Skip to main content

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.

Illinois Department of Transportation

Illinois Highway Information System Roadway Information & Procedure Manual

July 1, 2014

Table of Contents

The purpose of this manual is two-fold. The first is to define what, why and how roadway data is collected. Then once information is collected, to explain when and how it is entered into the Illinois Roadway Information System (IRIS).

Title

Footer

Contact Us

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

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

Helpful Links

Stay Informed