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MassDOT Advisory:


Statewide Exit Renumbering Work Complete


BOSTON – The Massachusetts Department of Transportation (MassDOT) is announcing it has completed converting all exit numbers on freeways to a milepost-based numbering system, per Federal Highway Administration (FHWA) requirements. Freeways in Massachusetts previously utilized a sequential exit numbering method.


MassDOT began this project on October 18, 2020, on Route 140 between Taunton and Freetown. MassDOT finished the Statewide Exit Renumbering Project on August 19, 2021, by completing the final corridor on I-395 between Auburn and Webster.


“I would like to thank the traveling public for their patience and understanding during this project,” said MassDOT Highway Administrator Jonathan Gulliver.  “The completion of the conversion to mile-based exit numbers brings us into federal compliance and provides important information, like precise locations and an easily understandable calculation of driving distances, to First Responders and all other users of the roadway.”


The following corridors now have milepost-based exits:

  • Interstate 84
  • Interstate 90
  • Interstate 91
  • Interstate 93
  • Interstate 95
  • Interstate 190
  • Interstate 195
  • Interstate 290
  • Interstate 295
  • Interstate 395
  • Interstate 495
  • Route 2
  • Route 3
  • Route 6
  • Route 24
  • Route 25
  • Route 128
  • Route 140
  • Route 146
  • US Route 3

Please note that “Old Exit” signs have been installed at the one-mile advance sign and gore signs. These signs will be up for a minimum of two years to help with the transition. The project team has provided mapping services with information on the new exit numbers for all of the corridors. The timing of the exit number updates may vary by platform as they will be completed on their own individual schedules. For a full list of corridors, and their old and new exit numbers, please visit the project website at


For more information on the project, or to submit a comment or question, please visit the project’s website. If needed, a GIS shapefile with the specific numbering information is available on Massachusetts’ GeoDOT site.


For more information on traffic conditions, travelers are encouraged to:


  • Dial 511 before heading out onto the roadways and select a route to hear real-time conditions.
  • Visit, a website that provides real-time traffic and incident advisory information, access to traffic cameras, and allows users to subscribe to text and email alerts for traffic conditions.
  • Follow MassDOT on Twitter @MassDOT to receive regular updates on road and traffic conditions.
  • Download MassDOT’s GoTime mobile app and view real-time traffic conditions before setting out on the road.




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