssexAndover42Dascomb Road - Tewksbury
43Signed as exits 43A (east) and 43B (west) southbound
44Signed as exits 44A (north) and 44B (south)
45River Road - South Lawrence
Methuen46
47.0747Pelham Street
48
'MA-NH state line'
Rockingham County
Salem11.76Rockingham Park Boulevard TO
NH Route 28, NH Route 38 - Salem
23.00Pelham Road TO
NH Route 38, NH Route 97 - Salem, Pelham
Windham35.78
NH Route 111 - Windham, North Salem
Londonderry411.66
NH Route 102 - Derry, Londonderry
515.24
NH Route 28 - North Londonderry
Hillsborough County
Manchester
joins
19.43
NH Route 101 WEST/I-293 - Manchester Airport, Bedford, Manchester		Route 101 joins northbound and leaves southbound.
620.60Candia Road, Hanover Street
721.31
NH Route 101 EAST - Portsmouth, Seacoast		Route 101 leaves northbound and joins southbound.
leaves
822.01Wellington Road/Bridge Street TO
Merrimack County
Hooksett923.86
US 3/NH Route 28 - Hooksett, Manchester
1025.65
NH Route 3A - Hooksett
joins
26.31
I-293 - Manchester, Nashua		Everett Turnpike continues south on I-293.
1128.66Hackett Hill Road TO
NH Route 3A - Hooksett
Bow35.37
I-89 - Lebanon, White River Junction VT
Concord1236.04
NH Route 3A (South Main Street) - Bow Junction		TO
1337.21
US 3 (Manchester Street) - Downtown Concord
1438.34
NH Route 9 (Loudon Road) - State Offices
designation ends
joins
15A38.87
I-393/US 4/US 202 EAST - Loudon, Portsmouth		US 4 joins northbound and leaves southbound.
15B38.87
US 202 WEST TO
US 3 (North Main Street)
1640.29
NH Route 132 - East Concord
1744.45
US 4 WEST TO
US 3, NH Route 132 - Boscawen, Penacook		US 4 joins southbound and leaves northbound
leaves
Canterbury1847.72West Road TO
NH Route 132 - Canterbury
Northfield1954.80
NH Route 132 - Northfield, Franklin		Northbound exit, southbound entrance.
Belknap County
Tilton2056.72
US 3/NH Route 11/NH Route 132/NH Route 140 - Laconia, Tilton
Sanbornton2260.97
NH Route 127 - Sanbornton, West Franklin
New Hampton2369.01
NH Route 104/NH Route 132 - New Hampton, Meredith
Grafton County
Ashland2475.06
- US 3/NH Route 25 - Ashland, Holderness
Holderness2579.75
NH Route 175A TO Holderness Road - Plymouth
Plymouth2680.64
US 3/NH Route 25/NH Route 3A - Plymouth, Rumney
Campton2783.50Blair Bridge TO
US 3 - West Campton
28
NH Route 49 TO
NH Route 175 - Campton, Waterville Valley
Thornton, New Hampshire2988.29
US 3 - Thornton
Woodstock3094.78
US 3 - Woodstock, Thornton
3197.05Tripoli Road TO
NH Route 175
32100.20
NH Route 112 - Lincoln, North Woodstock
Lincoln33102.23
US 3 - North Woodstock, North Lincoln
Begin Franconia Notch Parkway
joins
34A104.16
105.23
US 3 South - Flume Gorge Park Information Center		No southbound entrance.
Franconia34B110.02Cannon Mountain Tramway - Old Man Historic Site
34C110.82
NH Route 18 - Echo Lake Beach, Peabody Slopes, Cannon Mountain
End Franconia Notch Parkway
35112.36
US 3 North - Twin Mountain, Lancaster		Northbound exit, southbound entrance.
leaves
36112.91
NH Route 141 TO
- South Franconia, Twin Mountain
37115.61
NH Route 18, NH Route 142 - Franconia, Bethlehem		Northbound exit, southbound entrance.
38116.39
NH Route 18/NH Route 116, NH Route 117 - Franconia, Sugar Hill		Also signed southbound as To
Bethlehem39118.95
NH Route 18/NH Route 116 - North Franconia, Sugar Hill		Southbound exit, northbound entrance.
40120.72
US 302, NH Route 18 - Bethlehem, Twin Mountain
Littleton41122.28Cottage Street TO
US 302/NH Route 18/NH Route 116 - Littleton, Whitefield
42124.26
US 302 TO
NH Route 10 - Littleton, Woodsville
43125.88
NH Route 135 TO
NH Route 18 - Littleton, Dalton
44130.07
NH Route 18/NH Route 135 - Monroe, Waterford VT
'NH-VT state line'
Caledonia County
Waterford17.51
VT Route 18 TO
US 2 - St. Johnsbury
11.10
I-91 - St. Johnsbury, White River Junction		Northbound junction only.

Auxiliary routes



★ Manchester, New Hampshire - I-293 - The southernmost portion of this highway, between I-93 and the Everett Turnpike, was once known as Interstate 193.

★ Concord, New Hampshire - I-393

Miscellanea



★ In New Hampshire, between the northern end of I-293 in Hooksett and the beginning of I-89 in Bow, I-93 also carries the northern end of the Everett Turnpike. There is one toll booth along this section, at Exit 11 in Hooksett; toll for passenger cars is 75 cents (50 cents at the ramp toll booth).

★ A section of the highway south of Boston, beginning south of the Savin Hill overpass and ending just before the junction with Route 3, utilizes a "zipper lane", in which a movable barrier carves out a high occupancy vehicle lane in the non-peak side of the highway during rush hour.

★ Hazardous cargoes are now prohibited from I-93 tunnels in Boston.

★ There are two major park and ride facilities off I-93, the Anderson Regional Transportation Center in Woburn, Massachusetts, at Exit 37C, and the Quincy Adams Red Line (MBTA) subway station, at Exit 7 in Quincy.

★ The Big Dig tunnel through Boston has been officially named the Thomas "Tip" O'Neill Tunnel in honor of late Speaker of the House Tip O'Neill who helped pass the legislation that funded the Big Dig.

★ In an attempt to alleviate rush-hour traffic jams, travel in the breakdown lane of I-93 is permitted on a small stretch between Exit 38 and Exit 47/48. This extra travel is permitted on the southbound side on weekdays between 6AM and 10AM, and on the northbound side between 3PM and 7PM. However, on most busy days this fails to prevent traffic delays. The Massachusetts State Police is displeased with this arrangement, citing that traffic in the breakdown lanes interferes with the ability of emergency vehicles to respond to accidents.

See also



★ Zakim Bunker Hill Bridge

References


1. Review Begins After Big Dig Tunnel Collapse

External links



★ I-93 Northern Expressway on Bostonroads.com

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