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, November 14, 2025

DATE: Friday, November 14, 2025

SPECIAL ANNOUNCEMENT: The Interstate 89 Exit 16 southbound on-ramp is tentatively scheduled to be closed overnight from 10 PM on Sunday, November 23, through 6 AM on Monday, November 24, for drainage work, with traffic maintained via a signed detour route via Exit 15. More details regarding this overnight ramp closure will be issued in upcoming Construction Updates and a supplemental Traffic Alert.

TRAFFIC IMPACT AND DURATION: From Monday, November 17, through Friday, November 21, between 6 AM and 3 PM, U.S. Route 2/7 (U.S. 2/7) will have lane closures along U.S. 2/7 near Whitcomb Street (Champlain Farms) and Rathe Road (the Park and Ride) for drainage work.

In addition, independent utility companies are on-site conducting independent utility work along U.S. 2/7 throughout the project limits, under lane closures.

Motorists should expect significant delays when traveling through the work zone and along adjacent roadways. Please plan ahead, leaving plenty of additional time to get to and from your destination. Whenever possible, consider alternate routes or other forms of transportation such as carpooling, ridesharing, transit, biking, or walking. Drivers should slow down, use caution, and follow flaggers and road signs.

CONSTRUCTION ACTIVITIES: Crews will continue work on the stormwater ponds near the I-89 southbound on-ramp and on the east side of U.S. 2/7 north of Hercules Drive. This work will take place off the roadway. Additional drainage work will take place along U.S. 2/7 near Whitcomb Street and Champlain Farms and near Rathe Road and the Park and Ride. This work will require lane closures along U.S. 2/7. East Coast Signals will be on-site installing temporary traffic signals at the intersection of U.S. 2/7 and Mountain View Drive/Lower Mountain View Drive. This work will take place off the roadway. No blasting activities are anticipated to take place next week, with blasting activities anticipated to resume the week of December 1.

Independent utility work will take place along U.S. 2/7 throughout the project limits under lane closures.

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Weekly Construction Update - Friday, November 7, 2025

DATE: Friday, November 7, 2025

TRAFFIC IMPACT AND DURATION: On Sunday, November 9, between 7 PM and 6 AM, U.S. Route 2/7 (U.S. 2/7) northbound will be reduced to a single lane near the Interstate 89 (I-89) southbound on-ramp. From Monday, November 10, through Friday, November 14, between 6 AM and 3 PM, crews will be working throughout the project limits under shoulder closures along the east side of U.S. 2/7 between Hercules Drive and Champlain Drive (Monday only), northbound and southbound shoulder and lane closures along U.S. 2/7 just south of Rathe Road, and shoulder closures along the I-89 southbound on-ramp. In addition, intermittent blasting events will require U.S. 2/7 between South Park Drive and Mountain View Drive and all intersecting sideroads and interstate ramps to be shut down for approximately 10 minutes. To learn more about traffic impacts associated with blasting activities, click here.

Motorists should expect significant delays when traveling through the work zone and along adjacent roadways. Please plan ahead, leaving plenty of additional time to get to and from your destination. Whenever possible, consider alternate routes or other forms of transportation such as carpooling, ridesharing, transit, biking, or walking. Drivers should slow down, use caution, and follow flaggers and road signs.

CONSTRUCTION ACTIVITIES: Sunday night and Tuesday through Friday during the daytime hours, crews will continue drainage work near the I-89 southbound on-ramp. Monday during the daytime hours, crews will continue working on the drainage pond north of Hercules Drive and conduct testing for ledge along Mountain View Drive. Monday through Friday during the daytime hours, crews will conduct testing for ledge along both sides of U.S. 2/7 just south of Rathe Road and start drainage work in the parking lot of The Lighthouse Restaurant. In addition, intermittent daytime blast events will take place throughout the week on the west side of U.S. 2/7 between the I-89 northbound on-ramp and Mountain View Drive, near the CVS Pharmacy.

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Weekly Construction Update - Friday, October 31, 2025

DATE: Friday, October 31, 2025

SPECIAL ANNOUNCEMENT: The Interstate 89 Exit 16 southbound on-ramp is scheduled to be closed overnight from 10 PM on Sunday, November 16, through 6 AM on Monday, November 17, for drainage work, with traffic maintained via a signed detour route. More details regarding this overnight ramp closure will be issued in upcoming Construction Updates and supplemental Traffic Alerts.

TRAFFIC IMPACT AND DURATION: From Monday, November 3, through Friday, November 7, between 6 AM and 3 PM, U.S. 2/7 will have a lane closure along the east side of the roadway between South Park Drive and the I-89 southbound on-ramp for drainage work, and along the west side of the roadway between the I-89 northbound on-ramp and Mountain View Drive for blasting. There is potential for a lane reduction on South Park Drive at its intersection with U.S. 2/7, and width reduction on the I-89 southbound on-ramp. For each blasting event, U.S. 2/7 between South Park Drive and Mountain View Drive and all intersecting sideroads will be shut down for approximately 10 minutes, and temporary traffic holds (rolling roadblocks) will occur on the I-89 Exit 16 interchange ramps. To learn more about traffic impacts associated with blasting activities, click here

Motorists should expect significant delays when traveling through the work zone and along adjacent roadways. Please plan ahead, leaving plenty of additional time to get to and from your destination. Whenever possible, consider alternate routes or other forms of transportation such as carpooling, ridesharing, transit, biking, or walking. Drivers should slow down, use caution, and follow flaggers and road signs.

CONSTRUCTION ACTIVITIES: Next week, crews will continue drainage work on the east side of U.S. 2/7 between the I-89 southbound on-ramp and South Park Drive, including along the southbound on-ramp and South Park Drive. Blasting events will continue to take place on the west side of U.S. 2/7 between the I-89 northbound on-ramp and Mountain View Drive, near the CVS Pharmacy.

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Weekly Construction Update - Friday, October 24, 2025

DATE: Friday, October 24, 2025

TRAFFIC IMPACT AND DURATION: From Monday, October 27, through Friday, October 31, between 6 AM and 3 PM, U.S. 2/7 will have a lane closure along the east side of the roadway between South Park Drive and the I-89 southbound on-ramp (near the Shell Gas Station) and just north of Hercules Drive (near Lucky’s Trailer Supplies) for drainage work. Throughout the week, U.S. 2/7 will have a lane closure along the west side of the roadway between the I-89 northbound on-ramp and Mountain View Drive, U.S. 2/7 between South Park Drive and Mountain View Drive and all intersecting sideroads will be shut down for approximately 10 minutes, and rolling roadblocks will be initiated on I-89 between Exits 14 and 17 for each blasting event. To learn more about traffic impacts associated with blasting activities, click here.

Motorists should expect significant delays when traveling through the work zone and along adjacent roadways. Please plan ahead, leaving plenty of additional time to get to and from your destination. Whenever possible, consider alternate routes or other forms of transportation such as carpooling, ridesharing, transit, biking, or walking. Drivers should slow down, use caution, and follow flaggers and road signs.

CONSTRUCTION ACTIVITIES: Next week, crews will continue drainage work for the dry ponds being constructed on the east side of U.S. 2/7 near the I-89 southbound on-ramp and on U.S. 2/7 just north of Hercules Drive. Blasting events will continue to take place along U.S. 2/7 between Mountain View Drive and the I-89 northbound on-ramp, near the CVS Pharmacy.

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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