Download or read book Pavement Condition Index Remaining Service Life written by GY. Baladi and published by . This book was released on 1991 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The issues and the setting of common engineering criteria to establish threshold values for a better calculation of the pavement distress indices and Remaining Service Life (RSL) are presented. Benefits derived from the use of RSL such as simplifying the Pavement Management System (PMS), computational procedures, improving communication between the various PMS users, and increasing the PMS capability are also included. Within the framework of a PMS, most State Highway Agencies (SHAs) collect pavement condition data to calculate pavement distress indices. Because pavement condition data is the basis for all PMS analysis, the values of the pavement indices are typically prioritized and the highest priority is placed on eliminating most deficiencies. Examination of this effort has indicated that the method is deficient and that the RSL is a better pavement condition index.

Download or read book Pavement Management Implementation written by Frank B. Holt and published by ASTM International. This book was released on 1991 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Prediction of Remaining Service Life of Pavements written by Chaitanya Kumar Balla and published by . This book was released on 2010 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pavement management is a process that helps to maintain a pavement network in a safe and serviceable condition in a cost effective manner. A key component of an effective pavement management system is its ability to predict the remaining service life of pavements. Remaining service life of pavements can be predicted using the present pavement condition and the latest rehabilitation action performed on that particular pavement. Survival curves are often developed to obtain remaining service life of a pavement family. The objectives of this study are to determine the average service life of pavements and to predict their remaining service life. Remaining Service Life is defined as the projected number of years until rehabilitation is required. The pavement condition data in the form of Pavement Condition Rating (PCR) were used to develop Kaplan-Meier survival curves for different PCR thresholds. PCR 60 was considered as the terminal condition and the average service life of pavement network was calculated as the area under PCR 60 survival curve. Derived performance curves for all the survival probabilities were developed between pavement age and PCR using the Weibull approximation of the Kaplan-Meier survival curves. Derived performance curves were employed to determine the remaining service life of individual pavements based on current age and PCR. PCR curves were also developed for individual PCR thresholds between RSL and pavement age by using the Weibull approximation of the Kaplan-Meier survival curves to better understand the relationship between RSL, PCR and pavement age. Average service life of the pavement network and remaining service life of individual pavements obtained from this study can be used to assist in pavement rehabilitation decision making and budget allocation.

Download or read book Pavement Service Life Estimation and Condition Prediction written by Jianxiong Yu and published by . This book was released on 2005 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Remaining service life estimation and pavement condition prediction are two essential functions of Pavement Management Systems. Survival curves are often developed to obtain remaining life of a pavement family at network level. Regression equations are often developed to predict future pavement condition at project level. The two objectives of this study are: (1) To develop the Cox Proportional Hazard model to analyze the effects of influential factors on pavement remaining life; (2) To develop linear mixed effects prediction model to improve the condition prediction accuracy for individual pavements. In this study, by specifying pavement condition rating (PCR) of 70 as the terminal pavement status, survival curves were developed based on historical PCR data using Cox Proportional Hazards method. Further, the estimated service lives of pavements were obtained from these survival curves. As an example, the survival data of asphalt overlays on flexible pavements in Ohio were analyzed for this study. The effects of influential factors such as structure thickness, climate, traffic loading, and pavement conditions prior to repair on pavement service life, were assessed. The results show that the Cox Proportional Hazards model is applicable in estimating the effects of influential factors on pavement service life. The service life obtained from this study can be used to assist in pavement rehabilitation decision-making, overlay design, and budget allocation. Condition prediction of individual pavement is usually required in project-level management and is often based on adjusting corresponding pavement family deterioration trend. This study proposes using the Linear Mixed Effects Model (LMEM) method to predict future conditions of a specific pavement section by a weighted combination of the deterioration trends of the family average and that of the specific pavement. The weights are determined by the number of historical condition measurements available and the variations of the measured historical conditions of the specific pavement. The results of the LMEM showed significantly better accuracy in predicting specific pavement conditions compared with two commonly used adjustment methods, which use the latest condition measurement to adjust family model for individual pavement. The findings in this study show that the LMEM is useful for project level pavement condition prediction.

