A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
COMPARATIVE STUDY OF PAVEMENT MAINTENANCE PRIORITIZATION BY HDM-4 MODEL AND PAVEMENT CONDITION INDEX IN CASE OF ADDIS ABABA ROADS
Road pavements require continuous maintenance and rehabilitation activities to prevent deterioration. Due to budget shortages, decision-makers must prioritize projects for maintenance and rehabilitation activities. Prioritization of maintenance projects in Addis Ababa has been done by public request, political aspects, and visual condition survey of road sections. But there isn’t a scientific way of analyzing and prioritizing the maintenance section of the roads for implementation. In this regard, the objective of this research is to set priorities of pavement maintenance sections for Addis Ababa city selected road sections based on PCI and HDM-4 model, then select appropriate prioritization techniques, and identify the optimum maintenance alternative based on maximum NPV value. For studying these, Ring Road along the Megenagna-Bulbula branch of Addis Ababa was chosen. The PCI ranking was done using a visual condition survey, which is a function of severity, quantity, and type of distress along pavement stretch, following standard ASTM D6433. The second-ranking method was based on an economic indicator in which NPV was calculated for each pavement section using the HDM-4 software. Hence, based on PCI method Section RR-06 with PCIs value 47.57 ranking the first priority and Section RR-02 with PCIs value 86.20 ranking the least priority, while HDM4 analysis result shows Section RR-05 with 420 million ETB net benefit ranking first priority and Section RR-01 with 29 million ETB net benefit least priority ranking for maintenance works. The finding implies ranking of section based on the PCI method is easy to understand but limited in the number of factors considered. It also ranks the pavements in the worst condition as the highest priority without regard to the return on the funds expended. Therefore, ranking based on HDM- 4 model allows a rational comparison among pavement sections to prioritize because it considers costs and benefits, inputs involve large details and economic analysis models; so the priority list evaluated thoroughly it can be considered as more accurate for implementation and is often better approach for prioritization ranking of the sections to maintenance works. As found from HDM-4 result, 50 mm thick overlay of asphalt concrete is to be optimum maintenance strategy for AA road sections, therefore AACRA maintenance management should use this maintenance treatment option.
COMPARATIVE STUDY OF PAVEMENT MAINTENANCE PRIORITIZATION BY HDM-4 MODEL AND PAVEMENT CONDITION INDEX IN CASE OF ADDIS ABABA ROADS
Road pavements require continuous maintenance and rehabilitation activities to prevent deterioration. Due to budget shortages, decision-makers must prioritize projects for maintenance and rehabilitation activities. Prioritization of maintenance projects in Addis Ababa has been done by public request, political aspects, and visual condition survey of road sections. But there isn’t a scientific way of analyzing and prioritizing the maintenance section of the roads for implementation. In this regard, the objective of this research is to set priorities of pavement maintenance sections for Addis Ababa city selected road sections based on PCI and HDM-4 model, then select appropriate prioritization techniques, and identify the optimum maintenance alternative based on maximum NPV value. For studying these, Ring Road along the Megenagna-Bulbula branch of Addis Ababa was chosen. The PCI ranking was done using a visual condition survey, which is a function of severity, quantity, and type of distress along pavement stretch, following standard ASTM D6433. The second-ranking method was based on an economic indicator in which NPV was calculated for each pavement section using the HDM-4 software. Hence, based on PCI method Section RR-06 with PCIs value 47.57 ranking the first priority and Section RR-02 with PCIs value 86.20 ranking the least priority, while HDM4 analysis result shows Section RR-05 with 420 million ETB net benefit ranking first priority and Section RR-01 with 29 million ETB net benefit least priority ranking for maintenance works. The finding implies ranking of section based on the PCI method is easy to understand but limited in the number of factors considered. It also ranks the pavements in the worst condition as the highest priority without regard to the return on the funds expended. Therefore, ranking based on HDM- 4 model allows a rational comparison among pavement sections to prioritize because it considers costs and benefits, inputs involve large details and economic analysis models; so the priority list evaluated thoroughly it can be considered as more accurate for implementation and is often better approach for prioritization ranking of the sections to maintenance works. As found from HDM-4 result, 50 mm thick overlay of asphalt concrete is to be optimum maintenance strategy for AA road sections, therefore AACRA maintenance management should use this maintenance treatment option.
COMPARATIVE STUDY OF PAVEMENT MAINTENANCE PRIORITIZATION BY HDM-4 MODEL AND PAVEMENT CONDITION INDEX IN CASE OF ADDIS ABABA ROADS
SULTAN DEMISSIE (author)
2020-08-08
doi:10.20372/nadre/19738
Theses
Electronic Resource
English
DDC:
690
Embassy, Addis Ababa, Ethiopia
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Evaluation of prioritization methods for effective pavement maintenance of urban roads
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