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A comprehensive analysis on the pavement condition indices of freeways and the establishment of a pavement management system

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Journal of Traffic and Transportation Engineering(English Edition) 2016年第5期3卷 456-464页

作者： Jyh-Dong Lin Min-Che Ho Department of Civil Environment National Central University Department of Civil Environment Hiroshima University

In Taiwan, both the engineers and temporary employees serving in National Freeway Bureau are graduates of civil engineering. The lack of specialization in the pavement domains as students and the increasing financial requirement of pavement maintenance are hindering new engineers from further improving their knowledge on pavement. The present study aimed to improve the comfort index of national freeways. First, the inspection aspects of national freeways, such as road testing items and methods, are analyzed. Subsequently, the lack of previous literature on this subject prompted the researchers to organize relevant information pertaining to the comfort index and inspection processes of national freeways. The inspection and analysis of national freeways are beneficial for maintaining and enhancing the comfort and quality of national freeways. Moreover, the International Roughness Index is adopted to elucidate the differences exhibited at different speeds. In addition, the present study endeavored to determine skid number （SN） degradation equations to improve road traffic safety. First, a correlation analysis between SN and traffic flow, as well as between SN and climate data, was performed. Findings revealed an increased correlation between SN and traffic flow, while the correlation between SN and climate （temperature and rainfall） is less prevalent. Subsequently, traffic flow and climate were adopted as the factors for the SN degradation equations. The present study divided the traffic flow data of the entire national freeway system into five groups, enabling researchers to present individual SN degradation equations for various traffic flow conditions, thereby contributing to maintain and elevate the road traffic safety of national freeways.

关键词： National freeway Traffic flow Skid number Degradation equation pavement management system

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A review of top-down cracking in asphalt pavements:Causes, models, experimental tools and future challenges

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Journal of Traffic and Transportation Engineering(English Edition) 2020年第5期7卷 541-572页

作者： Francesco Canestrari Lorenzo Paolo Ingrassia Dipartimento di Ingegneria Civile Edile e Architettura(DICEA)Uniuersita Politecnica delle MarcheAncona 60131Italy

In the last decades,a new type of distress has been observed more and more frequently on asphalt *** distress,ascribable to fatigue failure,has been named top-down cracking(TDC) because it consists in longitudinal cracks that initiate on the pavement surface and then propagate downwards.A series of surveys recently carried out on Italian motorways highlighted that TDC can affect up to 20%-30% of the slow traffic ***,in order to achieve a better understanding of such distress,this paper reviews causes,models and experimental tools and highlights future challenges for *** literature review indicates that TDC can evolve on the pavement surface in three stages(i.e.,single crack,sister cracks,alligator cracking) and,below a certain depth,the cracks can form angles of 20°-40° with respect to the vertical *** though multiple factors contribute to TDC development,thick pavements are more likely to fail due to TDC induced by tire-pavement contact stresses,especially in the presence of open-graded friction courses(OGFCs).Moreover,in literature there are several TDC models based on mechanics(e.g.,fracture mechanics or continuum damage mechanics) which allow a rigorous study of crack initiation and *** challenges include the identification of a reliable and feasible test method,among those proposed in literature,to study the TDC performance of asphalt mixtures and the implementation of TDC in pavement management systems(PMSs) through the definition of criteria for TDC recognition in the field as well as for the rehabilitation depth ***,more research is needed for open-graded asphalt mixtures,which present critical drawbacks in terms of TDC.

关键词： Top-down cracking Flexible pavements Fatigue Cracking model Open-graded friction course pavement management system

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Discrete optimization models and methods for management systems of pavement maintenance and rehabilitation

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Journal of Shanghai University(English Edition) 2010年第3期14卷 217-222页

作者：何志强孙小玲 Department of Mathematics College of SciencesShanghai University School of management Fudan University

With the rapid development of highway construction and formation of the highway network in China,the man- agement of pavement maintenance and rehabilitation （MR） activities has become *** this paper,four discrete optimization models are proposed for different parties involved in the management system： government,highway agent,con- tractor and the common *** four optimal decision models are formulated as linear integer programming problems with binary decision *** objective function and constraints are based on the pavement performance and prediction model using the pavement condition index （PCI）.Numerical experiments are carried out with the data from a highway system in Sichuan Province which show the feasibility and effectiveness of the proposed models.

关键词： operations research optimization pavement management system linear integer programming models and nu- merical experiment

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Sustainable Maintenance of Rural Roads in Slovakia

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Journal of Civil Engineering and Architecture 2014年第4期8卷 486-491页

作者： Lubomir Pepucha Lubos Remek Department of Construction management Faculty of Civil Engineering University of Zilina Zilina 01008 Slovakia

systematic approach to the maintenance of rural road network is a very important issue from the viewpoint of public costs. Most countries developed custom PMS （pavement management systems） based on deterministic or probabilistic approach. The main goal is to ensure safety and continuity of road traffic on road network with low intensity and lower technical requirements. Article presents PMS used for Slovakia rural road network based on road construction diagnostics, traffic volume, climate factors and evaluation of maintenance works economics effectives by using of software tools like HDM-4 developed by World Bank. Local road administrators of rural road networks often lack the software equipment, most PMS, however effective, are often cumbersome, demanding in regard to energy, know-how and software equipment. The majority of local road administrators of rural road networks thus resort to non-effective reactive maintenance strategies. This article describes an easy to use method, based on predetermined maintenance repair and rehabilitation standards. A simple method, based on road user cost, is introduced that administrator can use to prepare a list of road section eligible for repair according to their repair priority.

关键词： pavement management system rural roads maintenance repair and rehabilitation.

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