Skip to main content

Welcome to IDOT's new website design! The address for some web pages has changed, so be sure to update any saved favorites as needed.

Bridges and Structures Services

Support your bridge and structural projects with our extensive collection of resources, including webinars, forms, inspection guidelines, and training materials. Designed for engineers and project managers, these tools will help you effectively navigate the complexities of bridge construction and maintenance.

The following are the reference materials for executing a contract for bridge and structural work.

Bridge Manual

Bridge Manual 2025

Bridge Manual 2023

All Bridge Designer (ABD) Memos are directives from IDOT's Bureau of Bridges and Structures advising bridge designers on bridge design policy changes. Navigate to All Bridge Designer Memorandums to view the current listing.

Seismic Manual

Sign Structures

Need Help?

For inquiries regarding bridges and structures, refer to the contact directory of the IDOT Bureau of Bridges and Structures.