A Study of the Cost Analysis of the Porous Pavement on a Freeway

Porous pavement performances are better than traditional pavements, but for some reasons which include the higher cost and complex construction techniques, porous asphalt is not widely used in Taiwan. Therefore, the concept of LCCA (Life Cycle Cost Analysis) is introduced in this study in order to analyze the cost required by different kinds of porous pavements. HDM-4 related parameters were first used to estimate the service life of porous pavement. As a result, the different types of porous pavements and asphalt pavement thickness showed different degrees of service life results. Type III of polymer modified asphalt concrete (conforming to CNS 14184 requirement) with asphalt pavement thickness 2.5 cm had the longest service life. The results of LCCA also indicates- that type III of polymer modified asphalt concrete 2.5 cm has the lowest cost, but is still more expensive than “Open-Graded Asphalt Friction Course.” For the sake of cost, therefore, the traditional friction course is still a better option.