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

Special Notice 12/4/2023


DATE: Monday, December 4, 2023

Single-Lane Closure along U.S. 2/7 just north of Lower Mountain View Drive for Independent Utility Work in Colchester, VT

TOMORROW, Tuesday, December 5, during daytime hours, Vermont Gas Systems (VGS) will be conducting independent utility work along U.S. Route 2/7 (U.S. 2/7) just north of Lower Mountain View Drive. This work will take place under the closure of the outermost northbound lane along U.S. 2/7 in the vicinity of Lower Mountain View Drive. This work will take place between the hours of 6:00 a.m. and 4:00 p.mMotorists are reminded to please use caution, be alert, and drive slowly when traveling through the work zone.

Read more

End of Season Survey

DATE: Friday, December 1, 2023

The Exit 16 DDI Project has Completed the First Phase of Construction!

VTrans wants to hear from you!

The Vermont Agency of Transportation (VTrans) announces the completion of the first phase of construction for the Exit 16 DDI Project. The first phase of construction focused on the removal of ledge, relocation of utilities, installation of drainage infrastructure, and construction of retaining walls. The first construction season required around-the-clock construction as crews restricted blasting activities to daytime hours and significant traffic impacts to nighttime hours. The second phase of construction will focus on the bulk of the roadway work, including the construction of the new interchange.

VTrans is seeking your feedback on construction impacts and project outreach to help us facilitate better communication and satisfaction throughout the remainder of construction.

Please take five minutes to complete a short survey to share your experiences during the first phase of construction. Please click here to access the survey. The survey will close in two weeks, on Friday, December 15, 2023.

Thank you to everyone who has already completed the survey.

The survey is anonymous, and questions asked in the comments section will not receive a response. If you have a question and would like a response, please email

We appreciate your feedback! 

Read more

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