Application of Pavement Condition Index (PCI) Methodology in Pavement Distress Evaluation and Maintenance Prioritization

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Mergi, Kamal Masoud
Mohamed, El Karim Mustafa
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: The study is concerned with the adaptation of visual condition survey methodology and implementation of Pavement Condition Index (PCI) in evaluation of pavement distress and prioritization of pavement maintenance of the Sudan paved road network. It is implemented on large part of the national road network (55% of the road network). The Sudan national highway has no enough budgets available for maintenance, and there is no standard priority method used to allocate the available pavement maintenance budget. The study aims to adapt assessment methodology and contribute in making better decisions with respect to expenditures of pavement maintenance in Sudan. In this research a comprehensive road visual condition survey for pavement distresses of the 60% of road network length (2780 km) is carried out and the study ranks the project according to its Index (PCI, excellent, very good, good, fair, bad, failed) and set initial priorities based on “the worst first” concept. The survey quantifies types, severity, density and percent of each distress on each road and determines its condition index, finally, a list of priorities and maintenance needs were generated. The study uses generated Polynomial equations instead of standard curves. The correlation between the data obtained from the standard curves and polynomials shows best fit condition (R2 more than 0.99).This paper presents the methodology and discusses the results of the visual condition survey.The visual condition survey methodology adopted to determine the pavement condition for Sudan paved road Network, based on ASTM Standard D6433, 2003. It provides a common method for describing distress on asphalt pavement in Sudan road network like cracks, bleeding, bump and sags, potholes, patching, raveling, swelling, etc…. It improves communication within pavement community, by fostering more uniform and consistent definitions of pavement distress. It increases the awareness of importance of road maintenance and rehabilitation and provides a tool for formulating rational bases for assessment of pavement condition and evaluation. Thus sets initial priorities for adopting roads project short list for rehabilitation in certain year. It can, therefore, play an important role in developing the strategic planning of road maintenance, and when detailed surveys were conducted, the inventory data can be used at project level.The outcomes of this study are development of road numbering system; adaptation of pavement condition survey methodology; evaluation of (2782 km) pavement condition on the national roads and prioritizing the maintenance of road sections using PCI and worst first concept.
Evaluation, Road Pavement, Identification System, Road Distress, Prioritization, Maintenance