Are There Any Correlations Between the Functional and Structural Performance of Indonesian National Road Conditions?

The deterioration of road conditions affects the safety and comfort of road users. The initial stage of implementing road rehabilitation and maintenance management involves conducting an inventory through routine assessments of pavement functional and structural conditions. Evaluating functional and structural conditions is essential for determining the appropriate rehabilitation and maintenance methods. However, evaluations are typically focused only on functional conditions. Therefore, it is necessary to investigate whether a relationship exists between the functional and structural conditions of roads to determine their correlation. This study aims to evaluate the functional and structural conditions of three national road sections: the Simpang Tiga East Ring Road –Pati/Kudus District Boundary, Lingkar Pati, and Wangon –Menganti. The functional conditions were assessed using the Hawkeye 2000 vehicle, which generates Pavement Condition Index (PCI) data for each road segment, providing the average PCI value and the condition of each segment. Meanwhile, the Falling Weight Deflectometer (FWD) was used to obtain deflection data, which was utilized to calculate the representative deflection value (𝐷represented) and elastic modulus (𝐸). This study concludes that there is either no correlation or only a weak correlation between the functional and structural conditions of national roads in the three sections analyzed. Therefore, it is recommended to evaluate both functional and structural conditions simultaneously to ensure that road rehabilitation and maintenance management achieves its objectives by providing safe and reliable roads