|Length:||189.95 mi (305.69 km)|
|Existed:||1957 – present|
|South end:||I‑95 / US 1 / Route 128 in Canton, MA|
|North end:||I‑91 in Waterford, VT|
State highways in Vermont
Interstate 93 (I-93) is an Interstate Highway in the New England region of the United States. It begins in Canton, Massachusetts, in the Boston metropolitan area, at I-95; and ends near St. Johnsbury, Vermont, at I-91. It is one of three mainline Interstate highways located entirely in New England, the other two being I-89 and I-91. The largest cities along its route are Manchester, New Hampshire and Boston, Massachusetts. It also passes through the New Hampshire state capital of Concord.
For most of its length, I-93 indirectly parallels U.S. Route 3. Particularly in New Hampshire, the two highways have several interchanges with each other, as well as a concurrency through Franconia Notch State Park.
- 1 Route description
- 2 History
- 3 Future expansion
- 4 Exit list
- 5 Auxiliary routes
- 6 References
- 7 External links
Interstate 93 begins in the south at exit 12 of I-95 in Canton. I-93 begins co-signed with U.S. Route 1 North. At this junction, I-95 North heads to the northwest (co-signed with U.S. Route 1 South, as well as Route 128, which begins at the interchange), to serve as the beltway around Boston, while I-95 South runs by itself southwest through Boston's southwestern suburbs toward Rhode Island.
The first 3 miles (4.8 km) of I-93 run east through Boston's southern suburbs, passing through Canton and Randolph. In Randolph, I-93 meets the northern end of Route 24 (Fall River Expressway/AMVETS Memorial Highway) at Exit 4. I-93 continues east into Braintree, interchanging with Route 3, the major freeway linking Boston to Cape Cod, at Exit 7 (known locally as the "Braintree Split"). Route 3 North joins I-93 and US-1, and the highway turns north toward Boston. These first 7 miles (11 km) of I-93 follows what was formerly part of Massachusetts Route 128 before it was truncated at the current I-95/I-93 junction and many locals still refer to this section of roadway as part of Route 128.
Upon turning northward, the highway is known as the Southeast Expressway through Quincy, Milton and Boston's Dorchester section. After the Massachusetts Avenue connector exit, the highway officially becomes the John F. Fitzgerald Expressway, which is also known as the Central Artery, and passes beneath downtown Boston. A major intersection with the Massachusetts Turnpike/Interstate 90 (Exit 20) takes place just south of downtown Boston. After the massive interchange, motorists use the Thomas P. O'Neill Jr. Tunnel to travel underneath the city and then use Zakim Bunker Hill Bridge to cross the Charles River. Two exits are located in the tunnel, where the speed limit is 45 miles (72 km) an hour. Route 3 leaves the Artery just before the Zakim bridge via Exit 26, and U.S. Route 1 leaves the Artery just after the bridge, via Exit 27 (no southbound access). From Boston through the rest of Massachusetts, Concord, NH appears as the control city on northbound overhead signs. The Artery ends as I-93 continues north out of the city.
I-93 continues through the northern suburbs of Boston, coming in Woburn to a second intersection with Interstate 95 and Route 128, which run in a concurrency. Travelers going north can either change over to I-95 north to eventually reach Maine, or remain on I-93 toward New Hampshire. Farther north, in Andover, I-93 meets I-495, providing access to Worcester to the southwest and New Hampshire's seacoast region to the northeast. Just south of the state line, I-93 crosses the Merrimack River into Methuen, where it interchanges with Routes 110 and 113 at exit 46 just north of the river crossing, where Routes 110 and 113 junction with I-93 at a rotary to be replaced with a partial cloverleaf beginning in mid-2013, with the old rotary set to be demolished in early 2017. I-93 then interchanges with the western end of Route 213, a connector between I-93 and I-495. I-93 then crosses into New Hampshire after about 1 mile (1.6 km).
In all, I-93 has 48 numbered exits in Massachusetts, although several numbers are skipped in and near Boston. One noteworthy reason that some exits were removed from I-93 is to further address traffic problems in addition to converting the Central Artery from six to eight to ten lanes, by reducing the combined number of on- and off-ramps from 27 to 14. Exit 48 in Methuen, just before the New Hampshire state line, is the highest-numbered exit along the entire route. I-93 once had only 22 exits prior to the re-routing of I-95 onto MA 128. Due to the highway being one of the two major Interstates that enter Boston directly (Interstate 90 is the other), nearly the entire length of the highway in Massachusetts carries four lanes in each direction. Average daily traffic volumes on I-93 in the state range from 100,000 vehicles at the New Hampshire border and 150,000 vehicles at the southern end at I-95 to over 200,000 vehicles through Braintree and Quincy.
