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massdot_highway_logoMassDOT has announced that the on-ramp which carries vehicles from Clarendon Street onto I-90 westbound in Boston will be permanently closed effective September 3, 2019. There will be no impacts to the I-90 mainline as a result of this on-ramp closure.

This closure is being implemented following approval from the Federal Highway Administration and due to concerns over safety and effective travel at this location. There are low traffic volumes at this location, as the on-ramp is utilized by approximately 75% less vehicles per hour than nearby on-ramps at Arlington Street and Dartmouth Street.

This on-ramp has limited sight distance for drivers, meaning they have little visibility of other vehicles when they are merging onto the highway, and it is too short for vehicles to accelerate to the appropriate speed at the access point. The crash rate at this on-ramp is also higher than the rates at other on-ramps in the local area.

“MassDOT’s first priority is safety and ensuring that members of the public safely reach their travel destinations,” said Highway Administrator Jonathan Gulliver. “We appreciate the cooperation and understanding of the traveling public and we advise motorists to utilize other nearby on-ramps onto I-90 westbound when this permanent closure is put in place.”

“Back Bay businesses support the elimination of this redundant on-ramp which will create a safer Clarendon Street for pedestrian, bicycle and vehicular traffic,” said Back Bay Association President Meg Mainzer-Cohen. “MassDOT is being innovative as they aim to enhance the safety of this midblock location for all roadway users.”

Members of the public should note that the Dartmouth Street and Arlington Street on-ramps onto I-90 westbound will remain open. These on-ramps are each located within approximately ½ mile of the Clarendon Street on-ramp.

MassDOT has had informal conversations with community leaders and municipal officials regarding the future closure of this on-ramp for more than one year. The department is currently carrying out a comprehensive outreach process in order to notify members of the public, motorists, residents, and businesses of this impact. A public meeting will be held on August 27 in Boston on this topic as follows:

Tuesday, August 27, 6pm, Central Library in Copley Square, 700 Boylston Street, Boston

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

  • Dial 511 and select a route to hear real–time conditions.
  • Visit, a website which provides real-time traffic and incident advisory information 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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