Analysis of Pavement Thickness on Mastrip Highway Due to the Change in Road Authority Status

The change in the status of Jalan Raya Mastrip from a regional-level road to a national road has led to an increase in traffic volume and vehicle classification. The added traffic load has rendered the existing pavement structure inadequate, resulting in damage at several points. This study aims to analyze the required pavement thickness before and after the status change using the Average Daily Traffic (ADT) survey, road geometric survey, and the SNI 1732-1989-F method. Survey results indicate that the ADT in 2025 is 4,966 vehicles/day. The existing pavement structure consists of a 10 cm surface layer, a 20 cm base course, and a 21 cm subbase course. Following the road’s change in status to a national arterial road, an additional 18 cm overlay layer is required to enhance load-bearing capacity and extend the pavement’s design life. This research can serve as a technical reference for adapting pavement design to changes in traffic management policy. The findings are expected to support the development of safer, more durable, and efficient road infrastructure.