| dc.description.abstract | A low time interval of maintenance, lack of large-scale maintenance, budget limitation, environmental condition, increase of pavement condition standard, and increase of the transportation volume resulted in low pavement condition on the freeway. However, since 2013 Taiwan no longer focused on freeway construction. It intended to concentrate on short-cycle maintenance instead of long-cycle maintenance. Applied short-cycle maintenance indicates better road performance. However, it increases the budget due to the increase of maintenance interval. It becomes essential to embracing sustainability as an effective tool to assist in the selection of maintenance treatments for the roads. As an important feature of sustainability, Life Cycle Cost (LCC) emphasizing engineering economic, while Life Cycle Assessment (LCA) emphasizing environmental factors. The historical freeway database is needed for analyzing the pavement life cycle and long-term road network performance as a function of traffic volumes, traffic loading, pavement type, pavement condition, and maintenance standards. Calibrated HDM-4 used to simulate total life cycle conditions and costs for an analysis period with comparative cost. It estimates an economic analyses of different investment options. Road network data, climate data, vehicle fleet data, and traffic data were collected and analyzed. Based on the analysis of pavement distress, PCI, and IRI value, the result shows applying short-cycle is more acceptable for maintenance in Guanxi section. The Global Warming Potential (GWP) result shows that short-cycle maintenance contributed the smallest GWP with 0.46% up to 0.99% lower than another maintenance type. Maintenance interval, material consumption and pavement roughness would also be identified to impact the environment in this study. Therefore, integrated analysis for engineering LCC, environmental LCA, and IRI by Technique for Order Preference by Similarity to the Ideal Solution (TOPSIS) shows short-cycle as an optimum maintenance option. Likewise, this study validates that recent maintenance use in Guanxi section is better than the previous long-cycle while reducing the maintenance interval to 1.5 years might decrease the maintenance cost of short-cycle maintenance. This maintenance method worth for the next study and could be used as future maintenance strategy in another freeway sections in Taiwan. | en_US |