Perencanaan Tebal Perkerasan Jalan Tol Solo- Yogyakarta- YIA Kulon Progo: Metode Manual Desain Perkerasan Jalan 2024

Abstract

The construction of the Solo–Yogyakarta–Yogyakarta International Airport (YIA) Kulon Progo Toll Road Section II Package 2.2B requires a pavement structure that satisfies technical requirements while remaining economically efficient throughout its service life. The STA 55+750–STA 57+839 segment was previously designed based on the 2017 Road Pavement Design Manual; therefore, redesign using the 2024 Road Pavement Design Manual and life cycle cost evaluation is required. This study aims to determine pavement layer thicknesses and identify the design alternative with the lowest discounted life cycle cost (DLCC). The data consisted of primary data obtained from a 1 × 24-hour traffic-counting survey on a comparable toll road segment and secondary data comprising subgrade CBR values, road technical data, and unit prices. Traffic was projected using an annual growth rate of 4.8%. The analysis included calculating design traffic in terms of CESA5 for flexible pavement and the cumulative number of commercial vehicle axles (JSKN) for rigid pavement, determining pavement structures based on MDPJ 2024, preparing construction cost estimates, and calculating LCC and DLCC over a 40- year analysis period. The results showed a segment CBR value of 6.95%, a CESA5 value of 12.88 million ESA, and a JSKN value of 5.34 × 10⁷. The flexible pavement alternatives consisted of structures with CTB thicknesses of 150 mm, 200 mm, 250 mm, and 300 mm, as well as an aggregate-base alternative. The rigid pavement was designed as Jointed Plain Concrete Pavement (JPCP), comprising a 290 mm concrete slab, a 150 mm lean concrete subbase, a 200 mm Class A aggregate base, and a 200 mm coarse granular selected fill. Rigid pavement produced the lowest DLCC value of Rp22,449,296,272.82. Therefore, rigid pavement was selected as the most economical alternative because it meets the technical requirements and provides the lowest discounted life cycle cost.