Results 241 to 250 of about 18,730,512 (283)

International Roughness Index and a New Solution for Its Calculation

Journal of Transportation Engineering, Part B: Pavements, 2018
AbstractThe international roughness index (IRI) has been one of most widely used indicators for characterizing road roughness.
Jie Li, Zhenwei Zhang, Wenzhu Wang
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Estimate non-Gaussian road roughness from international roughness index

Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering
Gaussian model is commonly used to characterize road roughness, while field measured data is usually non-Gaussian. A new method based on the amplitude modulation and International Roughness Index is proposed in this paper to estimate non-Gaussian road roughness. A modified Gamma distribution is proposed to describe the International Roughness Index and
Fei Xu, Feifei Ma, Kjell Ahlin
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International Roughness Index specifications around the world

Road Materials and Pavement Design, 2016
The International Roughness Index (IRI) is an indicator used worldwide for the characterisation of longitudinal road roughness. This study summarised IRI limit values for new, reconstructed, or rehabilitated roads; for in-service (existing) roads; and road classification schemes used around the world. An overview of practices in 35 US states and 29 non-
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The Predicted Model of International Roughness Index for Drainage Asphalt Pavement

2008
Roughness is a very important performance indicator in pavement maintenance management systems. The international rough index (IRI) of indicators was used as the core of roughness measuring of degree gradually in recent years domestically, but to predict a smooth degree of indicators the method is set up differently as there is a different prediction ...
Chien-Ta Chen, Ching-Tsung Hung, Chien-Cheng Chou, Ziping Chiang, Jyh-Dong Lin   +4 more
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International Roughness Index prediction model for flexible pavements

International Journal of Pavement Engineering, 2018
International Roughness Index (IRI) is a pavement performance indicator which reflects not only the pavement condition but also the ride quality and comfort level of road users.
Nader Abdelaziz, Ragaa T. Abd El-Hakim, Sherif M. El-Badawy, Hafez A. Afify   +3 more
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Preliminary assessment of ALOS/PALSAR images for the international roughness index estimation

2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2015
This article evaluates the relationship between SAR backscattering coefficients and the International Roughness Index (IRI). We used full-polarized ALOS/PALSAR amplitude images and field data gathered using laser sensors on-board of vehicles. We also evaluated LANDSAT-5/TM images for comparison.
Flavio Fortes Camargo, Edson Eyji Sano, Gustavo Macedo de Mello Baptista, Raphael de Oliveira Borges   +3 more
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Development of a crowdsourcing-based system for computing the international roughness index

International Journal of Pavement Engineering, 2020
Pavement roughness is one of the essential parameters of pavement quality affecting ride quality, driving safety, and fuel consumption.
Zahra Mirtabar, Amir Golroo, Ahmadreza Mahmoudzadeh, Farshad Barazandeh   +3 more
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Effects of the International Roughness Index and Rut Depth on Crash Rates

Transportation Research Record: Journal of the Transportation Research Board, 2018
Pavement distresses directly affect ride quality, and indirectly contribute to driver distraction, vehicle operation, and accidents. In this study, analysis was performed on highways in the states of Arizona, North Carolina, and Maryland to investigate the relationship between accident rate and pavement ride quality (roughness) and rut depth.
Michael Mamlouk, Mounica Vinayakamurthy, B. Shane Underwood, Kamil E. Kaloush   +3 more
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Estimating International Roughness Index from noisy profilograph measurements

2009 IEEE Intrumentation and Measurement Technology Conference, 2009
In this paper, we propose a method for estimating the international roughness index (IRI) of a pavement profile using data collected by a computerized profilograph making noisy measurements. We begin by modeling the pavement as a nonstationary stochastic process and show that, despite this nonstationarity, we can exploit the design of the profilograph ...
Justin S. Dyer, Dwight D. Day, Stephen A. Dyer, John J. Devore   +3 more
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Investigation and Analysis of International Roughness Index at National Freeway in Taiwan

Applied Mechanics and Materials, 2015
Taiwan's National Freeway plays an important role in Taiwan's transportation, it is convenient to go to anywhere through a series of north-south and east-west road networks, from this we can see, the freeway road quality is a project that always need to be concerned, and how to enhance the pavement quality of National Freeway will be the main subject ...
Jyh Dong Lin, Po Hsun Sung, Min Che Ho, Chien Jung Shen   +3 more
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