Pavement Thickness Design Analysis Using Existing Pavement Structures for Road Upgrading on Kedamean–Sidoraharjo–Randegan Road, Gresik Regency

Abstract

This study focuses on analyzing the required pavement thickness for upgrading both rigid and flexible pavement structures on the Kedamean–Sidoraharjo–Randegan road in Gresik Regency, East Java. The approach emphasizes the reuse of existing pavement layers to optimize construction efficiency and reduce costs. This strategy aligns with the principles of sustainable infrastructure development, minimizing the need for full-depth reconstruction while maintaining structural performance. The analysis was carried out using the 2017 Indonesian Pavement Design Manual (MDPJ 2017) for flexible pavement and Pd T-14-2003 for rigid pavement. Field data such as Dynamic Cone Penetrometer (DCP) results, traffic load projections, and subgrade support values were utilized to determine the structural capacity of the existing pavement layers. These were then incorporated into the new design to calculate the required additional thickness, considering traffic projections for both 20-year and 40-year service life. Findings from this study demonstrate that the incorporation of existing pavement structures can significantly reduce the required thickness of new pavement layers, thereby lowering material usage and construction duration. The outcomes are expected to support decision-making for future road improvement projects by presenting a more sustainable and cost-effective pavement design method suited to regional conditions.