Interstate 93 travels just over 131 miles (211 km) in the Granite State, around two-thirds of the highway's total distance. Serving as the main interstate route in New Hampshire, it connects the state capital, Concord, and its largest city, Manchester. Beyond Concord are the towns of Tilton, Plymouth, and Littleton. I-93 is known as the Alan B. Shepard Highway, from the Massachusetts line to Hooksett (just north of Manchester at the northern terminus of I-293), as the F.E. Everett Turnpike from Hooksett to Concord, and as the Styles Bridges Highway from Concord to the Vermont line. This section of roadway was constructed between 1961 and 1977.
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 $1 (50¢ at the ramp toll booth). This is the only toll collected along the entire length of Interstate 93. I-93 in New Hampshire is also notable for having state liquor stores serve as rest areas, which are passed just after the toll plaza, traveling north. There are separate stores on both sides of the Interstate for travelers in each direction.
I-93 enters New Hampshire at Salem, where the current reconstruction of the Exit 1 ramps (leading to Rockingham Park) along with the reduction of the freeway from four northbound lanes to two tends to cause traffic backups. A rest area/welcome center is available on the northbound side of the freeway, directly before Exit 1. I-93 remains two lanes wide in each direction for its first 18 miles (29 km), until the split with Interstate 293 and the junction with New Hampshire Route 101 add a third and fourth lane back to the freeway. I-93 and New Hampshire Route 101 run concurrently for about 1 mile (1.6 km) before New Hampshire Route 101 heads directly east as its own freeway, serving Portsmouth and the Seacoast region. I-93 keeps three lanes of traffic in each direction until the junction with Interstate 89, when each side reduces back to two, and remains a four-lane freeway through most of its journey northward, with the only exception being the Franconia Notch section.
It crosses the Merrimack River again before going through the state capital of Concord. In Concord, Interstate 393 heads directly east (co-signed with eastbound U.S. Route 4 and U.S. Route 202), providing another route to the Seacoast region. Westbound U.S. Route 4 joins I-93 and runs concurrently with it until Exit 17 for Penacook, about 5 miles (8.0 km) further north, before exiting westward. Continuing north, I-93 traverses the Lake Winnipesaukee tourist region and makes its way north through the heart of the White Mountains Region. I-93 passes through Franconia Notch State Park as a Super-2 parkway (one lane in each direction) with a 45 miles per hour (72 km/h) speed limit, as a compromise between the government's desire for a four-lane highway and concerns from environmentalists about I-93's impact on Franconia Notch. For the trip through Franconia Notch, I-93 and U.S. Route 3 run concurrently.
Beyond Franconia Notch State Park, U.S. 3 heads northeastward through the Great North Woods region, while I-93 runs to the northwest. The final town along I-93 in New Hampshire is Littleton, served by four exits. Many motorist services are available at Exit 42. After passing through town, it crosses the Connecticut River into Vermont. The last exit along I-93 is exit 44 for Monroe, through which a rest area/welcome center is accessible to travelers on both sides of the highway.
In 2013, a bill was signed by governor Maggie Hassan to raise the speed limit on Interstate 93 from mile marker 45 to the Vermont border to 70 miles per hour (110 km/h). The 70 mph speed limit will take effect from January 1, 2014. This will be the second stretch of Interstate highway in a New England state to have its speed limit raised to at least 70 mph, following Maine's increase of a portion of Interstate 95 north of Bangor to 75 miles per hour (121 km/h) in 2011.
Interstate 93 runs for 11 miles (18 km) in Vermont, with one numbered exit in the state before ending at the interchange with Interstate 91 in St. Johnsbury. A rest area/welcome center is located along the northbound side of the highway for travelers entering from New Hampshire. The final 3 miles (4.8 km) of the Interstate, just before its terminus, actually veer to the southwest. Vehicles bound for Canada can use northbound I-91 to reach the Quebec border crossing at that Interstate's end, and northwards into Canada as an "autoroute" freeway. The portion of I-93 in Vermont parallels both U.S. Route 2 and Vermont Route 18.
The Southeast Expressway in and near Boston was constructed between 1954 and 1959, at the same time the Fitzgerald Expressway (Central Artery) was built. It begins at the Braintree Split and ends at the Thomas P. O'Neill Jr. Tunnel. A section of the Expressway, 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 reversible high occupancy vehicle lane on the non-peak side of the highway during rush hour.
