Riverside Contracting to Build Johnson Lane Interchange
The Montana Department of Transportation selected Riverside Contracting Inc. to overhaul the interchange into a diverging diamond.
Updated on Oct. 23, 2026 in Construction
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The Montana Department of Transportation has awarded a contract to Riverside Contracting Inc. to convert the Johnson Lane Interchange into a diverging diamond design. The project aims to boost capacity and safety near the Interstate 90 crossing.
Why it matters
The new diverging diamond configuration shifts traffic to the left side of the road to improve traffic flow and reduce congestion. This structural change is designed to enhance safety and efficiency for residents in the Billings area.
The construction project is scheduled to span 3 full construction seasons. Work includes comprehensive roadway improvements and the installation of new traffic signals at multiple local intersections.
The players
Montana Department of Transportation
This state agency is responsible for the planning, design, and maintenance of public transportation infrastructure across Montana.
Riverside Contracting Inc.
This is a private construction firm that has been selected to execute the infrastructure project at the Johnson Lane Interchange.
The details
The project will transform the interchange with bridge reconstructions and extensive upgrades to North Frontage Road, Old Hardin Road, Cole Street, and Becraft Lane. Plans also incorporate a new shared-use path and sidewalk improvements to support local pedestrian traffic.
Timeline
The contract was awarded to Riverside Contracting Inc. in October 2026.
Major construction of the diverging diamond interchange is slated to begin in spring 2027.
Market Landscape
The project represents a broader regional shift toward utilizing specialized geometric designs to manage growing traffic demands on critical highway arteries. This investment positions the department to address long-standing congestion issues through advanced civil engineering standards.
Residents should prepare for upcoming work on North Frontage Road, Old Hardin Road, and Cole Street as the project progresses. While current utility relocation is minor, commuters can expect long-term traffic pattern changes once construction begins in the spring.
The takeaway
Drivers should monitor official local updates as work on the bridge and adjacent roads begins this spring. Adopting new traffic habits early can help maintain safety during the transition to the new interchange layout.
Further reading
Learn more about local infrastructure improvements on the Construction section page.
Source note: This article includes information reported by Billings Gazette.
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Do you support replacing traditional traffic interchanges with diverging diamond designs to improve local road safety?
