Completed Project

MassDOT’s Exit Renumbering Project is now complete. Beginning in 2022, please visit this site for additional information on the project.

Project Description

The Massachusetts Department of Transportation (MassDOT) is converting all exit numbers on freeways to a milepost-based numbering system, per Federal Highway Administration (FHWA) requirement. Currently, interstates and freeways in Massachusetts utilize a sequential exit numbering method. MassDOT has committed to the implementation of mile-based with construction scheduled to begin in Fall 2020.


Tap to activate the map, then zoom in or out and click a dot on the map to see the new exit numbers. New exit signage will include “Old Exit” signs for a minimum of two years to help the public get acquainted with the new system. Old and new exit numbers for each corridor can also be found in each of the links below. Exit numbers for Route 213, I-291, I-391, and the Lowell Connector will not be changing.

To view new exit numbering on each corridor, click below:

Frequently Asked Questions



What are the benefits to a milepost-based exit numbering system?

This new system provides several advantages to the existing sequential numbering system: 

  • Driver friendly navigation
    • Allows drivers to quickly determine distances to destinations
    • Miles traveled can be calculated more easily
  • More accurate emergency response
    • Improves reporting of highway incidents, resulting in better navigation of emergency services
  • National uniformity
    • Same exit numbering scheme as almost all other states
  • Easier to add future exits without renumbering entire corridor

How will the program be paid for?

The project, which is estimated to cost $2.8 million, will be paid for through Federal Highway Safety Improvement Program (HSIP) funds. HSIP funding carries a 90/10 split, which means that 90% of the project will be funded through federal funds and the remaining 10% will be funded through state highway funds.

Will there be any traffic impacts?

We anticipate only minimal impacts to traffic during construction. The public will be notified in advance of construction start and MassDOT will use electronic changeable message signs to alert motorists along the route of the pending changes.


MassDOT will update all recreational and cultural interest signage to reflect the new exit numbering system.

What is MassDOT doing to notify the public of this conversion?

MassDOT is conducting an extensive public outreach campaign to notify the public of the new numbering system. Outreach includes in-person and online communication strategies that will give the public ample opportunity to learn about the project and ask questions prior to construction.

Which highways will get new exit numbers?

The requirement to use milepost-based exit numbers applies to all highways with exits, such as Interstates and other freeways. In Massachusetts, all of these highways are owned by MassDOT.

What will the new exit signs look like?

Exit signage panels  will remain the same, just the numbers themselves will change. “Old Exit #” signs, which will have a yellow background with black lettering, will be installed at  key locations for a minimum of 2 years.

When will new signs be installed and how will I know when construction on my route is beginning?

Conversion of exit numbers is anticipated to begin in the Fall of 2020. The calendar on this site will remain up-to-date during construction with dates and times of signage installation. Use the Comment Form to sign-up for regular project updates.


Businesses that reference existing exit numbers in their advertising or marketing materials (i.e. flyers, brochures, signs, tec.) will need to revise these materials.  “Old Exit #” signs will be installed under this program and will remain in place for a minimum of 2 years, giving businesses time to adjust to the new exit numbers and during this transition period.

How can I submit my questions?

Use the below link to submit questions and sign up for the project’s mailing list. 
Comment Form

Why are Route 213, I-291, I-391 and the Lowell Connector being excluded from this project?

Route 213, I-291, and I-391 exit numbers will not be changing as those corridors are short and have exits that are generally spaced in 1-mile increments.  The Lowell Connector exit numbers will not be changing as there are no mile markers currently posted along the corridor.

Why are the exit numbers continuing from I-395 through I-290?

MassDOT is continuing the I-395 numbering along I-290 to replicate the present exit numbering, which is continuous from Webster to Marlborough. As part of this project, the existing mileposts on I-290 will be replaced with ‘dual’ mile markers showing mileage for both I-395 and I-290.

Why do Route 128 mile markers not begin at zero in Peabody?

While I-95 is the primary designation for the highway between Canton and Peabody, Route 128 continues to be carried as a secondary designation on this road. This is why the mileposts for Route 128 begin in Canton and not Peabody. Although removing the Route 128 designation south of Peabody would allow the ‘zero’ milepost for 128 to be at I-95 in Peabody, such a change would require an outreach effort and changes to highway signs that is beyond the scope of the current exit renumbering project.

Why are Route 6’s new exits going from 1A, 1B to 55?

At the Sagamore Bridge, New Exits 1A and 1B are based on the Route 3 mileposts. Because MassDOT is not adopting the Exit 0 designation for exits, these exit numbers will stay the same. New Exits 55 and 82 are based on the Route 6 mileposts, which begin at the Rhode Island border in Seekonk and ascend from west to east to the end of Route 6 in Provincetown.

Why are exit numbers on Route 128 now increasing from Peabody to Gloucester (south to north)?

Previous exit numbers on Route 128 between Peabody and Gloucester, which date to when exit numbers were first added to the highway in the late 1950s, increased from north to south.  The updated exit numbers now increase from south to north, to be consistent with current practice for highway exit numbers. The new exit numbers on Route 128 are based on existing mile markers. The exit numbers for Route 128 begins at the junction with I-95 N, which occurs at mile post 37.6; therefore the new exit number for I-95 N has been designated as Exit 37.  Since the updated exit numbers now increase from south to north, the "A" and "B" exits at the Route 1A interchange (Exit 44, old exit 20) in Beverly have "swapped" positions.



October 18, 2020 - State Route 140 (COMPLETE)

October 25, 2020 - Interstate 195 (COMPLETE)

November 23, 2020 - State Route 25 (COMPLETE)

November 30, 2020 - State Route 3 (COMPLETE)

December 13, 2020 - US Route 6 (COMPLETE)

December 13, 2020 - Interstate 90 (COMPLETE)

January 3, 2021 - Interstate 295 (COMPLETE)

January 5, 2021 - Route 24 (COMPLETE)

January 20, 2021 - US Route 3 (COMPLETE)

February 11, 2021 - Route 128 (COMPLETE)

February 21, 2021 - Interstate 95 (COMPLETE)

February 28, 2021 - Interstate 84 (COMPLETE)

March 2, 2021 - Interstate 91 (COMPLETE)

March 21, 2021 - Route 146 (COMPLETE)

March 23, 2021 - Interstate 190 (COMPLETE)

March 28, 2021 - Route 2 (COMPLETE)

May 9, 2021 - Interstate 93 (COMPLETE)

May 16, 2021 - Interstate 495 (COMPLETE)

August 8, 2021 - Interstate 290 (COMPLETE)

August 8, 2021 - Interstate 395 (COMPLETE)

Online Meeting

Online Meeting Registration Page

September 24, 2020 – 6:30 PM, Public Information Meeting, Zoom

  • To access the presentation, please use this link
  • To access the recording of the meeting, please use this link

December 1, 2020 – 6:30 PM, Public Information Meeting, Zoom

  • To access the presentation, please use this link
  • Comment

    To ask a question and sign up for project updates, please click the comment form.

    To subscribe to project updates, please click here

    MassDOT Address

    Massachusetts Department of Transportation

    10 Park Plaza

    Suite 4160

    Boston, MA 02116

    Phone: (857) 368-4636

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