The Central Artery, officially the John F. Fitzgerald Expressway, was a section of highway in downtown Boston constructed in the 1950s and was originally designed as a fully elevated highway. This new highway was greatly disliked by the citizens of the city because it cut the heart of the city in half, cast long, dreary shadows and was an eyesore to the community. Because of the public outcry, Gov. John Volpe ordered the southern half of the highway redesigned so that it was underground; this section became known as the Dewey Square Tunnel. With the cancellation of the highway projects leading into the city in 1972 by Gov. Francis W. Sargent, the Central Artery gained the designation of Interstate 93 in 1974. It has also carried the local highway designations of U.S. 1 (since 1989) and Route 3.
By the mid-1970s, I-93 had outgrown its capacity and had begun to deteriorate due a lack of maintenance. State Transportation Secretary Frederick P. Salvucci, aware of the issues surrounding the elevated roadway, proposed a plan conceived in the early 1970s by the Boston Transportation Planning Review to replace the rusting elevated six-lane Central Artery with a new, more efficient underground roadway. This plan was merged with a long-standing proposal to build a third harbor tunnel to alleviate congestion in the Sumner and Callahan tunnels to East Boston; the new plan became known as the Central Artery/Tunnel Project or the Big Dig.
These new roadways were built during a twelve-year period from 1994 to early 2006. The massive project became the largest urban construction project ever undertaken in American history. Construction on the new I-93 segment was not without serious issues: a lengthly Federal environmental review pushed the start of construction back from approximately 1990, causing many inflationary increases; funding for the project was the subject of several political battles between Pres. Ronald Reagan and Rep. Thomas P. O'Neill, Jr. Major construction on the new roadway was done while maintaining the old roadway, a step that also greatly increased the cost of the project. The original Charles River crossing, named Scheme Z, was the object to great public outcry similar to that of the building of the original highway. The outcry eventually led to the replacement of Scheme Z with a newer, more sleek cable-stayed bridge and complementing exit for Cambridge, increasing the cost even more.
In Downtown Boston, I-93 is now made up of the Thomas P. O'Neill Jr. Tunnel and the Zakim Bunker Hill Bridge, which spans the Charles River. The underground construction of the tunnel system was completed as of October 2006; however, repairs continue to many parts of the tunnel due to water leakage because of improper construction of the slurry walls supporting the O'Neill tunnel. The former route of the above-ground Artery, so named "the other Green Monster" by Mayor Thomas Menino, was replaced mostly by open space known formally as the Rose Kennedy Greenway.
Additional improvements were done in the South Bay section of the highway: The I-90/I-93 interchange was completely redesigned, a new HOV lane extending from the zipper lane in Quincy was added and the South Boston Haul road that was constructed to bypass truck traffic around residential streets in the South End is now open to general traffic.
Hazardous cargoes are now prohibited from I-93 in Boston due to safety issues in the tunnels; these cargoes must now exit at either the Leverett Circle connector in Cambridge when traveling southbound or at the Massachusetts Ave. exit when traveling northbound.
The Northern Expressway was constructed from Medford to the New Hampshire border between 1956 and 1963. It was extended through Somerville and Charlestown to the Central Artery, U.S. Route 1, and the planned route of the Inner Belt between 1965 and 1973. Because it was already under construction, the highway was granted an exception to the moratorium on highway expansion inside Route 128 which was announced in 1970.
Rapid bridge replacement project
In August 2010, in Medford, a 25-by-7-foot (7.6 m × 2.1 m) section of bridge deck on the northbound side partially collapsed due to age-related structural fatigue. The collapse forced the Massachusetts Department of Transportation to evaluate the remaining bridges along the corridor, eventually deciding to replace several bridges along the highway in a plan called 93 Fast 14. MassDOT set in motion a plan to replace the superstructure and concrete decks on 14 overpass bridges along that section of the interstate, using rapid bridge replacement methods. The $98.1 million project replaced bridges originally built in 1957 with a set of prefabricated modular concrete bridges in a series of weekend roadway closures. Traffic was diverted into a series of crossover lanes during construction. The main part of the project took place each weekend from June through August 2011,with the exception of the July 4th holiday weekend. One or two bridges were replaced each weekend during the construction time frame. The project was part of the Commonwealth's Accelerated Bridge Program.
Exit 1 in Salem was originally designed and built with ramps allowing northbound traffic to exit to Rockingham Park 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, which was replaced in August 2012.
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.
