Results 291 to 300 of about 261,425 (336)

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
openaire   +1 more source

International Roughness Index Prediction of Flexible Pavements Using Neural Networks

Journal of Transportation Engineering, Part B: Pavements, 2019
AbstractInternational roughness index (IRI) is a widely-accepted parameter that indicates pavement performance and ride quality.
M. I. Hossain, L. S. P. Gopisetti, M. S. Miah   +2 more
openaire   +1 more source

Feasibility of Modernizing the Acceptable International Roughness Index Value

Transportation Research Record: Journal of the Transportation Research Board
The U.S. National Highway System has set a standard for acceptable pavement roughness, measured by the international roughness index (IRI) at less than 2.68 m/km (170 in./mi). This value corresponds to a present serviceability rating (PSR) of 2.5, where half of the highway drivers perceive the pavement ride quality as unacceptable with a repair need ...
Yoojung Yoon, Shirin Hassan
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Using the International Roughness Index for Profilograph Trace Reduction

Transportation Research Record: Journal of the Transportation Research Board, 1996
Current Louisiana acceptance specifications for 100 percent payment require Profile Indexes (PIs) completed pavement surface to as low as 3.0 in./mi for flexible pavements and 6.0 in./mi for rigid pavements. These acceptance specifications are currently among the most stringent in the United States. Requiring an acceptance PI value of less than 7.0 in.
openaire   +1 more source

Gray System Model for Estimating the Pavement International Roughness Index

Journal of Performance of Constructed Facilities, 2005
The international roughness index (IRI) is a measurement of pavement roughness that is widely accepted for evaluating pavement serviceability, especially its riding quality. Generally, as the age of pavement increases, its condition deteriorates and its IRI value increases.
Yi Jiang, Shuo Li
openaire   +1 more source

Developing Spectrum-Based Models for International Roughness Index and Present Serviceability Index

Journal of Transportation Engineering, 2001
This paper presents a theoretical model for determining international roughness index (IRI) and present serviceability index (PSI) in term of power spectral density (PSD) roughness. Frequency response functions of quarter-car model and CHOLE-type profilometer are obtained by means of stochastic process theory.
openaire   +1 more source

Relation between power spectral density of road roughness and international roughness index and its application

International Journal of Vehicle Design, 2018
To address issues on the relation between the power spectral density (PSD) of road roughness and international roughness index (IRI), a simple method based on stochastic mathematics is used to derive the relation between the IRI and relative vertical velocity of sprung and unsprung masses of a quarter-car vibration system.
Jie Li, Zhenwei Zhang, Xiong Gao, Peide Wang, Jiantong Li   +4 more
openaire   +1 more source

Effects of international roughness index on vehicle emissions

International Journal of Vehicle Systems Modelling and Testing, 2021
Priscilla Oliveira Azevedo, Ernesto Ferreira Nobre Junior, Arielle Elias Arantes   +2 more
openaire   +1 more source

International Roughness Index prediction for flexible pavements using novel machine learning techniques

Engineering applications of artificial intelligence, 2023
Mosbeh R. Kaloop, S. El-Badawy, J. Hu, R. A. El-Hakim   +3 more
semanticscholar   +1 more source

Performance of Soft Computing Technique in Predicting the Pavement International Roughness Index: Case Study

International Journal of Pavement Research and Technology, 2023
A. Ali, A. Hussein, Usama Heneash
semanticscholar   +1 more source