WebJun 17, 2024 · The international roughness index (IRI) is a tool to identify the state of pavement degradation. The IRI value grows as pavement age increases [ 8 ]. The degree … WebField data in terms of the international roughness index (IRI) were gathered over more than 530 km using a smartphone accelerometer and the BumpRecorder application. The …

Precise International Roughness Index Calculation

WebThe International Roughness Index (IRI) is the statistic used to measure how smooth or rough a pavement surface is. The lower the calculated IRI, the smoother the pavement … WebJun 1, 2024 · The main purpose of this paper is to establish a speed related ride quality threshold by using the relationship of a jolt to the International Roughness Index (IRI). Jolt is felt when a driver... bincho signature

Precise International Roughness Index Calculation SpringerLink

WebDec 7, 2024 · Similarly, as a result of considering the distribution of Jeju pavements in the development of the roughness index, a model was obtained in which the index approaches 0 at the maximum IRI, which is 18.17 m/km; 10 at the minimum IRI, which is 0.2 m/km; and 5 at the repair standard IRI, which is 7 m/km. A diagram of this model is shown in Figure 7. The international roughness index (IRI) is the roughness index most commonly obtained from measured longitudinal road profiles. It is calculated using a quarter-car vehicle math model, whose response is accumulated to yield a roughness index with units of slope (in/mi, m/km, etc.). Although a universal term, … See more In the early 1980s the highway engineering community identified road roughness as the primary indicator of the utility of a highway network to road users. However, existing methods used to characterize roughness were not … See more The IRI is calculated from the road profile. This profile can be measured in several different ways. The most common measurements are … See more • Road roughness • Surface roughness See more • "Relating Road Roughness and Vehicle Speeds to Human Whole Body Vibration and Exposure Limits" by Ahlin and Granlund in … See more The IRI was defined as a mathematical property of a two-dimensional road profile (a longitudinal slice of the road showing elevation as it varies with longitudinal distance along a travelled track on the road). As such, it can be calculated from profiles obtained … See more The IRI generally has a reverse relationship with the PCI. A smooth road with low IRI usually has a high PCI. However, this is not always the case, and a road with low IRI could have a low PCI … See more • "The Little Book of Profiling", Sayers and Karamihas • "International Roughness Index" at The World Bank (WB) See more WebSep 24, 2024 · This method describes the procedure for determining the International roughness index (IRI) of pavement surfaces in English units. Contents 106.3.2.59.1 Equipment 106.3.2.59.2 Inertial Profiler Certification Procedures 106.3.2.59.3 Construction Acceptance Procedures 106.3.2.59.3.1 Segment Smoothness 106.3.2.59.3.1.1 Inserting … bincho tan