A 59-vehicle accident briefly closed the Interstate highway near Derry, at Exit 4, on January 11, 2009. A bus had tried to avoid a car going out of control. There were no major injuries. A 12-vehicle accident occurred the following Sunday, January 18, near the previous week's accident. The pair of accidents has led proponents of widening the highway to urge that there be no more delays in the project.
|This section does not cite any references or sources. (June 2012)|
Construction of Interstate 93 was completed in 1983 in Vermont. It was the last interstate to be built in the state.
|This section requires expansion. (June 2012)|
Since 1996, MassHighway has studied rebuilding the intersection of I-93 and I-95 in Woburn along the border with Stoneham and Reading. The project is expected to start in Spring 2017 and cost $267 million.
Additional plans also seem to be in the works for the roadbed of MA Route 24, running southwards from Exit 4, on the length of I-93 that heads to its southern terminus to be brought up to Interstate standards to allow it to be renamed as a new length of Interstate 93, running southwards to Interstate 195 near Fall River, MA.
The Massachusetts Department of Transportation and its predecessor MassHighway have planned on widening I-93 to a uniform four travel lanes in both directions from the current lane drop near Exit 41 in Wilmington to the New Hampshire border since the beginning of the 2000s. The first section of widening will be done as part of the I-93 Tri-Town Interchange Project. The project will construct a new interchange in Wilmington. I-93 will be widened from 3 to 4 lanes in each direction from Exit 41 to I-495, a distance of approximately 5 miles (8 km), as the first phase in widening I-93 from Exit 41 to the New Hampshire state line. Early estimates of the entire project place the cost at $567 million.
New Hampshire plans
Initial plans to widen I-93 to a uniform four travel lanes in both directions from Salem to Manchester beginning in 2008 were put on hold due to a lawsuit designed to force the NH Department of Transportation to update the plans to include other transportation options. Under orders from US District Court, the NHDOT and US Department of Transportation must provide an updated environmental review. The Conservation Law Foundation (CLF) filed a lawsuit in February 2006, hoping to force any expansion plans in the area to include the restoration of commuter rail service between Manchester and Boston. Despite the suit, the Exit 1 interchange construction was allowed to undergo upgrading and expansion; other associated projects related to the widening, chiefly around Exits 3 and 5, were also eventually allowed to proceed. The whole set of projects were eventually allowed to move forward when an agreement between the state and the CLF that removed the group's opposition to construction which does not pose a threat to the environment.
As part of the 2009 stimulus package, New Hampshire is set to receive several million dollars in highway construction funds. One of the projects will be widening a portion of the highway between the Massachusetts border and Manchester. Bidding is set to begin in February 2009 with construction slated to begin in late 2009 or early 2010. The plans call for the New Hampshire Department of Transportation to widen the southernmost 20 miles (32 km) of I-93 to four lanes in each direction, from the current two. In addition, all five interchanges along this length will be upgraded to accommodate larger amounts of traffic, including replacing many aging bridges. Smaller construction projects at some of the interchanges are already taking place. According to plans filed by the state with US DOT, the project is scheduled to run from 2009 through 2016, with work starting at the Massachusetts line and moving northward to Manchester. The project is designed with an intermodal transit bent; new or improved park and ride facilities deployed at exits 1, 3 and 5 and a widened median strip that is designed to accommodate a planned commuter rail service between Boston and Manchester.
As a way to help defray the costs of the expansion, in early 2010 the NHDOT made a formal request to the Federal Highway Administration to add tolls to I-93 at the Massachusetts-New Hampshire border. The new toll facility was to be located in Salem, New Hampshire, approximately .5 mi (0.80 km) from the state line, and would cost travelers $2 per car. The proposal faced opposition from state legislators in both states who claimed the tolls would cause severe congestion in the area and lead to an economic burden to local residents. Opponents included US senator Scott Brown (R-Massachusetts). The proposal was eventually dropped in favor of issuing new state bonds to pay for expansion. The new policy was laid out by Transportation Commissioner George Campbell after reviewing the proposal and receiving a promise from the MassDOT that it would not be enacting a similar toll on the Massachusetts side of the border.
