The road pavement conditions affect safety and comfort, traffic and travel times, vehicles operating cost, and emission levels. In order to optimize the road pavement management and guarantee satisfactory mobility conditions for all road users, the Pavement Management System (PMS) is an effective tool for the road manager. An effective PMS requires the availability of pavement distress data, the possibility of data maintenance and updating, in order to evaluate the best maintenance program. In the last decade, many researches have been focused on pavement distress detection, using a huge variety of technological solutions for both data collection and information extraction and qualification. This paper presents a literature review of data collection systems and processing approach aimed at the pavement condition evaluation. Both commercial solutions and research approaches have been included. The main goal is to draw a framework of the actual existing solutions, considering them from a different point of view in order to identify the most suitable for further research and technical improvement, while also considering the automated and semi-automated emerging technologies. An important attempt is to evaluate the aptness of the data collection and extraction to the type of distress, considering the distress detection, classification, and quantification phases of the procedure.

Pavement Distress Detection Methods: A Review

The latest revision of the Austroads Pavement Design Guide was issued in 2001 as a final draft for public comment. Previous Guides have been issued in 1979, 1987 and 1992. The Guide represents a major revision of the 1992 edition as it incorporates substantial improvements that have resulted from Australian and overseas research into materials characterisation, traffic assessment, pavement performance studies and design methodology. This paper summarises the work undertaken to revise the guidelines for the design of flexible pavements. (a) For the covering entry of this conference, please see ITRD abstract no. E208402.

Guidelines for the design of flexible pavements for australia

The Performance of Asphalt Mixtures Modified with Lignin Fiber and Glass Fiber: a Review

This paper presents a new technique to estimate the transition probabilities used in the Markovian-based pavement performance prediction models. The proposed technique is based on the ‘back-calculation’ of the discrete-time Markov model using only two consecutive cycles of pavement distress assessment. The transition probabilities, representing the pavement deterioration rates, are the main elements of the Markov model used in predicting future pavement conditions. The paper also presents a simplified procedure for evaluating the pavement state of distress using the two major pavement defect groups, namely cracking and deformation. These two defect groups are to be identified and evaluated for pavement sections using visual inspection and simple linear measurements. The extent of these two major defect groups is measured using the defected pavement areas (or lengths) and the defect severity is measured based on the average crack width and average deformation depth. A case study is presented to demonstrate...

/pdf/back-calculation-of-transition-probabilities-for-markovian-53dug51g8m.pdf

Back-calculation of transition probabilities for Markovian-based pavement performance prediction models

Pavement asset management systems and technologies: A review

Development of Overall Pavement Condition Index for Urban Road Network

Rutting in Flexible Pavement: An Approach of Evaluation with Accelerated Pavement Testing Facility

ABSTRACT Asphalt binder modification is one of the approaches taken to improve pavement performance. In addition it may also be improved through the addition of fibers to Asphalt mix that enhances material strength and fatigue characteristics while adding ductility. Due to their inherent compatibility with Asphalt concrete and excellent mechanical properties, fibers offer an excellent potential for modification of Asphalt concrete mix. To investigate the behavior of Fiber Modified Asphalt Concrete Mixes (FMACM), a preliminary study has been done to determine the feasibility of modifying the behavior of a Asphalt Concrete (AC) mixture through the use of Glass fiber and Polyester fiber. The purpose of this study was to identify and understand the factor that is responsible for improving the behavior of FMACM. Asphalt concrete samples were prepared and tested in the laboratory to evaluate the various mixture characteristics. The conclusions drawn from the study on testing of fiber-modified mixes are that fiber modified Asphalt mixtures have shown increased stiffness and resistance to permanent deformation. Fatigue characteristics of the mixtures were also improved. Fibers used in the study were of high tensile strength therefore test results of FMACM have shown higher indirect tensile strength and improved skid resistance for paving applications.

/pdf/performance-characteristics-of-fiber-modified-asphalt-2egy6pp26x.pdf

Performance Characteristics of Fiber Modified Asphalt Concrete Mixes

India is developing her national highway network through widening and rehabilitation of existing highways along with the construction of expressways in different phases, since 1999. Unprecedented growth of road traffic, high variations in pavement temperature and need of long lasting pavements have increased the use of modified bitumen specifically in wearing courses of many flexible pavement road sections of national highway network in entire country. Crumb rubber-modified bitumen (CRMB) and polymer-modified bitumen (PMB) of different grades are mostly used modified binders under different climatic and environmental conditions. During the design life, bituminous road sections show different rates of initiation and propagation of distresses under varying traffic and climatic conditions. In this study, an effort has been made to calibrate the internationally recognised Highway Development & Management (HDM-4) road deterioration models for the selected flexible pavement sections over time with traff...

Calibration of HDM-4 models for Indian conditions of flexible pavement having modified bitumen in wearing course

The concept of ”serviceability” of roads and its evolution through time is widely accepted by pavement engineers and professionals as a way to evaluate road quality and conditions. Both the Present Serviceability Index (PSI) and International Roughness Index (IRI) can be used as indicators of road riding quality and serviceability. The objective of the present study was to develop realistic models for estimating PSI for asphalt pavement sections located in the urban city of Noida, near Delhi, the capital of India. The PSI model was developed as a function of the pavement age. An attempt was made to calibrate the American Association of State Highway & Transportation Officials (AASHTO) equation for PSI and determine the suitability of this equation in Indian pavement conditions for selected urban roads. The developed models were also validated. Based on the developed PSI model, the maintenance alternatives have been suggested for the urban road sections in the study area.

http://www.ijprt.org.tw/reader/pdf.php?id=279

Devesh Tiwari

Papers

Development of Overall Pavement Condition Index for Urban Road Network

Rutting in Flexible Pavement: An Approach of Evaluation with Accelerated Pavement Testing Facility

Performance Characteristics of Fiber Modified Asphalt Concrete Mixes

Calibration of HDM-4 models for Indian conditions of flexible pavement having modified bitumen in wearing course

Modeling the Pavement Serviceability Index for Urban Roads in Noida