Structural and functional prediction of pavement condition (A case study on south arterial road, Yogyakarta)

Abstract

Pavement conditions will reduce the level of service over time. It is characterized by the occurrence of structural damage of the road pavement layers in which the neglect for a long period can worsen the condition of the pavement layers that can affect the traffic safety and comfort. Road pavement performance is determined based on the requirements of the functional and structural condition. The functional conditional requirements relate to roughness, pavement surface aggravation, while the structural condition requirements relate to the pavement strength or carrying capacity in serving the load and the traffic flow. The aim of this research is to evaluate the functional and structural of the flexible pavement on south arterial road in Yogyakarta and to provide recommendation of maintenance and rehabilitation. The functional evaluation of pavement is based on DGH and PCI method, which combines International Roughness Index (IRI) and Pavement Condition Index (PCI) values, while structural pavement evaluation is performed by analyzing the deflection value of Falling Weight Deflectometer (FWD) measurement analyzed by AASHTO 1993 with the output being the Structural Number (SN) value, where SN effective/SNfuture ratio results Structural Condition Index (SCI) value which determines whether a pavement requires overlay or not. The results of functional analysis based on IRI and PCI values indicate that the road conditions for each segment are good, damaged and heavily damaged. The structural analysis for 2018 shows all segments yield SCI value<1, which means they require an overlay. The segments requiring functional overlay are Km 00 + 000 up to 02 + 400, Km 04 + 400 up to 05 + 600, Km 07 + 600 up to 13 + 200, Km and Km 16 + 000 up to 18 + 400. Meanwhile, the segments that require structural overlay are: Km 02 + 400 up to 04 + 400, Km 05 + 600 up to 07 + 600 and Km 13 + 200 up to 16 + 000.