Exits 17, 19, 21, and 25 in Massachusetts were eliminated as part of the Big Dig.
|Massachusetts||Norfolk||Canton||0.000||0.000||–||I‑95 north / US 1 south / Route 128 north – Dedham, Portsmouth, NH||Southern terminus of I-93 and concurrency with US 1; Exit 12 on I-95; southern terminus of Route 128|
|0.267||0.430||1||I‑95 south – Providence, RI||Southbound exit and northbound entrance|
|1.415||2.277||2||Route 138 – Stoughton, Milton||Signed as Exits 2A (south) and 2B (north)|
|Milton||2.615||4.208||3||Ponkapoag Trail – Houghton's Pond|
|Randolph||3.480||5.601||4||Route 24 south – Brockton, Fall River||Left exit southbound; northern terminus of Route 24; Exit 21 on Route 24|
|4.233||6.812||5||Route 28 – Randolph, Milton||Signed as Exits 5A (south) and 5B (north)|
|Braintree||6.450||10.380||6||Route 37 – West Quincy, Braintree, Holbrook||Northern terminus of Route 37|
|6.802||10.947||7||Route 3 south – Braintree, Cape Cod||Braintree Split; left exit southbound; southern terminus of concurrency with Route 3|
|South end of the Southeast Expressway|
|Quincy||8.182||13.168||8||Furnace Brook Parkway – Quincy|
|Milton||9.162||14.745||9||Adams Street – Milton, North Quincy||Northbound exit and southbound entrance|
|9.410||15.144||9||Bryant Avenue – West Quincy||Southbound exit and northbound entrance|
|10.134||16.309||10||Squantum Street – Milton||Southbound exit only|
|10.832||17.432||11A||Granite Avenue east – East Milton||Southbound exit and northbound entrance|
|10.842||17.449||11B||Granite Avenue west to Route 203 – Ashmont||Signed as Exit 11 northbound; no northbound entrance|
|Suffolk||Boston||11.575||18.628||12||Route 3A south – Neponset, Quincy||No northbound exit|
|12.456||20.046||13||Freeport Street – Dorchester||Northbound exit only|
|12.728||20.484||14||Morrissey Boulevard – JFK Library||Northbound exit and southbound entrance|
|14.343||23.083||15||Columbia Road – Edward Everett Square, JFK Library|
|14.820||23.850||16||Southampton Street – Andrew Square||Northbound exit and southbound entrance|
|18||Frontage Road / Massachusetts Avenue – Roxbury, Andrew Square|
|North end of the Southeast Expressway
South end of the John F. Fitzgerald Expressway
|15.340||24.687||20||I‑90 / Mass Pike – Logan Airport, Worcester, South Station||Northbound exit and southbound entrance; Exits 24A/C on I-90|
|South end of the Thomas P. O'Neill Jr. Tunnel|
|17.253||27.766||20A||South Station||Southbound exit and northbound left entrance; formerly Exit 22; Exit 24C on I-90|
|20B||I‑90 / Mass Pike west / Albany Street||Southbound exit and northbound entrance; Exit 24B on I-90|
|16.694||26.866||22||Surface Road – Chinatown||Southbound entrance only|
|17.340||27.906||23||Government Center||Northbound exit and southbound entrance|
|17.487||28.143||23||Purchase Street||Southbound exit and entrance only|
|17.874||28.765||24A||Government Center||Southbound exit only|
|24B||Route 1A north – Logan Airport||Southbound exit and northbound entrance|
|North end of the Thomas P. O'Neill Jr. Tunnel
Leonard P. Zakim Bunker Hill Memorial Bridge over the Charles River
|26||Route 3 north / Route 28 (Storrow Drive) – Leverett Circle, Cambridge, North Station||Leverett Connector; signed as Storrow Drive northbound; northern terminus of concurrency with Route 3|
|18.603||29.939||27||US 1 north (Tobin Bridge) – Revere||Northbound left exit and southbound entrance; northern terminus of concurrency with US 1|
|North end of the John F. Fitzgerald Expressway|
|Middlesex||Somerville||19.230||30.948||28||To Route 99 – Sullivan Square, Somerville||Northbound exit only|
|20.415||32.855||Sullivan Square, Charlestown, Assembly Square||Southbound exit only|
|20.259||32.604||29||Route 28 / Route 38 north – Somerville, Medford||Northbound exit and southbound entrance; southern terminus of Route 38|
