I-490 Tollway

I-490/I-294 Interchange Project

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 2024, work will include completing the remaining retaining walls and bridges over Grand Avenue, the Union Pacific Railroad and North Avenue/Lake Street. In addition, work will include reconstruction of mainline pavement on northbound I-294 and completion of the flyover bridge from northbound I-294 to northbound I-490.

The work is anticipated to be completed by early 2025.

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WB Lake Street Road Closure Detour
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I-290 Frontage Road under I-294 Closure
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EB I-290 to EB Lake Street Detour
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Construction Update (7/11/24)

Local Roads
The ramp connecting eastbound I-290 to eastbound North Avenue/Lake Street is scheduled to close at midnight on Friday, July 12. A detour will be posted routing eastbound I-290 traffic to the St. Charles Interchange, to westbound I-290 and to exit onto Lake Street for access to eastbound North Avenue/Lake Street and the northbound I-294 ramp. This detour is scheduled to remain in place through 5 a.m. on Monday, July 15. 

Eastbound Lake Street will be closed just west of I-294 starting at midnight on Friday, July 12. A detour will be posted routing traffic to eastbound North Avenue to Railroad Avenue to Lake Street. This detour is scheduled to remain in place through 5 a.m. on Monday, July 15. A similar detour will be posted the night of Friday, July 19, starting at 10 p.m. and will remain in place until 6 a.m. on Saturday, July 20.

Westbound Lake Street is closed at I-294 and a detour is posted. Traffic is scheduled to remain in this configuration through fall. 

The I-290 Frontage Road between County Line Road and Northwest Avenue is closed with detours. Traffic will remain in this configuration through July.

I-294 Mainline
Between North Avenue/Lake Street and the O'Hare Oasis traffic is shifted in both directions, including:

  • Between North Avenue and Wolf Road, two northbound lanes are traveling on the southbound side of the Tollway.
  • Between North Avenue and St. Charles Road, one southbound lane is traveling on the northbound side of the Tollway.

Traffic is scheduled to remain in this configuration through summer. 

See the Daily Construction Alert for up-to-date information.

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.