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Possible online services disruption due to Internet related outage

A worldwide technology outage is causing disruption to some State of Illinois online systems.  We are aware of this issue and are diligently working on restoration.

Agency Alert

Welcome to the new IDOT home page.  Our location has changed, please update any bookmarks.

Physical Research Reports (PRR)

PRR represent the results of research conducted by IDOT subject-matter experts on a wide variety of transportation issues since 1964.  For more information about how to create or submit a PRR, please contact the Bureau of Research

Click on any of the column headings to sort the list.

PRR No. Title