|Medford||21.323||34.316||30||Route 38 – Medford, Somerville||Southbound exit and northbound entrance|
|21.743||34.992||31||Route 16 west (Mystic Valley Parkway) – Arlington||Northbound signage|
|21.859||35.179||Route 16 east – Everett, Revere||Southbound signage|
|22.554||36.297||32||Route 60 – Medford, Malden||Also to Route 16 west southbound; to Tufts University's Medford/Somerville Campus|
|23.229||37.383||33||Route 28 (Fellsway West) – Winchester||Roosevelt Circle|
|Stoneham||25.276||40.678||34||Route 28 north – Stoneham, Melrose||Northbound exit and southbound entrance|
|26.087||41.983||35||Park Street – Stoneham, Melrose||Southbound exit and northbound entrance|
|Woburn||26.929||43.338||36||Montvale Avenue – Stoneham, Woburn|
|I‑95 / Route 128 – Peabody, Waltham||Split into exits 37A (north) and 37B (south); Also exits 37A-B on I-95 / Route 128|
|Woburn||29.965||48.224||37C||Commerce Way / Atlantic Avenue – Anderson RTC|
|Wilmington||31.136||50.109||38||Route 129 – Reading, Wilmington|
|32.635||52.521||39||Concord Street – Wilmington|
|34.064||54.821||40||Route 62 – North Reading, Wilmington|
|34.629||55.730||41||Route 125 – Andover, North Andover|
|Essex||Andover||37.682||60.643||42||Dascomb Road – Tewksbury, Andover|
|39.196||63.080||43||Route 133 – Andover, North Tewksbury||Signed as Exits 43A (east) and 43B (west) southbound|
|40.521||65.212||44||I‑495 – Lawrence, Lowell||Split into exits 44A (north) and 44B (south); Exits 40A-B on I-495|
|42.423||68.273||45||River Road – South Lawrence|
|Andover–Methuen line||43.139||69.425||Merrimack River|
|Methuen||43.465||69.950||46||Route 110 / Route 113 – Lawrence, Dracut||Ramps use Methuen Rotary (will be converted into a full junction by 2016)|
|45.483||73.198||48||Route 213 east (Loop Connector) – Methuen, Haverhill||Western terminus of Route 213; Exit 1 on Route 213|
|Massachusetts–New Hampshire state line|
|New Hampshire||Rockingham||Salem||1.76||2.83||1||Rockingham Park Boulevard to NH 28 / NH 38 – Salem||Originally northbound exit, southbound entrance only|
|3.00||4.83||2||Pelham Road to NH 38 / NH 97 – Salem, Pelham|
|Windham||5.78||9.30||3||NH 111 – Windham, North Salem|
|Londonderry||11.66||18.76||4||NH 102 – Derry, Londonderry|
|15.24||24.53||5||NH 28 – North Londonderry|
|Hillsborough||Manchester||19.43||31.27||–||I‑293 north / NH 101 west – Bedford, Manchester, Manchester Airport||Southern terminus of I-293; Southern terminus of concurrency with NH 101|
|20.60||33.15||6||Candia Road / Hanover Street||Northbound entrance to NH 101 only; Southbound exit from I-93 only|
|21.31||34.30||7||NH 101 east – Portsmouth, Seacoast||Northern terminus of concurrency with NH 101|
|22.01||35.42||8||Wellington Road / Bridge Street to NH 28A|
|Merrimack||Hooksett||23.86||38.40||9||US 3 / NH 28 – Hooksett, Manchester||Split into exits 9N (north) and 9S (south)|
|25.65||41.28||10||NH 3A – Hooksett|
|26.31||42.34||–||I‑293 south / Everett Turnpike south – Manchester, Nashua, Manchester Airport||Northern terminus of I-293; Southern terminus of concurrency with the Everett Turnpike|
|28.66||46.12||11||Hackett Hill Road to NH 3A – Hooksett||Hooksett Ramp Toll Plaza ($1.00 Cash, $0.70 NH E-ZPass)|
|Hooksett Main Toll Plaza ($1.00 Cash, $0.70 NH E-ZPass)|
|Bow||35.37||56.92||–||I‑89 north – Lebanon, White River Junction, VT|
|Concord||36.04||58.00||12||NH 3A (South Main Street) to I‑89 – Bow Junction||Split into exits 12S (south) and 12N (north)|
|37.21||59.88||13||US 3 (Manchester Street) – Downtown Concord|
|38.34||61.70||14|| NH 9 (Loudon Road) – State Offices
|Northern terminus of the Everett Turnpike
Southern terminus of Styles Bridges Highway
|38.87||62.56||15E||I‑393 east / US 4 east / US 202 east – Loudon, Portsmouth||Western terminus of I-393; Southern terminus of concurrency with US 4|
