Vermont’s First Diverging Diamond Interchange

The Vermont Agency of Transportation (VTrans) is improving the roadway along the U.S. Routes 2/7 (U.S. 2/7) corridor, in the vicinity of Interstate 89 (I-89) Exit 16, to enhance mobility and safety in Colchester, Vermont. The project area extends from the Colchester-Winooski town line north for approximately 1 mile to just beyond the intersection of Sunderland Woods Road at U.S. 2/7. The core of the project is to reconfigure the existing tight diamond interchange to a Diverging Diamond Interchange at I-89 Exit 16.

Learn more about this and other improvements

Image of Interchange

Project Updates

Weekly Construction Update - Friday, May 8, 2026

TRAFFIC IMPACT AND DURATION: Nightly, starting the evening of Sunday, May 10, through the morning of Saturday, May 16, between 7 p.m. and 6 a.m.:

  • Lane closures along the west side of U.S. Route 2/7 (U.S. 2/7) between South Park Drive and Mountain View Drive, with two-way traffic shifted to the east

Intermittent traffic impacts starting the morning of Monday, May 11, through Friday, May 15, between 9 a.m. and 3 p.m.:

  • Intermittent lane closures along either side of U.S. 2/7 at its signalized intersections with South Park Drive, the interstate ramps, Lower Mountain View Drive/Mountain View Drive, Hercules Drive, and Rathe Road. Closures may take place at multiple locations along the corridor; temporary traffic control will be coordinated.

CONSTRUCTION ACTIVITIES: Nighttime work this week will take place between 7 p.m. and 6 a.m., starting the evening of Sunday, May 10, through the morning of Saturday, May 16. Starting Sunday and continuing through Thursday night, crews will remove asphalt and boxcut along the west side of U.S. 2/7, starting near South Park Drive and continuing north to Mountain View Drive. On Friday night, crews will temporarily pave the gravel section of U.S. 2/7 and install temporary line markings. Daytime work will take place between 6 a.m. and 3 p.m., starting the morning of Monday, May 11, through the afternoon of Friday, May 15. Crews will work to maintain gravel surfaces along the west side of U.S. 2/7 throughout the week. Crews will continue installing mast arm foundations at the signalized intersections of U.S. 2/7 at South Park Drive, the interstate ramps, Lower Mountain View Drive/Mountain View Drive, Hercules Drive, and Rathe Road.

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Weekly Construction Update - Friday, May 1, 2026

TRAFFIC IMPACT AND DURATION: Starting the evening of Sunday, May 3, through the morning of Friday, May 8, between 7 p.m. and 6 a.m.:

  • Lane closures along the west side of U.S. Route 2/7 (U.S. 2/7) between South Park Drive and Mountain View Drive with two-way traffic shifted to the east
  • Lane closures along Lower Mountain View Drive with intermittent traffic shifts or flagged one-way alternating traffic

Intermittent traffic impacts starting the morning of Monday, May 4, through Friday, May 8, between 9 a.m. and 3 p.m.:

  • Lane closures along the west side of U.S. 2/7 between South Park Drive and Mountain View Drive with two-way traffic shifted to the east
  • Lane closures or width reductions along the Interstate 89 (I-89) Southbound Off-Ramp

Please be advised that portions of U.S. 2/7 will be reduced to a gravel surface starting Sunday night through Friday afternoon. Motorists should slow down, use caution, and follow traffic control personnel instructions and signage. In addition, motorists should expect significant delays when traveling through the work zone and along adjacent roadways. Please plan ahead and consider alternative routes.

CONSTRUCTION ACTIVITIES: Nighttime work this week will take place between the hours of 7 p.m. and 6 a.m., starting the evening of Sunday, May 3, through the morning of Friday, May 8. On Sunday and Monday nights, crews will remove the asphalt from the west side of U.S. 2/7 between South Park Drive and Mountain View Drive in preparation for boxcutting starting Tuesday evening and continuing throughout the week. The west side of U.S. 2/7 will have uneven, gravel conditions throughout the week until Friday afternoon. In addition, crews will work to widen Lower Mountain View Drive. Daytime work this week will take place between 6 a.m. and 3 p.m., starting the morning of Monday, May 4, through the afternoon of Friday, May 8. Crews will work to maintain gravel surfaces along the west side of U.S. 2/7 throughout the week. There is the potential for crews to continue foundation work along the I-89 southbound off ramp. On Friday, crews will temporarily pave the gravel section of U.S. 2/7 and install temporary line striping.

