US 20 at Mclean Blvd Interchange Project


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US Route 20 at McLean Boulevard Interchange Reconstruction Project

The Illinois Department of Transportation (IDOT) plans to perform a total reconstruction of the US 20 over McLean Boulevard interchange into a Single Point Urban Interchange (SPUI).

A Single Point Urban Interchange is an interchange with a single intersection versus two existing intersections at the ramp terminal.


In addition, IDOT will replace and widen the US 20 bridge structure over McLean Boulevard, while constructing two new retaining walls. Finally, IDOT will widen and reconstruct McLean Boulevard from south of Fleetwood Drive to north of Lillian Street into a 4-lane divided cross section with left/right turn lanes at major intersections.

The purpose of the $50 million dollar project is to enhance the flow of traffic and reduce the potential for accidents through improved safety features. The goal of the US Route 20 Interchange Reconstruction is to provide a safer ride for the motoring public. IDOT anticipates more commercial development along with urban renewal and public advancement. Motorists should expect delays and use caution when workers are present. IDOT suggests using alternate routes and public transportation.

This site has been created to facilitate public input and provide information about the project and schedule. We invite you to explore the site and provide your comments and concerns regarding the project through our “Public Participation” section.

This site will be updated periodically as the project progresses. The Illinois Department of Transportation (IDOT) wishes to thank you for your support and patience.

Note: IDOT projects typically have three distinct phases. Phase I (or the project Study) consists of developing the project scope, environmental studies and preliminary design of a project. Phase II (Design) consists of refining the design to develop contract plans and land acquisition. Phase III (Construction) consists of the actual construction of the project.

The scope of work includes the total reconstruction of the US 20 over McLean Blvd interchange into Single Point Urban Interchange (SPUI) - (a single point intersection versus two existing intersections at the ramp terminals), including replacing and widening the US 20 bridge structure over McLean Blvd., construction of 2 new concrete retaining walls, widening and reconstruction of McLean Blvd from south of Fleetwood Drive to north of Lillian Street into a 4-lane divided cross section (2 traffic lanes in each direction) with turn lanes(left /right turn lanes) at the major intersections, realignment of the existing Weld Road intersection with Shepherd Drive to enhance safety and remove the existing sharp curve/scissors configuration, reconstruction and widening of Fleetwood Drive intersection in the City of Elgin, Kane County. Two exclusive exit lanes will be added along US 20 mainline in the eastbound direction at McLean Blvd to facilitate and enhance exit maneuvers to Mclean Blvd, improve safety, and eliminate traffic backups. The proposed pavement along US 20 will be continuously reinforced concrete pavement (CRC) to provide an extended pavement life. The proposed pavement along McLean Blvd will be portland cement jointed concrete pavement. A total of four detention ponds will be constructed within the interchange area to temporarily detain the additional precipitation runoff that will result from the additional widened pavement that will be constructed by the improvement. The basins have been designed with dry wells to encourage infiltration.

The total length of the project is 1.33 miles.

Existing traffic signals at the intersections of Spartan Drive, Fleetwood Drive, US 20 ramps terminals with McLean Blvd and Lillian Street will be modernized to current standards and interconnected to provide traffic flow progression. Lighting will be installed along US 20 within the project limit for a distance of 2.0 miles within the interchange boundaries and along the proposed US 20 ramps at McLean Blvd. Aesthetic treatments are included on the proposed two concrete retaining walls using an Ashlar finish in addition specialty landscaping in coordination with the City of Elgin. Pipe sleeve crossings will be added within the interchange area to facilitate future irrigation system installation by the City of Elgin.

Sidewalks will be provided on the west side of McLean Blvd. from Spartan Dr. to Meyer St. and on the east side from Fleetwood Dr. to Meyer St. to accommodate pedestrian activities with certain limited areas where sidewalks widths will narrow to minimize additional land acquisition. The outer traffic lanes along McLean Blvd will be built as 14 feet wide lanes instead of the traditional 12-foot wide lanes in order to accommodate a lane to be shared by vehicles and bicycles on both sides of the roadway along McLean Blvd within the project limits. The project will be stage constructed whereby Mclean Blvd and US 20 will be open to traffic at all times to minimize delays as much as possible to the motoring public. It is anticipated that a total of 3 construction seasons will be required: one season for the advance contract (# 60K90), two seasons for the main contract.

In order to expedite the rehabilitation of the interchange, an advance contract was developed. The advance contract was let 8/5/2011 and was completed in May, 2013. The advance contract includes construction of the two proposed retaining walls, realignment of Weld Road, intersection widening and reconstruction of Fleetwood Drive with Mclean Blvd and widening the existing eastbound US 20 bridge over McLean Blvd to accommodate two lanes of traffic in each direction on US 20 during construction thus minimizing traffic backups, queues and delays. Please note U.S. 20 lance closures will be allowed only at night.

The main project #60H45 was on the April 2012 letting & subject to awarding of the contract, the anticipated start is in Summer 2012. The estimated construction duration for the main contract will extend three construction seasons tentatively (until 9/2015) due to utilities delays, piling issues and discovery of contaminated soil near the removed old bridge. The total estimated construction cost for the entire project is approx. 50 million dollars.

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As the US Route 20 Interchange Reconstruction Project progresses, IDOT will periodically update this website to assure that the motorists of Illinois are kept informed of project developments, public involvement opportunities, and construction related activities.

The Project Team is interested in hearing from you! If you have questions or ideas about the project, please fill out the feedback form or contact us at:

Illinois Department of Transportation
Office of Communications
201 West Center Court
Schaumburg, IL 60196

Please continue to visit the US Route 20 Interchange Reconstruction Project website for periodic updates throughout the course of the US Route 20 Interchange Reconstruction Project.

The Illinois Department of Transportation looks forward to your continued input and support.

Press Releases

Press releases will be posted here as they become available.


Newspaper articles will be posted here as they become available.

Construction Fast Facts

  • Project Start: July, 2012
  • Project End: Fall 2016
  • Project Cost: $44,400,000
  • Project Municipality: Elgin
  • Project County: Kane

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Construction Progress of New Route 20 Overpass
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