Download or read book Pavement Management for Airports Roads and Parking Lots written by M.Y. Shahin and published by Springer. This book was released on 1994-08-31 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emphasizing sound, cost-effective management rather than emergency repairs, this comprehensive volume offers practical guidelines on evaluating and managing pavements for airports, roads, and parking lots. The author focuses on the implementation and maintenance of successful management strategies for both network and project levels, with repair techniques also described . Detailed chapters: 1) outline step-by-step procedures for project and network level pavement management 2) illustrate effective cost analysis and budget planning for pavement maintenance 3) guide the reader in the selection and use of non-destructive deflection, roughness measurement, and friction measurement equipment 4) present state-of-the-art pavement rehabilitation and condition prediction techniques 5) demonstrates the Pavement Condition Index (PCI) procedure for airfields and surfaced and unsurfaced roads. Extensive appendices serve as a field manual for identifying all types of pavement distress and their causes, and hundred of photographs facilitate accurate pavement evaluation. Civil and pavement engineers will find complete information on pavement inspection, evaluation, and management in this indispensable reference.

Download or read book Pavement Management Methodologies to Select Projects and Recommend Preservation Treatments written by Kathryn A. Zimmerman and published by Transportation Research Board. This book was released on 1995 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: This synthesis will be of interest to highway administrators; pavement management system (PMS), maintenance, and computer engineers; and technologists involved with data collection and computer programming for the purposes of a PMS. This synthesis describes the state of the practice with respect to pavement management methodologies to select projects and recommend preservation treatments. This report of the Transportation Research Board also describes the predominant pavement management methodologies being used by U.S. state and Canadian provincial transportation agencies; provides a general description of each methodology; and summarizes the requirements, benefits, hindrances, and constraints associated with each. It includes a review of domestic literature and a survey of current practices in North America. In addition, case studies are included to illustrate the use of these methodologies within transportation agencies. Operational and soon-to-be implemented technologies are also discussed, and an extensive bibliography is provided for further reference.

