I-490 Tollway

I-490/I-294 Interchange Project

Project Overview

As part of the new I-490 Tollway, the Illinois Tollway is building a new interchange connecting I-490 to the Tri-State Tollway (I-294).

In 2020, work on the new I-490/I-294 Interchange includes continuing relocation of the ComEd distribution lines and transmission towers along I-294 and other utility relocation work that will clear the way for the new interchange construction. Major construction activities are anticipated to begin in 2020, including advance earthwork and retaining wall construction. The interchange work is scheduled to be complete in 2023.

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Construction Update (9/18/20)

Long-term shoulder closures are in place on I-294 between Electric Avenue and Lake Street and on the ramp carrying Lake Street traffic to northbound I-294 for electrical work.

Additional daily lane and ramp closures, some with detours, will be scheduled as needed to complete the work. See the Daily Construction Alert for details.

Customer Impacts

Lane closures and traffic shifts will be necessary to provide a work zone and safely accommodate traffic during construction.

Electronic message signs and construction signage will be put in place in advance to alert drivers to scheduled lane closures, traffic patterns and work zone speed limits.

To accommodate interchange construction, lane closures on local roads will also be needed.

Work Zone Safety

The Illinois Tollway is committed to ensuring that the Tri-State Tollway (I-294) remains safe for both drivers and workers during construction, which is part of the agency’s overall commitment to roadway safety.

Work zone speed limits are in effect in all construction zones 24/7 and drivers should continue to watch for changing traffic patterns and use caution, especially when workers are present.

Visit the Tollway’s Work Zone Safety page at illinoistollway.com.


The new I-490 Tollway, coupled with the Illinois Route 390 Tollway which was completed in 2017, will connect businesses and communities with one of the nation’s busiest airports, transit facilities, major freight transportation hubs, distribution centers and multiple interstate highways including the Jane Addams Memorial Tollway (I-90) and the Central Tri-State Tollway (I-294).


The Tollway is committed to building green and minimizing the environmental impact of construction by reducing, recycling and reusing materials. In addition to reducing the cost of this work, reuse of these materials reduces the need for virgin asphalt materials and reduces energy consumption, greenhouse gases and the volume of material that would otherwise be sent to landfills.