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Weekly Construction Update - Friday, April 24, 2026

TRAFFIC IMPACT AND DURATION: Intermittent traffic impacts starting the evening of Sunday, April 26, through the morning of Friday, May 1, between 7 p.m. and 6 a.m.:

  • Lane and shoulder closures along Lower Mountain View Drive
  • Lane closures along U.S. 2/7 between South Park Drive and Mountain View Drive

Intermittent traffic impacts starting the morning of Monday, April 27, through the evening of Friday, May 1, between 9 a.m. and 3 p.m.:

  • Southbound lane closure along the west side of U.S. 2/7 from Whitcomb Street to Mountain View Drive
  • Northbound lane closure along the east side of U.S. 2/7 from South Park Drive to Mountain View Drive

Motorists should expect significant delays when traveling through the work zone and along adjacent roadways. Please plan ahead, consider alternative routes, or use other forms of transportation (carpooling, ridesharing, transit, biking, or walking). Drivers should slow down, use caution, and follow flaggers and signage. 

CONSTRUCTION ACTIVITIES: Work this week will take place at night between the hours of 7 p.m. and 6 a.m., starting the evening of Sunday, April 26, through the morning of Friday, May 1. Crews will work along the north side of Lower Mountain View Drive, installing drainage, regrading, and continue working on the southeast corner with U.S. 2/7. Crews will adjust structures along U.S. 2/7 between South Park Drive and Mountain View Road in preparation for the removal of asphalt and subbase. Work this week will take place during the daytime between 6 a.m. and 3 p.m., starting the morning of Monday, April 27, through the afternoon of Friday, May 1. Crews will set light pole bases, demolish the remaining existing traffic signal infrastructure, and install foundations for the new signals along U.S. 2/7 between South Park Drive and Mountain View Drive.

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Weekly Construction Update - Thursday, April 16, 2026

SPECIAL NOTICE: Tomorrow, Friday, April 17, crews will install temporary traffic signals at the intersection of U.S. Route 2/7 (U.S. 2/7) at Hercules Drive. Potential for lane closures. Flaggers will be present to assist traffic through the intersection.

TRAFFIC IMPACT AND DURATION: Intermittent traffic impacts starting Monday, April 20, continuing through Friday, April 24, between 6 AM and 3 PM:

  • Southbound lane closure along the west side of U.S. 2/7 from Whitcomb Street to Mountain View Drive
  • Northbound lane closure along the east side of U.S. 2/7 from South Park Drive to Mountain View Drive
  • Width reductions along Interstate 89 (I-89) northbound on-ramp and off-ramp
  • There is the potential for width reductions along I-89 southbound off-ramp

Motorists should expect significant delays when traveling through the work zone and along adjacent roadways. Please plan ahead, consider alternative routes, or use other forms of transportation (carpooling, ridesharing, transit, biking, or walking). Drivers should slow down, use caution, and follow flaggers and signage.

CONSTRUCTION ACTIVITIES:Crews will continue to work on roadway widening and the installation of light pole foundations and conduit and interconnect cables for the future traffic signals along U.S. 2/7, the I-89 northbound on and off-ramps and I-89 southbound off-ramp. Crews will continue installing temporary traffic signals at intersections along U.S. 2/7 working north throughout the project limits. Once temporary traffic signals have been installed, crews will demolish and remove the existing signals before beginning to install new traffic signal infrastructure starting at Mountain View Drive.

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Driving Animations

Experience Exit 16 DDI

Driving simulation traveling on US 2 West / 7 North through the DDI

Aerial view of the operating diverging diamond interchange at I-89 Exit 16

Driving simulation exiting I-89 onto US 2 East/7 South via Exit 16

Driving simulation traveling on US 2 East/7 South through the DDI

Driving simulation exiting I-89 onto US 2 West / 7 North via Exit 16