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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.

Pavement Technology Advisories (PTA)

PTAs are short informational documents covering a wide variety of topics pertinent to highway engineering at IDOT and are a valuable resource to anyone interested in highway engineering - planning, designing, building, and/or maintaining roads. PTAs are categorized into three main topic groups: Design, Construction, and Materials; Maintenance, Repair, and Rehabilitation; and Testing and Data Collection.

Design, Construction and Materials Series

Maintenance, Repair and Rehabilitation Series

Testing and Data Collection Series

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