Route Expressway Exit Lists
and Proposed Future Exit Numbers*
On November 17,
2015 MassDOT announced the lowest bid on a contract (Project No. 608024)
that would convert the state's limited access highway's exit numbers to
the Geographic Reference or Milepost Exit
Numbering system. The lowest bidder, Liddell Bros. Inc of Halifax,
MA, was to have been awarded the contract in December 2015.
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).
10/5/16: It appears MassDOT has indefinitely postponed
work to change exit numbers to those based on highway mileposts. 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, 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
in the Cape Cod Times) and the State Highway Administrator, Tom
Tinlin is quoted in a Worcester
Telegram & Gazette article saying he had not yet signed off
on the project. In a public meeting in June, officials indicated the
existing exit numbers would be used on the new signs, but that the
exit tabs and gore signs would be designed to hold the larger milepost
numbers if converted sometime in the future. Back in April, MassDOT
announced the winning bidder for a project to replace exit signs on
I-495. The 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 at a later time.
On October 1, MassDOT re-advertised a project
first advertised last year 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 will now install signs with the existing numbers, but like
with US 6, the 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 designed for the use of
milepost numbers will use the current sequential numbers as well. (1)
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
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(2):
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. The following lists
have the current number and the proposed exit number, based on the
numbers in the 2015 contract documents, for each state highway listed:
Massachusetts Route Expressways with exit numbers are included in this
list. As of now, MassDOT does not plan to add milepost exit numbers to
highways without existing exit numbers, with the exception of MA 28 on
the Cape and the MA 57 expressway near Springfield, when highway exits
are converted to milepost based numbering.
Lists include suggestions as to how
some of the proposed exit numbers may be changed to more accurately
reflect the mile posts.
(1) Post by
Roadman in AARoads Forum, Northeast Group, I-90 / Mass Pike Signing Work
thread, 5/10/2016, downloaded from:
(2) Taken from p.
A00803-5 from Project 608024, Project Drawings and Detail Sheets, Part
1, MassDOT, Highway Division, downloaded from:
Link under 'File Attachments.'
Check Out Other Exit Lists:
Site Created: February 10, 2014
Last Updated: August 9, 2017
2013-2016 Robert H. Malme