Knik River Bridge Case Study

Keeping Alaska connected during bridge closure.

A critical link. A smart detour. A safer solution.

When a scheduled bridge closure threatened to disrupt traffic on one of Alaska’s most heavily traveled routes—the Glenn Highway over the Knik River Bridge—transportation officials turned to an innovative solution to keep vehicles moving safely and efficiently.

The Road Zipper System™ was deployed to create a temporary, moveable barrier system that maintained peak-direction traffic flow and improved work zone safety during the long-term closure and rehabilitation of the bridge.

Project Snapshot

Location: Glenn Highway / Knik River Bridge, Alaska
Challenge: Long-term bridge closure for rehabilitation
Traffic Volume: Thousands of daily commuters between Anchorage and the Matanuska-Susitna Valley
Solution: Road Zipper Moveable Barrier for contraflow lane management
Goal: Maintain mobility during full closure of one bridge span

The Challenge

The Knik River Bridge serves as a vital connector for commuters, freight, and emergency services. With one span fully closed for deck work and repairs, Alaska DOT faced the risk of severe congestion, delays, and increased crash potential along the corridor.

The Road Zipper Advantage

By implementing the Road Zipper System, Alaska DOT was able to:

Dynamically reconfigure lanes based on peak traffic demand
Create safe separation between opposing traffic during contraflow operations
Minimize driver confusion and delays during an extended construction schedule
Avoid the need for temporary detours or widening projects

Each day, the moveable barrier was repositioned to accommodate two lanes inbound to Anchorage in the morning, then shifted to two lanes outbound in the afternoon—maximizing roadway efficiency and safety in both directions.

Maintained critical access

for thousands of commuters.

Enhanced work zone safety

for crews and drivers alike.

All-weather performance

in Alaska’s harsh climate.

Cost-effective detour alternative

that avoided major infrastructure expansion.

Positive public feedback

due to smooth transitions and reduced delays.

Building smarter resilience in remote regions.

The Knik River Bridge project demonstrates how smart traffic management tools like the Road Zipper can deliver real results—even in remote, rugged environments like Alaska. As infrastructure ages and traffic demands grow, flexible solutions like these ensure safety, mobility, and peace of mind for the public.

Need a safer, more efficient way to manage traffic during construction or closures?

Connect with us to learn how the Road Zipper System can support your next project.