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IL 13 (Carbondale to Carterville) Project

The Illinois Department of Transportation is moving forward with a project to add a third lane in each direction on Illinois Route 13 and a multiuse path from east of Giant City Road in Carbondale to west of Shawnee Trail in Carterville. Three contracts have already been awarded and are under construction between Giant City Road and the Jackson/Williamson county line. Future projects will include the following:

  • Improvements to IL 13 and Spillway Road which is estimated to cost $5 M and construction is anticipated to begin in 2023.
  • Improvements from east of Spillway Road to west Shawnee Trail which includes the additional lane in each direction, 4 structure replacements over Crab Orchard Lake, improvements to IL 13 and Cambria Road intersection and a multiuse path.  The design of this last section of IL 13 is underway and if funding is available, then construction is anticipated to begin in 2025.

Today, traffic levels are near 30,000 vehicles per day on the 4-lane roadway system that nears or exceeds acceptable capacity levels. This traffic, coupled with closely spaced intersections has compromised safety and traffic mobility and efficiency. In a seven year period from 2014 to 2020, there were a total of 456 crashes.  Two of the crashes resulted in 5 deaths and 30 other crashes resulted in 53 serious injuries.

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 I for the entire study limits (Giant City Road to Shawnee Trail) has been completed and the project report approved. A copy of the project report can be found under the “Resources” tab.  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.  We are currently in the design, land acquisition, and construction phase.  Giant City to the Williamson/Jackson county line is funded and under construction in 2021.  Spillway Road is funded and in the Design and land acquisition phase with construction planned for 2022.  Cambria Road is currently unfunded.


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.

Preferred Alternatives

The following alternates have been selected to proceed to the design stage.  Each preferred alternative includes an additional through lane on IL 13 eastbound and westbound.

Campground Road

Intersection of IL 13 and Campground Road closed and campground traffic routed to IL 13 via a frontage road to the Greenbrier Rd./IL 13 intersection. The north boat launch area will be permanently closed. As mitigation for the loss of the northern boat launch, improvements will be made to the Greenbriar Road boat launch. This portion of the project was completed in 2018.

Cambria Road/The Haven Entrance

Intersection of IL 13 and Cambria Road modified to a signalized “T” intersection with The Haven entrance limited to right in/right out.

Spillway Road

Intersection of IL 13 and Spillway Road remains a full access signalized intersection. The northbound right turn lane acceleration lane will be extended to allow easier merging with IL 13 traffic.

Reed Station Road

At the intersection of Illinois 13 and Reed Station dual left turn lanes will be constructed for the eastbound to northbound movement, the southbound to westbound right turn will be converted to a “free flow” movement.

Veteran’s Parkway

No change except for the additional through lane on IL 13 in each direction.

Bike Accommodation Options

The preferred alternate for bike accommodations is a 10’ wide side path constructed off of the roadway for cyclists. Across Crab Orchard Lake and through the high fill area between Giant City Road and Reed Station Road the path will be adjacent to the roadway but a barrier will be constructed to separate bike and vehicle traffic.

Contracts currently under construction will provide a completed bike path from Giant City Road to east of Reed Station Road.

Note: In order for a separate side path to be included in the project IDOT policy requires that another agency accept maintenance of the path. If no other agency will accept maintenance a side path will not be constructed and bike traffic will be accommodated on the shoulder of IL 13.

Field work began in the spring of 2013 and has been completed. The following environmental issues have been identified:

  1. The results of the wetland survey indicate the presence of jurisdictional wetlands within the project area.  Wetland impacts will be avoided, minimized or mitigated in coordination with the U.S. Fish and Wildlife Service, U.S. Army Corps of Engineers, ILEPA, and IDNR.
  2. The U.S. Fish and Wildlife Service lists the Indiana bat as a threatened or endangered species with suitable foraging and daytime summer roost habitats within the project area.  Because of the potential for adverse effects to roosting Indiana bats, IDOT will not clear trees April 1 through September 30.  With this commitment in place, the proposed improvement is not likely to adversely affect the Indiana bat.
  3. Close participation with the U.S. Fish and Wildlife Service will continue through the project duration to avoid, minimize and mitigate impacts to the Crab Orchard Wildlife Refuge.  Staff members representing the Refuge are included in the Project Study Group.

Throughout the beginning of 2014 several stakeholder meetings were held to present alternatives for the intersections within the project limits as well as possible bike accommodations. Information from the meetings was collected and presented to the Project Study Group. The Project Study Group reviewed the comments and determined which alternatives should proceed for further study. A public meeting was held at John A. Logan College on May 28, 2014 to present those chosen alternatives and to receive comments from the public.  Comments received from the meeting were used in conjunction with environmental studies and engineering studies to choose the preferred intersection type at each intersection. The preferred alternates were presented at a meeting on September 24, 2014 at John A. Logan College.  The exhibits that were presented can be viewed under the Resources Tab. 

Any further questions can be addressed by calling or visiting the IDOT Region 5, District 9 Headquarters at 2801 West Murphysboro Rd. on the west edge of Carbondale at (618) 549-2171.

Construction began in 2018 between the Giant City Road intersection and the Reed Station Road intersection and will be completed in 2020.  The construction projects involve adding a third lane on Illinois 13 in each direction, bridge construction, providing an off road multi-use path between the two intersections and safe crossings for both bike and pedestrians at Reed Station Road.

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