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, June 5, 2026

TRAFFIC ALERT: This evening, Friday, June 5, starting at 7 p.m., continuing through Saturday morning, June 6, at 6 a.m., the Interstate 89 (I-89) Exit 16 southbound on-ramp will be fully closed. Motorists seeking to travel southbound on I-89 should use the Exit 15 southbound on-ramp in Winooski or seek alternative routes. For more information about construction activities and impacts taking place today, Friday, June 5, read last week’s Construction Update here.

Nightly, starting the evening of Sunday, June 7, through the morning of Saturday, June 13, between 7 p.m. and 6 a.m., unless otherwise noted:

  • Lane closures along the east side of U.S. Route 2/7 (U.S. 2/7), the northbound lanes, between the I-89 southbound ramps and Mountain View Drive, with two-way traffic maintained through traffic shifts onto the west side of U.S. 2/7.
  • Intermittent lane closures with traffic shifts at the intersections of U.S. 2/7 and Hercules Drive and U.S. 2/7 and Rathe Road, with two-way traffic maintained.
  • From Thursday, June 11, at 7 p.m. through Friday, June 12, at 6 a.m., U.S. 2/7 between South Park Drive and the I-89 southbound ramps will be under lane closures with traffic shifted to the other side. Two-way traffic will be maintained.

Daily, starting the morning of Monday, June 8, through the afternoon of Friday, June 12, between 9 a.m. and 3 p.m. unless otherwise noted:

  • Single-lane closure on either side of U.S. 2/7 between South Park Drive and the I-89 southbound ramps, with two-way traffic maintained.
  • Intermittent lane closures with traffic shifts at the intersections of U.S. 2/7 and Hercules Drive and U.S. 2/7 and Rathe Road, with two-way traffic maintained.

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

CONSTRUCTION ACTIVITIES: Nighttime work this week will take place between 7 p.m. and 6 a.m., starting the evening of Sunday, June 7, through the morning of Saturday, June 13. Throughout the week, crews will continue to remove asphalt and boxcut along the east side of U.S. 2/7 (northbound) between the I-89 southbound ramps and Mountain View Drive, starting where they left off near the I-89 overpass bridges and working north toward Mountain View Drive. This work will reduce a section of U.S. 2/7 to gravel. On Thursday night, crews will pave the second lift along the east side of U.S. 2/7 (northbound) between South Park Drive and the I-89 overpass bridges. On Friday night, crews will temporarily pave the gravel section of U.S. 2/7 and install temporary line markings. Throughout the week, crews will install conduit sleeves for the new traffic signals at the intersections of U.S. 2/7 and Hercules Drive and U.S. 2/7 and Rathe Road.

Daytime work will take place between 7 a.m. and 3 p.m., starting the morning of Monday, June 8, through the afternoon of Friday, June 12. Crews will continue sidewalk preparation along either side of U.S. 2/7 and continue to install the cable connections between the new traffic signals (interconnect) along the west side of U.S. 2/7 between South Park Drive and the I-89 southbound ramps. Crews will install foundations for the new traffic signal infrastructure at the intersections of U.S. 2/7 and Hercules Drive and U.S. 2/7 and Rathe Road.

Read more

Weekly Construction Update - Friday, May 29, 2026

TRAFFIC IMPACT AND DURATION: Nightly, starting the evening of Sunday, May 31, through the morning of Saturday, June 6, between 7 p.m. and 6 a.m. unless otherwise noted:

  • Lane closures along the east side of U.S. Route 2/7 (U.S. 2/7), the northbound lanes, between the Interstate 89 (I-89) southbound ramps and the I-89 northbound ramps, with two-way traffic maintained through traffic shifts onto the west side of U.S. 2/7.
  • There is the potential for intermittent width reductions along the I-89 Exit 16 southbound on-ramp. On Friday, June 5, starting at 7 p.m. through Saturday morning, June 6, at 6 a.m., the I-89 Exit 16 southbound on-ramp will be fully closed. Motorists seeking to travel southbound on I-89 should use Exit 15 or seek alternative routes.

Daily, starting the morning of Monday, June 1, through the afternoon of Friday, June 5, between 9 a.m. and 3 p.m. unless otherwise noted:

  • Single-lane closure on either side of U.S. 2/7 between South Park Drive and the I-89 southbound ramps, with two-way traffic maintained.

