 The reuse of recycled asphalt pavement, rap, can provide economic, social, and environmental benefits. In order to improve the performance of these materials, waste cooking oil, WCO, has been used as a rejuvenator. Based on calculations, it was estimated that approximately 32,000 tons of rap and 22,000 tons of WCO are available annually in the city of Bukramanga, Colombia. International standards were reviewed and compared with local regulations to develop a methodology for determining the optimal percentage of WCO to add to rap for hot asphalt mix preparation. It was suggested that testing should be conducted at various percentages ranging from 3% to 6%, with the selected percentage being determined by the results of stability and flow tests, percent air voids, and bulk density. Finally, the authors proposed using the Marshall method to determine the appropriate percentage of asphalt based on stability and flow tests, percent air voids, and bulk density. This article was authored by Dana Penaloza, Dana Vazquez, Valentina Valdiviaso, and others. We are article.tv, links in the description below.