Download or read book Developing Cost effective Pavement Maintenance and Rehabilitation Schedules written by Gulfam Jannat and published by . This book was released on 2017 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pavement Maintenance and Rehabilitation (M&R) are the most critical and expensive components of infrastructure asset management. Increasing traffic load, climate change and resource limitations for road maintenance accelerate pavement deterioration and eventually increase the need for future maintenance treatments. Consequently, pavement management programs are increasingly complex. The complexities are attributed to the precise assessment process of the overall pavement condition, realistic distress prediction and identification of cost-effective M&R schedules. Cost-effective road M&R practices are only possible when the evaluation of pavement condition is precise, pavement deterioration models are accurate, and resources must also be available at the right time. In a Pavement Management System (PMS), feasible M&R treatments are identified at the end of each branch of the decision trees. The decision trees are based on empirical relationships of the pavement performance index. Moreover, the predicted improvements in pavement performance for any treatment are set based on engineering experiences. Furthermore, the remaining service life of the pavement is estimated from the predicted deterioration of the overall condition. The future deterioration of the overall condition is estimated based on the initial condition and by considering only the effect of age notwithstanding the effect of traffic or materials. In assessing the overall condition of the pavement, this research overcomes the limitations of engineering judgment by incorporating a Mechanistic-Empirical (M-E) approach and estimating the improvement in performance for specific treatment types. It also considers the effect of traffic and materials on pavement performance to precisely predict its future deterioration and subsequent remaining service life. The objective of this research is to develop cost-effective pavement M&R schedules by incorporating (a) the M-E approach into the overall condition index and (b) the estimate of performance indices by considering the factors affecting pavement performance. The research objective will be accomplished by (i) incorporating variability analysis of existing performance evaluation practices and maintenance decisions of pavement, (ii) investigating estimates of existing performance indices, (iii) incorporating the M-E approach: sensitivity analysis, prediction, comparison and verification, (iv) estimating the deterioration model based on traffic characteristics and material types, and (v) identifying cost-effective M&R treatment options through Life Cycle Cost Analysis (LCCA). This study uses the pavement performance data of Ontario highways recorded in the Ministry of Transportation (MTO) pavement database. Precise assessment of pavement condition is a significant part in achieving the research goal. In a PMS, an accurate location reference system is necessary for managing pavement evaluations and maintenance. The length of the pavement section selected for evaluation may have a significant impact on the assessment irrespective of the type of performance indices. In Ontario, the highway section lengths range from 50m to 50,000m. For this reason, a variability in performance evaluation is investigated due to changes in section length. This study considers rut depth, Pavement Condition Index (PCI), and International Roughness Index (IRI) as performance indices. The distributions of these indices are compared by the following groupings of section lengths: 50m, 500m, 1,000m and 10,000m. The variations of performance assessments due to changing section lengths are investigated based on their impact on maintenance decisions. A Monte Carlo simulation is carried out by varying section lengths to estimate probabilities of maintenance work requirements. Results of such empirical investigations reveal that most of the longer sections are evaluated with low rut depth and the shorter sections are evaluated with high rut depth. This Monte Carlo simulation also reveals that 50m sections have a higher probability of maintenance requirements than 500m sections. The method of estimating performance indices is also investigated to identify the requirement of improvement in estimation of the prediction models. Generally, in a PMS, the prediction models of Key Performance Indicators (KPIs) are estimated by using the Ordinary Least Square (OLS) approach. However, the OLS approach can be inefficient if unobserved factors influencing individual KPIs are correlated with each other. For this reason, regression models for KPI predictions are estimated by using an approach called the 'Seemingly Unrelated Regression (SUR)' method. The M-E approach is used in this study to predict the future distresses by employing mechanistic-empirical models to analyze the impact of traffic, climate, materials and pavement structure. The Mechanistic-Empirical Pavement Design Guide (MEPDG) software uses a three-level hierarchical input to predict performance in terms of IRI, permanent deformation (rut depth), total cracking (reflective and alligator), asphalt concrete (AC) thermal fracture, AC bottom-up fatigue cracking and AC top-down fatigue cracking. However, these inputs have different levels of accuracy, which may have a significant impact on performance prediction. It would be ineffective to put effort for obtaining accuracy at Level 1 for all inputs. For this reason, a sensitivity analysis is carried out based on an experimental design to identify the effect of the accuracy level of inputs on the distresses. Following this, a local sensitivity analysis is carried out to identify the main effect of input variables. Interaction effects are also analyzed based on a random combination of the inputs. Since the deterioration of pavement is affected by site-specific traffic, local climate and properties of materials, these variables are carefully considered during the development of the pavement deterioration model to assess overall pavement conditions. The prediction model is developed by using a regression approach considering distresses of the M-E approach. In this study, the deterioration model is estimated for three groups of Annual Average Daily Traffic (AADT) to recognize their individual impact along with properties of materials. The time required for maintenance is also estimated for these categories. The investigations reveal that the expected time to maintenance for overlay with Dense Friction Course (DFC) and Superpave mixes is higher than other Hot Laid (HL) asphalt layers. This will help pavement designers and managers to make informed decisions. The probability of failure is also investigated by a probabilistic approach. With the increasing trend towards M&R of existing pavements, it is essential to make cost-effective use of the M&R budget. As such, identification of associated cost-effective M&R treatments is not always simple in most PMS. For this reason, a LCCA is carried out for alternate pavement treatments using the deterioration model based on traffic levels and material types. Comparing the Net Present Worth (NPW) value of alternative treatment options reveals that the overlay of pavement with DFC is the most cost-effective choice in the case of higher AADT. On the other hand, overlay with Hot Laid-1 (HL-1) is a cost-effective treatment option for highway sections with lower AADT. Although the results are related to the Ontario highway system, this can also be applied elsewhere with similar conditions. The outcome of the empirical investigations will result in the adoption of efficient road M&R programs for highways based on realistic performance predictions, which have significant impact on infrastructure asset management.

Download or read book Quality Management of Pavement Condition Data Collection written by Gerardo W. Flintsch and published by Transportation Research Board. This book was released on 2009 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reformulated pavement remaining service life framework written by Gary E. Elkins and published by . This book was released on 2013 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many important decisions are necessary in order to effectively provide and manage a pavement network. At the heart of this process is the prediction of needed future construction events. One approach to providing a single numeric on the condition of a pavement network is the use of pavement remaining service life (RSL). However, many issues exist with the current RSL terminology and resulting numeric that complicate proper interpretation, interagency data exchange, and use. A major source of uncertainty in the current RSL definition is the use of the term "life" to represent multiple points in the pavement construction history. The recommended path to consistency involves adopting terminology of time remaining until a defined construction treatment is required (i.e., RSL is replaced by remaining service interval (RSI)). The term "RSI" has the ability to unify the outcome of different approaches to determine needs by focusing on when and what treatments are needed and the service interruption created. This report presents the framework for replacing the current RSL terminology with one based on more exact construction event terms. A companion document (FHWA-HRT-13-050) provides step-by-step guidelines for implementing the RSI terminology.

