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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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AASHTOWare™ Bridge Rating (BrR) software is available to consultants and local agencies for use on Illinois structures, at no charge.  AASHTOWare™ Bridge Design (BrD) software is available at a discounted rate to consultant and local agencies for use on Illinois structures.  All AASHTOWare licenses are valid July 1st through June 30th of the following year.  You will be required to renew your license each year prior to July 1st.  AASHTOWare Bridge Rating is the preferred software to perform load ratings.

Please do not contact AASHTO and ProMiles for technical support.  IDOT provides technical support to all licensees under this reduced fee program.  Technical support questions should only be sent to

For structure types that cannot be analyzed using AASHTOWare Bridge Ratings, please contact the Bureau for further guidance.

BrR License Request 

The following import files have been prepared by the Bureau of Bridges & Structures for IDOT specific elements.  Their use is not mandatory but are being shared here in an effort to reduce error and cost; see disclaimer below.  To ensure greater accuracy for all, please notify technical support of any discrepancies found.  Revisions to these files will be made as AASHTOWare and load rating policies change.  Notification of revisions will be made through IDOT’s Bureau of Bridges & Structures subscription service.

BrR Import Files (Agency Specific)
(Save file to your computer)

Illinois Rating Vehicles (revised November 2021)
Prestressed Shapes (revised August 2023)
Materials (revised November 2021)
Appurtenances (revised November 2021)
LFR Analysis Template (revised April 2023)
LRFR Analysis Template (revised April 2023)

Notice of Disclaimer: IDOT offers the files, documents, and applications from this web page on an “as is” basis. All warranties and representations of any kind with regard to any downloaded file are disclaimed, including the implied warranties of merchantability and fitness for a particular use. Under no circumstance will IDOT or any of its employees be liable for any consequential, incidental, special or exemplary damages even if apprised of the likelihood of such damages occurring. IDOT does not warrant the files, applications or documents against deficiencies of any kind. The use of any of the documents, files or applications for work which is under contract, does not relieve the consultant from any obligations assumed by the contract, or from complete and proper fulfillment of the terms of the contract, nor does it entitle the consultant to compensation for damages or loss which could be attributed to such use.