|38.87||62.56||15W||US 202 west to US 3 (North Main Street) – Downtown Concord|
|40.29||64.84||16||NH 132 – East Concord|
|44.45||71.54||17||US 4 west to US 3 / Hoit Road to NH 132 – Penacook, Boscawen||Northern terminus of concurrency with US 4.Also, this will be the starting point for the I-93 north and ending point of the I-93 south of a 70 mph speed limit that will go into effect from January 1, 2014|
|Canterbury||47.72||76.80||18||West Road to NH 132 – Canterbury|
|Northfield||54.80||88.19||19||NH 132 – Northfield, Franklin||Northbound exit and southbound entrance|
|Belknap||Tilton||56.72||91.28||20||US 3 / NH 11 / NH 132 / NH 140 – Laconia, Tilton|
|Sanbornton||60.97||98.12||22||NH 127 – Sanbornton, West Franklin|
|New Hampton||69.01||111.06||23||NH 104 / NH 132 – Meredith, New Hampton|
|Grafton||Ashland||75.06||120.80||24||US 3 / NH 25 – Ashland, Holderness|
|Holderness||79.75||128.35||25||NH 175A (Holderness Road) – Plymouth|
|Plymouth||80.64||129.78||26||US 3 / NH 25 / NH 3A south – Plymouth, Rumney||Northern terminus of Route 3A|
|Campton||83.50||134.38||27||US 3 – West Campton|
|86.61||139.39||28||NH 49 to NH 175 – Campton, Waterville Valley|
|Thornton||88.29||142.09||29||US 3 – Thornton|
|Woodstock||94.78||152.53||30||US 3 – Woodstock, Thornton|
|97.05||156.19||31||Tripoli Road to NH 175|
|100.20||161.26||32||NH 112 – Lincoln, North Woodstock|
|Lincoln||102.23||164.52||33||US 3 – North Woodstock, North Lincoln|
|South end of the Franconia Notch Parkway|
|34A||US 3 south – Flume Gorge, Park Information Center||Southern terminus of concurrency with US 3; No southbound entrance|
|Franconia||110.02||177.06||34B||Cannon Mountain Tramway – Old Man Historic Site|
|110.82||178.35||34C||NH 18 north – Echo Lake Beach, Peabody Slopes, Cannon Mountain||Southern terminus of NH 18|
|North end of the Franconia Notch Parkway|
|112.36||180.83||35||US 3 north – Twin Mountain, Lancaster||Northern terminus of concurrency with US 3; Northbound exit and southbound entrance|
|112.91||181.71||36||NH 141 to US 3 – Twin Mountain, South Franconia|
|115.61||186.06||37||NH 18 / NH 142 – Franconia, Bethlehem||Northbound exit and southbound entrance|
|116.39||187.31||38||NH 18 / NH 116 / NH 117 / NH 142 – Franconia, Sugar Hill||NH 142 not signed northbound|
|Bethlehem||118.95||191.43||39||NH 118 / NH 116 – North Franconia, Sugar Hill||Southbound exit and northbound entrance|
|120.72||194.28||40||US 302 / NH 18 – Bethlehem, Twin Mountain|
|Littleton||112.28||180.70||41||Cottage Street to US 302 / NH 11 / NH 116 – Littleton, Whitefield|
|124.26||199.98||42||US 302 / NH 10 to NH 18 – Littleton, Woodsville|
|125.88||202.58||43||NH 135 to NH 18 – Littleton, Dalton|
|130.07||209.33||44||NH 18 / NH 135 – Monroe, Waterford, VT||Cars will enter New Hampshire from Vermont from a 65 mph speed limit to a 70 mph speed limit|
|New Hampshire–Vermont state line|
|Vermont||Caledonia||Waterford||7.51||12.09||1||VT 18 to US 2 – St. Johnsbury|
|11.10||17.86||–||I‑91 – St. Johnsbury, White River Junction||Northern terminus of I-93|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi
- 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
- Federal Highway Administration (October 31, 2002). "FHWA Route Log and Finder List: Table 1". Retrieved March 28, 2007.
- Google Inc. "Interstate 93". Google Maps (Map). Cartography by Google, Inc. http://maps.google.com/maps?hl=en&ie=UTF8&ll=42.208621,-71.13759&spn=0.019454,0.053215&t=h&z=14. Retrieved June 8, 2009.
- Google Inc. "Interstate 93". Google Maps (Map). Cartography by Google, Inc. http://maps.google.com/maps?f=q&hl=en&geocode=&q=I-93&sll=42.009555,-71.71815&sspn=1.910206,3.405762&ie=UTF8&ll=44.398498,-72.012548&spn=0.01435,0.026608&t=h&z=15. Retrieved June 8, 2009.