Download or read book Pavement remaining service interval implementation guidelines written by Gary Eugene Elkins and published by . This book was released on 2013 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gravel Roads written by Ken Skorseth and published by . This book was released on 2000 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this manual is to provide clear and helpful information for maintaining gravel roads. Very little technical help is available to small agencies that are responsible for managing these roads. Gravel road maintenance has traditionally been "more of an art than a science" and very few formal standards exist. This manual contains guidelines to help answer the questions that arise concerning gravel road maintenance such as: What is enough surface crown? What is too much? What causes corrugation? The information is as nontechnical as possible without sacrificing clear guidelines and instructions on how to do the job right.

Download or read book Common Airport Pavement Maintenance Practices written by Jaroslav J. Hajek and published by Transportation Research Board. This book was released on 2011 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's Airport Cooperative Research Program (ACRP) Synthesis 22: Common Airport Pavement Maintenance Practices explores how airports implement a pavement maintenance management program, including inspecting and tracking pavement condition, scheduling maintenance, identifying necessary funds, and treating distresses in asphalt and concrete pavements.

Download or read book AASHTO Guide for Design of Pavement Structures 1993 written by American Association of State Highway and Transportation Officials and published by AASHTO. This book was released on 1993 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design related project level pavement management - Economic evaluation of alternative pavement design strategies - Reliability / - Pavement design procedures for new construction or reconstruction : Design requirements - Highway pavement structural design - Low-volume road design / - Pavement design procedures for rehabilitation of existing pavements : Rehabilitation concepts - Guides for field data collection - Rehabilitation methods other than overlay - Rehabilitation methods with overlays / - Mechanistic-empirical design procedures.

Download or read book Development of a Pavement Condition Index for Roads and Streets written by Mohamed Y. Shahin and published by . This book was released on 1978 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the preliminary development of a pavement condition index (PCI) for rating jointed concrete and asphalt-surfaced roads and streets. The PCI, which measures pavement structural integrity and surface operational conditions, is calculated by measuring pavement distress types, severities, and densities obtained during pavement inspection. The PCI procedure presented in this report will be further field-tested and verified. (Author).

Download or read book Application and Validation of Remaining Service Interval Framework for Pavements written by Gonzalo R. Rada and published by . This book was released on 2016 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: The pavement remaining service interval (RSI) terminology was developed to remove confusion caused by the multitude of meanings assigned to the various forms of pavement remaining service life (RSL). The RSI concept considers the complete maintenance and rehabilitation (M&R) activity of the pavement system and does not simply consider the end of life as promulgated by the RSL philosophy. The goal of this project was to demonstrate and further develop the application of the pavement RSI concept using real data from two State pavement management systems and the Highway Performance Monitoring System 2010+ dataset. Project-level analysis addressed gaps in the network- and strategic-level analyses. The results from the validation efforts support the conclusion that the RSI represents a valid approach to determining and communicating future M&R needs of a pavement instead of defining pavement life using a single number as in RSL. Those results also show that RSL is essentially not related to the time until the next pavement treatment in an optimal strategy.

Download or read book Analysis of Pavement Remaining Service Life on the Basis of Dynamic Deflections Measurement Considering the Temperature in Asphalt Pavement Layers written by Xiaorui Zhang and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pavement Service Life written by Wisconsin. Department of Transportation and published by . This book was released on 2004 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: We surveyed AASHTO Research Advisory Committee members around the country. Survey responses indicated that service life typically is understood as a measure in years from construction to first rehabilitation or overlay, and as no verifiable actual (rather than estimated) service life tracking has been conducted for periods of 20 or more years, this necessarily entails calculations and estimates. Occasionally service life may be measured merely in terms of performance indicators or condition indices, but rarely in traffic loading terms such as ESALs or any other measure. In this report, we will look first at the survey results, then at specific states, starting with those with climates similar to Wisconsin, and moving then to other states. We also look briefly at Australian research and at work reported by the American Concrete Pavement Association and the Asphalt Pavement Alliance. In each of these sections we highlight definitions of service life and the pavement type categories to which the agency applies the term.