Illinois Department of Transportation, Ann L. Schneider, Secretary
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The Quality Standard for Work Zone Traffic Control Devices

The Quality Standard for Work Zone Traffic Control Devices has been completely revised by the Illinois Department of Transportation. This manual has been revised to make references current with Department standards and specifications. This manual is now available online.

If you have any questions about the content of this manual, please contact Bureau of Safety Engineering at (217)782-3568.


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