IDOT to Implement Split-Lane Configuration on I-80
The traffic pattern shift begins November 2 to facilitate ongoing construction of center interstate lanes.
Updated on Oct. 29, 2026 in Openings & Closings
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The Illinois Department of Transportation will implement a temporary split-lane configuration on westbound Interstate 80 in Joliet starting November 2, 2026. This traffic pattern change will last for approximately one month to allow crews to build the center lanes of the highway.
Why it matters
The reconfiguration is necessary to provide a safe work zone for ongoing interstate expansion projects. Separating traffic flow allows crews to access the center of the roadway while maintaining throughput for commuters.
Traffic stops are restricted to a maximum duration of 15 minutes during overnight hours. The split-lane configuration is scheduled to remain in effect for one month.
The players
Illinois Department of Transportation
The state agency responsible for the planning, construction, and maintenance of Illinois transportation infrastructure.
The details
Westbound traffic will split into two lanes separated by concrete barriers after Center Street, with the left lane designated for through traffic to Houbolt Road and the right lane providing access to the Larkin Avenue exit. Construction crews will finalize this setup through overnight lane reductions and ramp closures occurring on October 31 and November 1.
Timeline
Overnight on October 31, 2026: Westbound I-80 reduces to one lane.
November 1, 2026: Westbound I-80 reduces to one lane and Larkin Avenue ramps close.
November 2, 2026: Implementation of the new split-lane traffic pattern begins.
Market Landscape
The split-lane configuration follows the broader phasing strategy set by the I-80 corridor reconstruction project. This approach allows infrastructure agencies to accelerate timeline milestones while maintaining critical regional freight and commuter access.
Commuters should prepare for potential delays caused by lane reductions and 15-minute traffic stops occurring overnight between October 31 and November 1. Access to Larkin Avenue from westbound I-80 will be unavailable on November 1 during the ramp closures.
The takeaway
Drivers should plan for extra travel time and consider alternative routes during the implementation of the new traffic pattern. Staying informed on project updates helps minimize disruptions to your daily commute through the construction zone.
What happens next
A similar split-lane configuration is planned for the eastbound center lanes later in the fall of 2026.
Further reading
For more information on local road projects, visit the Joliet Openings & Closings section.
More information
View the full project schedule on the I-80 project information and submission portal.
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Do you feel local road projects in your area are currently well-managed to minimize traffic delays?