- "Office of Transportation Planning – 2005 Road Inventory". Executive Office of Transportation. Retrieved August 29, 2007.
- "New Hampshire DOT Route Logs". New Hampshire Department of Transportation. Retrieved August 29, 2007.
- "VTrans Traffic Log". Vermont Agency of Transportation. Archived from the original on August 11, 2007. Retrieved August 29, 2007.
- "Methuen Rotary Project: Home". MassDOT. Massachusetts Department of Transportation (MassDOT). Retrieved 8 December 2012.
- "404". Retrieved September 25, 2014.
- "Alps' Roads I-93 Photos". Alps' Roads. Retrieved 18 November 2012.
- "Traffic Counts for Rte. I-93". Massachusetts Highway Department. Retrieved September 14, 2008.
- "Traffic Counts for Rte. 1 & I-93". Massachusetts Highway Department. Retrieved September 14, 2008.
- "Alan B Shepard Highway (I-93)". Retrieved September 25, 2014.
- "Review Begins After Big Dig Tunnel Collapse". CNN. July 12, 2006. Archived from the original on July 15, 2006. Retrieved July 25, 2006.
- "Northern Expressway (I-93)". Bostonroads.com. Retrieved 2013-01-29.
- Moskowitz, Eric (August 4, 2010). "Officials expect I-93 north lanes in Medford to be open for a.m. commute". Boston Globe. Retrieved August 5, 2010.
- "I-93 Medford Bridges: 93Fast14 Video". Massachusetts Department of Transportation. May 5, 2011. Retrieved June 20, 2011.
- "MassDot Accelerated Bridge Program: About the program". Massachusetts Department of Transportation. Retrieved June 20, 2011.
- Associated Press (January 12, 2009). 59-vehicle pileup closes I-93. Burlington Free Press.
- Sherm Packard, NH State Representative (January 30, 2009). "Widening I-93 is now an urgent priority". The Concord Monitor. Retrieved February 6, 2009.
- "I-93\I-95 Interchange Transportation Study". Retrieved October 4, 2014.
- http://www.mhd.state.ma.us/ProjectInfo/Main.asp?ACTION=ViewProject&PROJECT_NO=605605 Missing or empty
- Timmins, Steve. "personal correspondence" (Microsoft Word DOC). Mass Highway.
- "I-93/Lowell Junction Development Area Background". Retrieved October 4, 2014.
- Anderson, Steve. "Northern Expressway". BostonRoads.com. Retrieved May 22, 2010.
- James Vaznis (August 31, 2007). "I-93 widening in N.H. set back". The Boston Globe. Retrieved October 14, 2007.
- Davidson, Kate (August 24, 2008). "I-93 projects move forward, not sideways". Concord Monitor. Retrieved September 13, 2008.[dead link]
- John Distaso (February 18, 2009). "NH hustles for its slice of stimulus pie". New Hampshire Union Leader. MSNBC. Retrieved February 20, 2009. "The biggest project on its list, the $31 million widening of Interstate 93 from Salem to Manchester, will be advertised on Feb. 24, Jannelle said."[dead link]
- NH Department of Transportation. "Rebuilding 93:Salem to Manchester – Project background". NH DOT. Retrieved August 23, 2009.
- Date, Terry (February 23, 2010). "NH, Massachusetts lawmakers speak against I-93 toll". Eagle-Tribune. Retrieved May 22, 2010.
- Landrigan, Kevin (March 20, 2010). "Tolls nixed to pay for I-93 widening". Nashua Telegraph. Retrieved May 22, 2010.
- MassDOT Planning Division. "Massachusetts Route Log Application". Massachusetts Department of Transportation. Retrieved August 23, 2014.
- "New Hampshire Mile Marker Locations". nhtrafficcams.com. Retrieved May 23, 2010.
- Massachusetts Department of Transportation. "Exit Numbers and Names: Route I-93 (Canton to Route US 1)". Retrieved August 23, 2014.
- Massachusetts Department of Transportation. "Exit Numbers and Names: Route I-93 (Route US 1 to Methuen)". Retrieved August 23, 2014.
- Google Maps (October 2013). "Street View". Google. Retrieved August 23, 2014.
- Google Maps (September 2013). "Street View". Google. Retrieved August 23, 2014.
|Wikimedia Commons has media related to Interstate 93.|
- John F. Fitzgerald Expressway/Central Artery (I-93)
- Alan B. Shepard Highway (I-93)
- Everett Turnpike (US 3, I-293, and I-93)
- New Hampshire's official site on the rebuilding and expansion of I-93 south of Manchester