Massachusetts Interstate Highway Exit Lists*

Current and Proposed Future Numbers (plus US Routes)

Plan for new I-90/MassPike 1-Mile Advance overhead sign, from MassDOT

2015 Plan for new 1 Mile Overhead Sign for I-295/I-395/MA 12 Exit on Mass Pike/I-90 West (courtesy of MassDOT), the sign now will be installed with the current exit number, 10 (1,3)

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.

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 State Highway Administrator, Tom Tinlin is 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. (4)

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.

When/If the project starts it will not change exit signs, but will replace the numbers on the exit tabs, as shown in these diagrams from MassDOT(3).:

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

Earlier, on October 27, 2015 MassDOT posted two files to the Project 608024 bid page which contained the future 'proposed' exit numbers. The proposed numbers are, for the most part, based on a 'round down' philosophy. Thus the first exit, if at mile 0.2 would be Exit 0, while an exit between miles 1.01 and 1.99 would be Exit 1, etc. Each exit will also have signs indicating what the former exit number was which will be posted for two years:

Plan image of Formerly Exit XX signage, from MassDOT

The following lists have the current number and the 2015 proposed exit number, based on the numbers in the contract documents, for each interstate highway listed:


I-84 shield from wikimediaInterstate 84                         


I-90 shield from wikimedia Mass Pike logo shield from wikimedia Interstate 90 (Mass Pike) ** I-190 shield from wikimedia Interstate 190         I-290 shield from wikimedia    Interstate 290


I-91 Shield, from WikimediaInterstate 91                        Interstate 291 Shield from wikimedia  Interstate 291         I-391 shield from wikimedia    Interstate 391    


I-93 shield from wikimedia Interstate 93


I-95 shield from wikimedia Interstate 95             Interstate 195 Shield from wikimedia Interstate 195     I-295 shield from wikimedia  Interstate 295  

I-395 shield from wikimediaInterstate 395        I-495 shield from wikimedia Interstate 495


US Routes

US 3 shield image from wikimedia  US 3, Burlington to NH Border


US 6 shield image from wikimedia US 6 / Mid-Cape Highway, MA 3 to MA 28 in Orleans(2)

*Updated 10/7/15 with numbers from official MassDOT sign plans

**Updated 11/26/15 with recommendations on revised exit numbers for certain routes.

(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) MassDOT has said they will not renumber these exits due to community opposition, at least initially, visit page for more information. 

(3) 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.'

(4) 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

Check out Proposed Future Exits for MA Route Expressways

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Site Created: December 10, 2013

Site Updated: February 9, 2017

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