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Groton Exit 31 Off Rte. 495 Will Change To Mile-Based Designation

by Bob Katzen, BHR
     The Massachusetts Department of Transportation (MassDOT) announced it is taking steps to install federally-mandated mile- based exit signs on the state’s highways, including I-90, I-93, I-95, I-495 and Route 3. The Federal Highway Administration’s 2009 Manual on Uniform Traffic Control Devices mandated that all states establish this numbering system.
     The work will start in Western Massachusetts, move eastward, and is scheduled to be completed in spring 2021. The project’s estimated cost is $2.8 million, with 90 percent paid by the federal government and ten percent by the state
     “The conversion to mile-based exit numbers will benefit drivers by providing an obvious and straightforward calculation of driving distances,” said MassDOT Highway Administrator Jonathan Gulliver. “Massachusetts will complete installing the new signs in Spring 2021 and in the coming weeks and months we will have a comprehensive process to inform the public about the changes.
Even when the new exit signs are installed, the existing exit signs will remain in place to allow travelers the time to get accustomed to the changes.”
     Transportation officials noted that the changes will also help emergency responders determine the exact location of highway incidents more accurately.
     MassDOT said it will update all recreational and cultural interest signs to reflect the new system. Businesses that refer to existing exit numbers in their advertising, marketing and promotional materials will need to revise them accordingly.
There are public meetings being held on the changes. For more information and to see when a meeting is coming to your neighborhood, go to: https://
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