Please be advised that portions of U.S. 2/7 and the I-89 Exit 16 southbound on-ramp will be reduced to a gravel surface starting Sunday night through Saturday morning. Motorists should slow down, use caution, and follow traffic control personnel's instructions and signage. In addition, motorists should expect significant delays when traveling through the work zone and along adjacent roadways. Please plan additional travel time or consider alternative routes.

CONSTRUCTION ACTIVITIES: Nighttime work this week will take place between 7 p.m. and 6 a.m., starting the evening of Sunday, May 31, through the morning of Saturday, June 6. Crews will continue to remove asphalt and boxcut along the east side of U.S. 2/7 (northbound), starting near the I-89 southbound ramps working north toward the I-89 northbound ramps. This work will reduce a section of U.S. 2/7 to gravel. Boxcutting and widening will also take place along the I-89 Exit 16 southbound on-ramp. On Friday night, crews will temporarily pave the gravel section of U.S. 2/7 and the I-89 southbound on-ramp and install temporary line markings.

Daytime work will take place between 7 a.m. and 3 p.m., starting the morning of Monday, June 1, through the afternoon of Friday, June 5. Crews will continue sidewalk preparation and installing light pole bases along either side of U.S. 2/7 between South Park Drive and the I-89 southbound ramps. Additionally, crews will continue to install the cable connections between the new traffic signals (interconnect) along the west side of U.S. 2/7 between South Park Drive and the I-89 southbound ramps.

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Weekly Construction Update - Friday, May 22, 2026

TRAFFIC IMPACT AND DURATION: Crews will be off-site by noon TODAY, Friday, May 22, in observance of Memorial Day. Crews will return on Tuesday, May 26 at 7 a.m.

Nightly, starting the evening of Tuesday, May 26, through the morning of Saturday, May 30, between 7 p.m. and 6 a.m. unless otherwise noted:

  • Lane closures along one side of U.S. Route 2/7 (U.S. 2/7) between the Interstate 89 (I-89) southbound ramps and the I-89 northbound ramps, with two-way traffic shifted to the opposite side of the roadway.

Daily, starting the morning of Tuesday, May 26, through the afternoon of Friday, May 29, between 9 a.m. and 3 p.m. unless otherwise noted:

  • Single-lane closure on either side of U.S. 2/7 between South Park Drive and the I-89 southbound ramps, with two-way traffic maintained.

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

CONSTRUCTION ACTIVITIES: Nighttime work this week will take place between 7 p.m. and 6 a.m., starting the evening of Tuesday, May 26, through the morning of Saturday, May 30. Crews will continue to remove asphalt and boxcut along U.S. 2/7, starting near the I-89 southbound ramps working north toward the I-89 northbound ramps. This work will reduce a section of U.S. 2/7 to gravel. On Friday night, crews will temporarily pave the gravel section and install temporary line markings.

Daytime work will take place between 7 a.m. and 3 p.m., starting the morning of Tuesday, May 26, through the afternoon of Friday, May 29. Crews will install traffic signal infrastructure at the intersections of U.S. 2/7 at South Park Drive and the I-89 southbound ramps. Additionally, crews will conduct sidewalk grading along U.S. 2/7 between South Park Drive and the I-89 southbound ramps, and work to maintain gravel surfaces along U.S. 2/7 throughout the week.

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Traffic Alert - I-89 SB Off-Ramp Overnight Closure 5/21 at 7PM - 5/22 at 6 AM

Interstate 89 Exit 16 Southbound Off-Ramp Closed Overnight from Thursday, May 21, at 7 PM through Friday, May 22 at 6 AM

DATE ISSUED: Wednesday, May 20, 2026

COLCHESTER, VT: Starting tomorrow, Thursday, May 21, at 7 PM, the Interstate 89 (I-89) Exit 16 southbound off-ramp will be closed overnight for ramp reconstruction. The I-89 Exit 16 southbound off-ramp will be reopened by 6 AM on Friday, May 22.

During the closure, I-89 southbound traffic seeking to exit the interstate at Exit 16 will be directed to exit at Exit 17 in Colchester, then routed east on U.S. 2 and south on U.S. 2/7 at the Chimney Corner intersection. Signage and message boards will be posted near Exit 16 and along the detour route to guide motorists.

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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