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THE PRODUCTS EVALUATION CIRCULAR is a useful reference document for determining the status of new product proposals in the state of Illinois. The Circular is maintained by the Products Evaluation Unit in the Bureau of Materials and Physical Research and details the actions of the Illinois Highway Development Council (IHDC).

The IHDC has 10 members consisting of one representative from the Division of Aeronautics, two representatives from the nine Highway Districts, and seven representatives from Illinois Department of Transportation (IDOT) Central Bureaus. Both the Products Evaluation Unit and the IHDC were created in 1963 to evaluate new product proposals submitted to IDOT.

The IHDC normally meets three times per year to discuss these proposals. Council recommendations usually fit into one of the following categories: field test, laboratory test, approve, reject, or withdraw from consideration. These recommendations are detailed in the Products Evaluation Circular.

This document was created in 1968 as a means of sharing this information with others throughout both the state and the country. The Circular is updated after each IHDC meeting. Items found in the Circular include: an alphabetical listing by product name, an alphabetical listing by manufacturer, a listing by product category, and a chronological listing of each product proposal.
Download the Products Evaluation Circular
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