Results 211 to 220 of about 1,620 (256)

Factors Affecting Initial Roughness of Concrete Pavement

Journal of Performance of Constructed Facilities, 2007
Past studies have shown that initial pavement roughness greatly affects future pavement roughness and roughness progression rate. Initial pavement roughness is also an important input to the roughness prediction model in mechanistic-empirical design guide.
Haifang Wen, Cynthia Chen
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Stochastic modelling of pavement roughness

Proceedings of 28th Southeastern Symposium on System Theory, 2002
Pavement roughness is usually characterized by a one figure statistic of pavement profile data. This approach discards a rich body of useful pavement information in the pavement profile data. In this study, informative parametric models for pavement roughness are developed where pavement roughness is treated as a stochastic signal.
J.J. Zhu, null Wenli Zhu
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Evolution of Pavement Winter Roughness

Transportation Research Record: Journal of the Transportation Research Board, 2005
The functional service level of roads is quantified in terms of roughness. This parameter considers every road surface defect that causes passenger vehicle discomfort. Roughness is measured by a quality index, the international roughness index (IRI). Roughness gives an overall appreciation of road profile quality without, however, permitting a deeper ...
Nicolas Fradette, Guy Doré, Pascale Pierre, Serge Hébert   +3 more
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Pavement Roughness Measurement and Evaluation

1971
Vertical accelerations of a passenger in an automobile are automatically summed while traveling a section of road at 51.5 mph. A roughness index is obtained by summing the accelerations and dividing by the time elapsed during the test. The index is subjectively related to the riding quality of pavements.
Rizenbergs, Rolands L., Burchett, James L., Davis, Larry E.   +2 more
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Pavement Roughness In Kentucky

1982
Over two hundred pavement sections in Kentucky have been periodically measured for pavement roughness over a period of several years. This pavement service-life historical data can be used to assess quality of construction, pavement service-life, present and anticipated pavement condition.
Sharpe, Gary W., Cain, David H., Southgate, Herbert F., Havens, James H., Deen, Robert C.   +4 more
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Investigation of the effect of pavement roughness on crash rates for rigid pavement

Journal of Transportation Safety & Security, 2015
ABSTRACTPavement roughness may have a significant impact on traffic safety, but its effect on the overall safety problem needs to be studied and quantified. This article investigates the relationship between International Roughness Index (IRI) and crash rates by looking into traffic safety performance over time under changing pavement conditions ...
Ahmed Elghriany, Ping Yi, Peng Liu, Quan Yu   +3 more
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Pavement Roughness Studies

1962
Road roughness testing in Kentucky was first reported in 1949 (1). At that time, emphasis was placed on localized irregularities in pavement profiles detectable by a roller-type straight edge. The experience gained then pointed to the necessity for making a fast, continuous recording of characteristics of the road which would be more closely related to
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Rough Set Theory in Pavement Maintenance Decision

2009
The decision tree models based on pavement experts' experiences are usually used to derive pavement maintenance decisions. Because experiences are very difficult to obtain completely, some importance condition attributes in decision tree model are easily to be lost.
Ching-Tsung Hung, Jia-Ruey Chang, Jyh-Dong Lin, Gwo-Hshiung Tzeng   +3 more
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An alternative approach to pavement roughness evaluation

International Journal of Pavement Engineering, 2008
Although structural capacity seems to be the major concern of many pavement engineers, road users primarily judge the quality of a road based on its roughness or ride quality. Several parameters influence the ride quality of pavements as felt by the road users.
A. Loizos, C. Plati
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Modeling for pavement roughness using the ANFIS approach

Advances in Engineering Software, 2013
The term ''present serviceability'' was adopted to represent the momentary ability of pavement to serve traffic, and the performance of the pavement was represented by its serviceability history in conjunction with its load application history. Serviceability was found to be influenced by longitudinal and transverse profile as well as the extent of ...
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