Ann: EdenCrete - GDOT Sales and Marketing Update, page-30

The rules have long allowed allow the use of proprietary products if a 'need' is found. It isn't too hard to find a situation that 'needs' Edencrete. The 2019 rule changes simply accept that the exemption was a compete farce.

From 2013.

The specification of a particular product may restrict competition as the pool of available products is reduced to the product selected. In some cases, however, the need for a particular product outweighs the need to procure products competitively. 23 CFR 635.411 provides the regulatory authority for FHWA's participation in the cost of a patented or proprietary product.

https://www.fhwa.dot.gov/programadmin/contracts/011106qa.cfm

For some reason Edencrete is not winning any DOT tenders outside Georgia of Colorado.