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

4/16/2026

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.

4/10/2026

Weekly Construction Update - Friday, April 10, 2026

TRAFFIC IMPACT AND DURATION:From Monday, April 13, through Friday, April 17, between 6 AM and 3 PM, there will be a southbound lane closure along the west side of U.S. 2/7 from Whitcomb Street to Mountain View Drive. In addition, there will be an intermittent northbound lane closure along the east side of U.S. 2/7 between South Park Drive and the Interstate 89 (I-89) southbound on-ramp and along the I-89 northbound off-ramp.

CONSTRUCTION ACTIVITIES:Crews will continue to work on roadway widening and the installation of light pole foundations and conduit along the west side of U.S. 2/7 between Whitcomb Street and the I-89 southbound off-ramp and the I-89 northbound on-ramp and Mountain View Drive. Crews will continue installing overhead sign foundations along the east side of U.S. 2/7 between South Park Drive and I-89 southbound on-ramp and along the I-89 northbound off-ramp. In addition, temporary traffic signals will be installed at the intersection of U.S. 2/7 at South Park Drive/Highpoint Center.

4/3/2026

Weekly Construction Update - Friday, April 3, 2026

TRAFFIC IMPACT AND DURATION: From Monday, April 6, through Friday, April 10, between 6 AM and 3 PM, the following traffic impacts will be in effect:

single lane closure along the west side of U.S. Route 2/7 (U.S. 2/7) from Whitcomb Street to Mountain View Drive,
intermittent single lane closure along the east side of U.S. 2/7 from South Park Drive and the Interstate 89 (I-89) southbound on-ramp,
intermittent lane width reductions and potential intermittent lane closures along the I-89 northbound off-ramp and the I-89 southbound off-ramp,
an instance of a single lane closure with traffic shifts on Mountain View Drive near the interstate.

CONSTRUCTION ACTIVITIES: Next week, crews will continue working along the west side of U.S. 2/7 between Whitcomb Street and Mountain View Drive installing light pole bases, widening the roadway and constructing the slip lanes for the I-89 southbound off-ramp and the I-89 northbound on-ramp. Crews will be installing overhead sign foundations and light pole bases along U.S. 2/7 between South Park Drive and the I-89 southbound on-ramp, the I-89 southbound off-ramp and I-89 northbound off-ramp, and Mountain View Drive near the interstate.

4/3/2026