SCAM ALERT: A current text message smishing scam claims recipients owe money associated with traffic tickets, tolls, and other fines. These are not legitimate messages from the Illinois Department of Transportation. If you receive a message report it to the Federal Trade Commission and/or the FBI’s Internet Crime Complaint Center.

Resources

Technical Manuals

IDOT Bridge Data Guidance (Revised: 9/23/2025)
Bridge Inspection System (BIS) User Guide
FHWA - Recording and Coding Guide for the Structure Inventory and Appraisal of the Nations Bridges
- June 2012 Errata
- February 2012 Errata
Supplement to the AASHTO Manual for Bridge Element Inspection (MBEI)
Bridge Inspector's Reference Manual (BIRM)
Bridge Preservation Guide (Issued: November, 2019)
Structure Information and Procedure Manual (revised: June, 2021)
Structural Services Manual

Bridge Information
The following links are tools to offer bridge inspection and inventory information to the public.

NBIS Quality Assurance Review Summary Reports

FHWA National Bridge Inspection Program Update - Illinois

2016
2017
2018
2019
2020
2021

Contact Us

Illinois Department of
Transportation
Hanley Building
2300 S. Dirksen Parkway
Springfield, IL 62764

(217) 782-7820 or
TTY (866) 273-3681

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