Sholihin, Chairu (2025) Kajian Kerusakan Jalan Menggunakan Metode Iri Berdasarkan Kecepatan Kendaraan Pada Ruas Jalan Lintas Sumatera Provinsi Riau. Other thesis, Universitas Islam Riau.

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Abstract

Road damage is a physical condition that damages or disrupts the quality and safety of roads, which can include various elements of existing road infrastructure. Data on road pavement surface conditions can be expressed in IRI (International Roughness Index) values. Roughness is influenced by vehicle operational parameters, which include wheel suspension, vehicle shape, vehicle level position and speed. This research is applied research with the aim of calculating vehicle traffic speeds at several points on the Trans Sumatra road sections in Riau Province and analyzing the condition of the road pavement surface which can be expressed in IRI values. The research location is located on a national road section, starting from the starting point from Simpang Kayu Ara (Pekanbaru City) to Simpang Lago (Pelalawan Regency) which consists of 3 (three) road sections with a total length of 43 Km. The Trans Sumatra Road section is a type I road class with the existing condition of the Trans Sumatra road section having composite pavement construction (Composite Pavement). The stages carried out include preparation, data collection, analysis and discussion of IRI values, analyzing and simulating data, as well as conclusions and suggestions. The results of data processing and simulation at each speed will be able to determine road conditions and the type of road handling. In the results of calculating the average traffic speed, it can be concluded that the average speed of vehicle traffic passing through the Trans-Sumatra road in Riau Province with rounding is 40 km/hour, which is in accordance with direct data collection in the field using a speedgun. If the average speed of passing vehicles is 40 km/hour then an IRI value of 99.33% is obtained in steady condition, if the average speed of passing vehicles is 60 km/hour then an IRI value of 100% is obtained in steady condition and If the average speed of passing vehicles is 80 km/hour, an IRI value of 100% is obtained in steady condition. Keywords : IRI (International Roughness Index), Road Conditions, Vehicles, Speed

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