Interstate 90 - Exit 387 (Hartford)

Project Summary

This project will include reconstructing the standard diamond interchange at exit 387, and replacing the structure over Interstate 90.

The newly constructed corridor of Western Avenue will improve pedestrian facilities and traffic flow through the area.
In conjunction with the SDDOT project, the City of Hartford is continuing the Western Avenue reconstruction from the Diamond Trail intersection to the north of Mickelson Road.

Project Timeline:

Spring 2025 - November 2025 with minor finish work into 2026

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Project Updates:

Aug. 22, 2025:

July 15–Aug. 15, 2025, Completed work:

Crews completed all pile driving and set bridge girders for Phase One.
Work began on bridge decking and forming the abutments.
Ramp D was widened, graveled, and paved.
Dirt work began on Western Avenue, Ramp C, and the Frontage Road.

Anticipated work Aug. 15–Sept. 15, 2025:

Crews will continue bridge decking, pour the abutments, and may pour the bridge deck by mid-September.
On the west half of Western Avenue, crews will complete dirt work, storm sewer, paving, curb and gutter, mainline, and sidewalk.
Ramp C will be paved, after which crews will shift to Ramp A and tie into the City of Hartford project.

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April 8, 2025 - Press Release:

On Monday, April 14, 2025, construction work begins on Interstate 90 (exit 387) at Hartford. During the construction project, lane closures will be placed at various times on the eastbound and westbound lanes of I-90. Speed limits will be reduced to 65 mph through the work zone on I-90.

The project also includes work on Western Avenue from south of Jeffrey Street to Diamond Trail in Hartford. A two-way traffic configuration will be placed on Western Avenue.

This project will include reconstructing the standard diamond interchange at exit 387 and replacing the structure over I-90. Western Avenue will be reconstructed as a three-lane roadway with a center left-turn lane, curb and gutter, sidewalk, and a shared use path. Additionally, the City of Hartford will have a project starting that extends the reconstruction of Western Avenue from Diamond Trail to the north of Mickelson Road. Motorists are asked to stay alert for workers, equipment, and slowed traffic through the work zone.