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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.

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Illinois Department of Transportation

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

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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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