The Federal Highway Administration (FHWA) has issued new guidance for state Departments of Transportation (DOTs) wishing to certify the need for the use of Patented and Proprietary Products. The guidance is contained in the following documents:
- Information Letter of 30 November 2011 from King W. Gee to FHWA Divisions titled “Guidance on Patented and Proprietary Product Approvals”
- Questions and Answers Regarding Title 23 CFR 635.411
- AASHTO’s Approved Product Evaluation List (APEL)
- Database of FHWA Approvals of Patented and Proprietary Products
