Predication of Pavement Performance for Highway Sections with Special Geometric Features | ||||
The International Conference on Civil and Architecture Engineering | ||||
Article 48, Volume 9, 9th International Conference on Civil and Architecture Engineering, May 2012, Page 1-11 PDF (281.14 K) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/iccae.2012.44378 | ||||
View on SCiNiTO | ||||
Authors | ||||
Hassan Salama1; Nasser Gonah2; Mahmoud Solyman3; Mohamed El Refaey4 | ||||
1Associate professor., Civil & Environmental Engineering Department, Al Azhar University, Egypt. | ||||
2Ph. D. Candidate., Civil & Environmental Engineering Department, Al Azhar University, Egypt. | ||||
3Assistant professor., Construction Engineering Department, Zagazig University, Egypt. | ||||
4Assistant professor., Civil & Environmental Engineering Department, Al Azhar University, Egypt. | ||||
Abstract | ||||
Abstract The current state-of-the-practice for pavement design only accounts for traffic load application without considering the speed and highway geometry as design criterion. This paper investigates the effect of geometric design elements including horizontal curves, vertical gradients and U-turns on pavement performance at different traffic characteristics and pavement structures. The effects of theses parameters on Pavement Condition Index (PCI) and International Roughness Index (IRI) were investigated using simple, multiple, and stepwise linear regression to develop prediction models for special geometric sections. In this study, field data were collected for surface pavement distresses, for sections with special geometric features, varied traffic characteristics, and different pavement structures. Comparison between the pavement conditions of sections with special geometric features and those of their reference straight road sections was performed. The results showed significant difference between PCI of special geometric sections and their reference sections. So, the geometry factor needs to be considered in structural design of pavements. This paper also showed that speed is one of the most important factors influencing pavement deterioration especially at upgrade sections and horizontal curves. Prediction models were built to forecast the pavement conditions for sections with vertical gradients and horizontal curves. | ||||
Keywords | ||||
Special Geometric Sections; Pavement Conditions; International Roughness Index; Regression Analysis | ||||
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