Analisis Ekonomi Rekayasa dan Keandalan Struktur Perkerasan Kaku pada Proyek Pembangunan Jalan Tol Trans-Sumatera Ruas X-

Imawan Sumanto (Universitas Ratu Samban)
Rezi Munizar (Universitas Ratu Samban)

Inventa: Journal of Science, Technology, and Innovation
Vol 2 No 1 (2026): : August: Inventa: Journal of Science, Technology, and Innovation

The construction of the Trans-Sumatra Toll Road requires a pavement design strategy capable of ensuring both structural reliability and economic efficiency throughout the infrastructure’s service life. This study aims to analyze the structural performance of rigid pavement and its economic feasibility through a Life Cycle Cost Analysis (LCCA) approach for the Trans-Sumatra Toll Road Project, Section X-Y. The research methodology employs an empirical study based on engineering analysis and technical-economic simulation, utilizing traffic data, subgrade characteristics, material parameters, and life cycle cost modeling. The results show that the optimal design consists of a concrete slab with a strength of f’c 45 MPa and a thickness of 30 cm, a 10-cm layer of lean concrete, and a 15-cm layer of Class A aggregate to withstand a cumulative load of 1.2 × 10⁸ ESAL over 40 years. The economic analysis yielded a positive NPV of Rp4.235 billion, an IRR of 13.42%, and a BCR of 1.28. Sensitivity testing showed that the investment remains feasible despite changes in construction costs and decreases in traffic volume. This study contributes to the development of road infrastructure evaluation based on the integration of structural performance and life-cycle economics.