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, March 13, 2026

DATE: Friday, March 13, 2026

TRAFFIC IMPACT AND DURATION: From Monday, March 16, through Friday, March 20, between 6 AM and 3 PM, lane closures and lane shifts will be in place at the following locations: 

  • on the west side of U.S. Route 2/7 (U.S. 2/7) in front of Whitcomb Street, 
  • on the north side of Upper Mountain View Drive near its intersection with U.S. 2/7, 
  • on the west side of U.S. 2/7 between Mountain View Drive and the Park & Ride, and, 
  • on the south side of Rathe Road near its intersection with U.S. 2/7. 

In addition, the lane width of the Interstate 89 (I-89) Exit 16 northbound off‑ramp will be reduced, with traffic maintained.  

Independent utility companies will periodically conduct work along U.S. 2/7 between the Winooski town line and Sunderland Woods Road, under lane closures.

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: Next week, crews may conduct hammering on U.S. 2/7 in front of Whitcomb Street to remove ledge, with additional hammering planned on the north side of Upper Mountain View Drive near its intersection with U.S. 2/7. Work will continue behind barriers along the I 89 Exit 16 northbound off ramp near The Lighthouse Restaurant to build the roadway subbase. Excavation for signal work will take place throughout the week at the U.S. 2/7 and Mountain View Drive intersection, with the potential for excavation to extend to other intersections, such as U.S. 2/7 and Hercules Drive, depending on work progress. Crews will also perform stormwater channel work along the west side of U.S. 2/7 between Mountain View Drive and the Park & Ride and on the south side of Rathe Road near its intersection with U.S. 2/7.

Independent utility work will continue periodically along U.S. 2/7 between the Winooski town line and Sunderland Woods Road.

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Weekly Construction Update - Friday, March 6, 2026

DATE: Friday, March 6, 2026

TRAFFIC IMPACT AND DURATION: From Monday, March 9, through Friday, March 13, between 6 AM and 3 PM, lane closures and lane shifts will be in effect on U.S. Routes 2/7 (U.S. 2/7) between the Interstate 89 (I-89) Exit 16 northbound off-ramp and Hercules Drive.

Independent utility companies will periodically conduct work along U.S. 2/7 between the Winooski town line and Sunderland Woods Road, under lane closures.

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 widen the roadway on U.S. 2/7 between the I‑89 Exit 16 northbound off‑ramp and Mountain View Drive next week. They will also remove rock and install new drainage on U.S. 2/7 between Mountain View Drive and Hercules Drive. No blasting activities are scheduled for next week.

Independent utility work will continue periodically along U.S. 2/7 between the Winooski town line and Sunderland Woods Road.

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Weekly Construction Update - Friday, February 27, 2026

DATE: Friday, February 27, 2026

TRAFFIC IMPACT AND DURATION: From Monday, March 2, through Friday, March 6, between 6 AM and 3 PM, lane closures and lane shifts will be in effect:

  • on the east side of U.S. Routes 2/7 (U.S. 2/7) between South Park Drive and the I-89 northbound off-ramp,
  • on the west side of U.S. 2/7 between Hercules Drive and Rathe Road, and,
  • on Rathe Road near its intersection with U.S. 2/7.

In addition, daytime blasting will require traffic stoppages for approximately 10 minutes in the following locations:

  • U.S. 2/7 between Hercules Drive and Rathe Road,
  • Rathe Road near U.S. 2/7, and,
  • nearby intersecting side roads.

One blasting event is expected each day, with the possibility of up to two. To learn more about traffic impacts related to blasting activities, click here.

Independent utility companies will periodically conduct work along U.S. 2/7 between the Winooski town line and Sunderland Woods Road, under lane closures.

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 begin drilling to remove ledge along U.S. 2/7 between South Park Drive and the Interstate 89 (I-89) Exit 16 southbound on‑ramp. Crews will also remove the existing barrier around the I‑89 bridge pier on the east side of U.S. 2/7.

Drainage work will continue along U.S. 2/7 between Hercules Drive and Rathe Road.

Beginning Monday, crews will resume blasting activities, starting on U.S. 2/7 between Hercules Drive and Rathe Road while drilling occurs on Rathe Road near U.S. 7. For the remainder of the week, drilling and blasting are expected to take place primarily on Rathe Road near U.S. 7.

Independent utility work will continue periodically along U.S. 2/7 between the Winooski town line and Sunderland Woods Road.

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Weekly Construction Update - Friday, February 20, 2026

DATE: Friday, February 20, 2026

SPECIAL ANNOUNCEMENT: Starting March 2, 2026, intermittent daytime blasting will take place on U.S. Routes 2/7 (U.S. 2/7) between Hercules Drive and Rathe Road and on Rathe Road near its intersection with U.S. 2/7.  

This schedule is subject to change; more details will be shared next week. For drilling and blasting FAQs, click here 

TRAFFIC IMPACT AND DURATION: From Monday, February 23, through Friday, February 27, between 6 AM and 3 PM, lane closures and lane shifts will be in effect: 

  • on the west side of U.S. 2/7 between Hercules Drive and Rathe Road, 
  • on the west side of U.S. 2/7 below the Interstate 89 (I-89) bridge at Exit 16,  
  • on Rathe Road near its intersection with U.S. 2/7, 
  • on the south side of Upper Mountain View Drive near the CVS Pharmacy.  

A possible lane width reduction may occur on the I-89 Exit 16 southbound on-ramp, with traffic maintained.  

Independent utility companies will periodically conduct work along U.S. 2/7 between the Winooski town line and Sunderland Woods Road, under lane closures. 

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: Early next week, crews plan to finish hammering, ditching, and grass channel work on the south side of Upper Mountain View Drive near the CVS Pharmacy. Work will continue on the west side of U.S. 2/7 between Hercules Drive and Rathe Road, including hammering and ditching. On Thursday and Friday, drilling is scheduled to begin on U.S. 2/7 between Hercules Drive and Rathe Road and at the Rathe Road and U.S. 2/7 intersection. Crews will also demolish and remove existing barriers along the west side of U.S. 2/7 beneath the I‑89 bridges at Exit 16, and complete clearing work near the I‑89 Exit 16 southbound on‑ramp and the southbound interstate bridge. 

Independent utility work will continue periodically along U.S. 2/7 between the Winooski town line and Sunderland Woods Road. 

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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