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Illinois Department of Transportation

Off-System Structures Bundling Program

Districts 1-9

Delivery Method: Design Bid Build (DBB)

Project Summary

IDOT is implementing a program to bundle off-system bridges and culverts (structures) requiring complete replacement or reconstruction. These off-system structures are located on roadways that are neither part of the Federal-aid Highway System nor the Illinois System of Highways. They are typically owned by counties, municipalities or townships. Bundling allows multiple structures to undergo engineering and construction as a bundle. This approach streamlines the process, enabling design teams and contractors to save time by designing and constructing multiple structures within a single project.  In 2025, IDOT selected 180 structures for the OSSBP that were grouped into 31 bundles, grouped into three waves, and located in all 9 Districts. The program is currently in development and the design for the 31 bundles (all three waves) is scheduled to be completed by the end of 2028. Construction lettings could begin as early as the start of 2027.

Location – Statewide

Project Goals

  • Improve safety
  • Expedite delivery of structures
  • Improve connectivity
  • Improve condition of the overall structure inventory
  • Ensure financial stewardship of public funds through optimal delivery of bundled structures
  • Create opportunities and work experiences for small business to grow and thrive

Project Milestones

IN-PROGRESS

Planning Phase:

Screened and Identified 180 Structures (31 Bundles) for Initial Program Call (complete)

September 15, 2025

Established Program Management Office (complete)

December 12, 2025

Planning for Phase I and II Engineering (complete)

June 29, 2026

Phase I and II Engineering Field Work (in progress)

March 1, 2026

Project Team

  • Program Management - Program Management Office
  • Preliminary Engineering (Phase I) and Final Design (Phase II) - Program Management Office

Why bundle bridges and culverts (structures)?

Bridge bundling allows us to improve structure conditions, increase public safety. This approach enables design teams and contractors to save time by designing and constructing multiple structures within a single project.  In addition, we create work opportunities for small businesses who may be interested in working on some of the bundles.