Massachusetts Interstate Highway Exit Lists*

Current and Future Numbers (plus US Routes)

2-Miles advance sign for I-93 exits with new milepost based exit numbers, December 2020

On November 18, 2019 MassDOT announced it would convert the state's limited access highway exit numbers to the Geographic Reference or Milepost Exit Numbering system between late summer 2020 and late spring 2021. This follows a four year delay for the project originally announced in fall of 2015 (Project No. 608024) that would have converted the state's limited access highway's exit numbers in 2016 and 2017. The new project appears to be similar to the earlier one in that it will start converting exits west to east (and each highway north to south or east to west) over probably a 2 year period. Differences include that it will be proceeded by a public information campaign and the creation of a new website that will provide information on the new exit numbers. Also, this project will not include routes where exits are not numbered, such as US 1 and MA 28 or for I-291, I-391, MA 213 and the Lowell Connector, due to the small number and/or close proximity of the exits. On September 10, MassDOT announced the project would start in mid-October (originally it was to start in late summer) and would be finished by the summer of 2021.

When the project starts in October 2020, up to 3 work crews at a time will not change exit signs, but will replace the numbers on the exit tabs and gore signs, as shown in these diagrams from MassDOT2:

MassDOT plan image of proposed method of changing exit numbers on existing signsMethod of changing exit numbers on older highway signs, from MassDOT

On November 19, 2019 MassDOT unveiled a website (newmassexits.com) with its own logo:

Reduced size image of MassDOT Exit Renumbering Project logo

which contained the future 'proposed' exit numbers. The proposed numbers are mostly, unlike those from the postponed 2016 project which were determined using a 'round down' philosophy, based on simple rounding (below .5 down, for .5 and above, up). They also eliminated the proposed use of Exit 0 which reduced the need for many lettered exits for many routes. Each exit will also have signs indicating what the former exit number was which will be posted for two years, but unlike the proposed 2016 sign:

Plan image of Formerly Exit XX signage, from MassDOT

They will adopt similar signs as Rhode Island and Connecticut (MassDOT images):

MassDOT image of what future Old exit tabs will look like during 2020 exit renumbering projectSample exit sign showing yellow old exit tab sign on bottom

Public hearings will be held to get citizen comments through March 2020. I attended the February 11 meeting in Boston, with only 1 other person, who was a MassDOT sign engineer, therefore I was the only 'general public' representative along with 6 other MassDOT employees, part of the renumbering project team. The officials reaffirmed what was presented on the exit renumbering project website, that the work will start in late summer, that it will start with I-91 and end with US 6 on the Cape. That the Cape will get US 6 mileage exits, despite their complaints, and that the project should be completed by the spring of 2021. The sign engineer asked about current sign replacement contracts. The answer was if the project timetable has signs going up before the exit renumbering project starts, they will have the current sequential numbers and the renumbering project would change them later. At a later meeting in Hyannis on February 25, a handful of people showed up, all but 1 opposing the exit renumbering of US 6, details in this Cape Cod Times article. Additional public meetings were to be held in Springfield (March 24), Leominster (April 14), and Peabody (April 28), but these were all canceled due to the COVID-19 virus. Instead, MassDOT invited citizens still curious about the project to take advantage of the information of the agency's website.

On February 2020, MassDOT split the renumbering project into 3 contracts: Divisions 1-3 (Contract 610646 covering the western and central parts of the state), Divisions 4-6 (Contract 610799, for the northeastern and southeastern sections and Boston) and a separate one for the Mass Pike (Contract 610800). The first contract had its final plans sent to MassDOT management on March 19, 2020, the second on April 4, and the third on April 6. The contracts were all advertised in May, with winning bid announcements to take place over a 4 week period. The first contract (Districts 1-3) was advertised on May 9 with a July 7 winning bidder announcement date. The second was advertised on May 16 for a June 23 announcement at which RoadSafe Traffic Systems of Avon, MA was declared the winning bidder. The third was advertised on May 30 with a July 21 announcement date. All the contracts should have been let by the end of July or early August. The COMMBUYS site has a page for each advertised contract with additional project documents that the public can access: Districts 1-3, Districts 4-6, and for the MassPike.

The following lists have the current exit number and the proposed future number, based on the those listed on the state's exit renumbering project website and subsequent files posted as part of the contract advertising process, for each interstate highway and US Route listed, ERC=Exit Renumbering Contract (1-Winning bidder-Liddell Bros., Work to start in January 2021), (2-Winning bidder-Roadsafe Traffic Systems June 23, Work started Oct. 18, 2020), (3-Winning bidder-Liddell Bros. July 21, Work to start on Dec. 13, 2020), (NA-Not to be Renumbered):


I-84 shield from wikimediaInterstate 84     (ERC1)             


I-90 shield from wikimedia Mass Pike logo shield from wikimedia Interstate 90 (Mass Pike)  (ERC3-Exit Renumbered Dec. 13, 2020-Jan. 15, 2021)^ I-190 shield from wikimedia Interstate 190    (ERC1)        

                       I-290 shield from wikimedia    Interstate 290* (ERC1)


I-91 Shield, from WikimediaInterstate 91  (ERC1)                      Interstate 291 Shield from wikimedia  Interstate 291    (NA)      I-391 shield from wikimedia    Interstate 391    (NA)


I-93 shield from wikimedia Interstate 93* (ERC2)


I-95 shield from wikimedia Interstate 95*    (ERC2)      Interstate 195 Shield from wikimedia Interstate 195*    (ERC2- All Exits Renumbered as of November 23, 2020)^

I-295 shield from wikimedia  Interstate 295*  (ERC2-All Exits Renumbered as of January 5, 2021)^

 I-395 shield from wikimediaInterstate 395   (ERC1)     I-495 shield from wikimedia Interstate 495  (ERC1)


US Routes

US 3 shield image from wikimedia  US 3, Burlington to NH Border* (ERC2 - Exit Renumbering started January 20)


US 6 shield image from wikimedia US 6 / Mid-Cape Highway, MA 3 to MA 28 in Orleans (ERC2- All Exits Renumbered as of December 24, 2020)^

^Check out images of newly renumbered exit signs at New England Exit Renumbering Central

*With information based on responses to comments sent to MassDOT, 12/4/19.

