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:

Oct. 27, 2025:

Sept. 15, 2025 – Oct. 15, 2025, Completed Work:
Contractors have completed Phase 1 of construction and begun Phase 2. Two lanes of traffic are now open on the new pavement, and traffic is using the new permanent eastbound off-ramp and westbound on-ramp.

Anticipated Work Oct. 15, 2025 – Nov. 15, 2025:
Contractors will begin grading, pipe work, gravel surfacing, and concrete paving on the westbound off-ramp and the remaining third lane of Western Avenue. The existing bridge over Interstate 90 will be demolished, and bridge construction on the other half of the new structure will continue through fall and winter. The prime contractor plans to continue work throughout the fall, weather permitting.

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Oct. 15, 2025:

Beginning on Thursday, Oct. 16, 2025, traffic will be shifted onto the new pavement and bridge on Western Avenue over Interstate 90 at exit 387 (Hartford), marking the completion of phase one of construction. Two lanes of traffic will remain open on the new pavement on Western Avenue with a 10-foot width restriction in place. A temporary westbound off-ramp will be utilized during construction of the permanent off-ramp.

Phase two construction will begin immediately and will include building the second half of the bridge and Western Avenue. Work will continue through the fall and winter as weather allows.

In addition, overnight closures are scheduled to take place on I-90 for bridge removal work:

From 8 p.m. Friday, Oct. 17, 2025, to 6 a.m. Saturday, Oct. 18, 2025, eastbound I-90 traffic will be diverted around the closure via the on-ramp and off-ramp at exit 387.
From 8 p.m. Saturday, Oct. 18, 2025, to 6 a.m. Sunday, Oct. 19, 2025, traffic will be in a two-way configuration, and the westbound off-ramp will be closed. Traffic will be advised to use the westbound off-ramp at exit 390.

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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.