A significant stretch of Interstate 90 near the Wyoming-Montana state line is entering its second construction season, with the Wyoming Department of Transportation and contractor Croell, Inc. resuming work that began last year. The latest phase of the project kicked off the week of March 30, 2026, bringing renewed lane restrictions and changed traffic patterns to the corridor.

What Drivers Should Expect

Eastbound travelers will face the most noticeable changes. Roughly four miles of the eastbound roadway — from mile marker 3.9 to 8.0 — will be realigned to correct slope failures that have been encroaching on the highway shoulder for years. During construction, all eastbound traffic will be shifted onto the westbound lanes, creating head-to-head travel conditions. A reduced speed limit of 65 mph applies through the work zone, and heavy truck traffic is anticipated throughout the season.

Two existing bridges along the route are slated for full removal, with box culverts going in as replacements. Aging culverts elsewhere in the project area will be relined rather than replaced outright. The remaining six miles of roadway outside the realignment zone will be milled down and resurfaced with a new wearing course.

Project Background

This is the second year of a multi-season effort to address long-standing infrastructure problems on this segment of I-90 as it approaches the Montana state line. The slope failures prompting the eastbound realignment have been documented for several years, making the corridor a priority for state transportation officials. The full project is scheduled to wrap up by October 31, 2026.

Montana’s broader infrastructure push has drawn attention in recent months. Governor Greg Gianforte has been actively courting out-of-state businesses, including a major manufacturing expansion that would bring significant economic activity and freight traffic to the region — making reliable highway corridors increasingly important to the state’s economic planning.