(1)To see more original sign plans with the proposed numbers, for all exits between 1 and 20, Visit the I-90 / Mass Pike Photo Gallery.

(2) Taken from p. A00803-5 from Project 608024, Project Drawings and Detail Sheets, Part 1, MassDOT, Highway Division, downloaded from:

https://www.commbuys.com/bso/external/bidDetail.sdo?docId=BD-16-1030-0H100-0H002-00000005477&external=true&parentUrl=bid, Link under 'File Attachments.'

(3) Post by Roadman in AARoads Forum, Northeast Group, I-90 / Mass Pike Signing Work thread, 10/4/2016, downloaded from: http://www.aaroads.com/forum/index.php?topic=16222.125

(4) Available at http://vtrans.vermont.gov/sites/aot/files/planning/documents/planning/2018STIPFinal.pdf Exit conversion project listed on p. 30.

History of the Exit Renumbering Project postponement in 2016

On November 17, 2015 MassDOT announced the lowest bid on a contract (Project No. 608024)  that would have converted the state's interstate and US Route freeway's exit numbers to the Geographic Reference or Milepost Exit Numbering system. Liddell Bros., Inc. of Halifax, MA, they were to have been award the contract by December 2015. The project was suspended indefinitely in the spring of 2016.

UPDATE 6/7/19: MassDOT Reconsidering Milepost Based Numbers? Plans released for the recently started I-95 Attleboro to Norwood Sign Replacement Project have the existing sequential numbers but feature the following note:

MassDOT note on I-95 sign plans indicating need to check on current numbers before sign manufacture

Signs are not probably to be manufactured until at least mid-2020. Does this mean a possible change in policy in the next year or so? For images of the new I-95 sign plans, visit the I-95 in MA Photo Gallery.

UPDATE 5/18/18: While Massachusetts may not be moving forward on milepost based numbering, Rhode Island and Vermont are. On August 25, 2017 the winning bidder for a contract that will renumber exits on I-295 and RI Route 99 was announced. Guess who? Liddell Bros. of Halifax MA. Unlike in Massachusetts, they did post the new numbers in December 2017, photos are here. In April 2017, Vermont's State Transportation Improvement Plan was published and included moneys to start a public information campaign in 2018 to alert drivers as to a change in exit numbers. The project itself is due to start in 2020.4 Maybe these moves will get Massachusetts to look at starting their project again.

UPDATE 8/6/17: A Massachusetts legislator has filed a bill to make the state adopt milepost exit numbers for its interstates and other expressways according to this report from NPR Radio. MassDOT still says matter is under evaluation (as they have said since 2015). I forwarded information from this website, in case he was unaware of MassDOT's actions over the past couple years, he thanked me for the info.

UPDATE 10/5/16: MassDOT appears to have indefinitely postponed the Milepost Exit Numbering project. Work was to start in January 2016 to convert highway exit numbers, first in the western part of the state then working eastward (except for numbers on the Mass. Turnpike/I-90 which will be changed under another contract) with a completion date for the entire project of early 2018. However, it appears the start of work is now on hold indefinitely, with no specific start date announced. This appears to be the results of feedback from politicians and the public after news of the project got out. Officials on Cape Cod were publicly critical of MassDOT's plan (see this article in the Cape Cod Times) and the then State Highway Administrator, Tom Tinlin was quoted in a Worcester Telegram & Gazette article in February saying he had not yet signed off on the project. On April 27, 2016 it was reported that the numbers on US 6 would not be changed and that the rest of the project was still being evaluated.2 In a June public meeting, officials said the existing exit numbers would be used, but that the new exit tabs and gore signs would be designed to be able to use larger milepost based numbers some time in the future. Back in April 2016, MassDOT announced the winning bidder for a project to replace exit signs on I-495. This contract was modified to include a clause whereby the state would inform the contractor whether to use milepost based numbers or keep the sequential numbers for the new signs. 

On October 1, 2016 MassDOT re-advertised a project first advertised in 2015 that would have replaced exit signs in the Big Dig and Mass Pike tunnels in Boston with those with new numbers. Based on a website forum comment from a MassDOT sign engineer, the new contract is reduced in scope, only installing new signs with the existing numbers, if they are damaged and need replacing, but like with US 6, any new signs will be designed to display milepost based numbers, if and when a switch is made. He also indicated that for the time being, this will be standard operating procedure for new signage replacement contracts. Signs on the Mass Pike to be replaced in 2017-18, designed for the use of milepost numbers, will use the current sequential numbers as well.3

Earlier, a MassDOT official quoted in this July 29 Article in the Cape Cod Times says “We continue to evaluate what would be in the best interest of Massachusetts taxpayers and drivers with the federal government’s milepost-based exit numbering initiative,” “Logistically, there are many questions which still need to be answered concerning how Massachusetts would transition to distance-based numbering and what the potential impacts could be on the communities we serve." For more details about the reluctance by MassDOT to start the conversion, see This Blog Post.

Check out Proposed Future Exits for MA Route Expressways

Check out Photos From Other Mass Highways

Check out MassDOT's Current and Planned Sign Replacement Contracts Through 2024 (Updated 9/8/20)

Back to Massachusetts Highways for the 21st Century

Site Created: December 10, 2013

Site Last Updated: January 20, 2021

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