Analisis Ekonomi Lapis Pondasi Bawah Telford Vs Rigid Pavement menggunakan Life Cycle Cost Analysis

Abstract

The growing demand for road construction and maintenance requires sub-base solutions that are not only technically reliable but also economically efficient in the long term. This study compares the economic efficiency of Telford (crushed stone) and Rigid (concrete) sub-base methods using the Life Cycle Cost Analysis (LCCA) approach. The 20-year LCCA simulation with a 4% discount rate integrates data from the 2024 Ministry of Public Works and Housing (PUPR) Unit Price Analysis (AHSP), experimental studies on concrete, and historical road maintenance data. The analysis covers initial construction costs, maintenance, rehabilitation, and sensitivity tests on material inflation and traffic volume. The rigid sub-base demonstrates economic advantages with an NPV of IDR 3.3 billion/km (vs. Telford: IDR 3.9 billion/km), despite having 44% higher initial costs. Telford’s maintenance costs are 38% higher due to increased repair frequency. For traffic volumes exceeding 500 vehicles/day, the rigid sub-base reaches its break-even point in the 8th year. Based on traffic volume, the technical recommendation suggests that Telford is optimal for local roads (<300 vehicles/day), while rigid sub-base is more economical for arterial roads (>500 vehicles/day).