Download or read book Development of New Pavement Design Equivalent Single Axle Load ESAL written by Sirous H. Alavi and published by . This book was released on 1999 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: For a given road segment, accurate estimates of current and projected traffic [in terms of Equivalent Single Axle Loads (ESALs)] can result in significant cost savings, either from the standpoint of initial construction cost or future maintenance and rehabilitation cost. The primary objective of this project is to prepare a new ESAL design table for Arizona's highway network. This new table is based on analysis of current traffic data collection procedures, traffic forecasting methodology, and ESAL development procedures, including the assignment of traffic ESAL levels to the various highway segments.

Download or read book Development of Truck Equivalent Single axle Load ESAL Factors Based on Weigh in motion Data for Pavement Design in Virginia written by Bryan C. Smith and published by . This book was released on 2009 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Virginia Department of Transportation's (VDOT's) current pavement design procedure is based on the 1993 AASHTO Guide for Design of Pavement Structures. In this procedure, a required structural capacity is calculated as a function of the anticipated service life, the serviceability of the pavement, and the number of equivalent loads applied. The concept of equivalent applied loads allows for the pavement designer to account for the damage caused by loads of varying magnitudes and axle configurations. Although pavement damage can be expressed per axle, expressing the damage in terms of the average amount of damage caused by a particular vehicle is more convenient. This is referred to as a truck factor, which is the average number of equivalent single-axle load (ESAL) applications per vehicle. VDOT's current pavement design procedure subdivides truck traffic into two categories, i.e., single-unit trucks and combination trucks, and was based on studies performed in the early 1990s. Over the last few years, VDOT has installed weigh-in-motion (WIM) devices at 15 locations around the state that measure the loads actually applied by vehicles in the travel lanes. These WIM stations allow for continuous data collection that was previously not available and therefore can provide a better representation of actual traffic loading. This study developed updated truck ESAL factors based on WIM data from June 2007 through May 2008 in Virginia. These factors were found to be 0.46 for single-unit trucks and 1.05 for combination trucks using flexible pavements and 0.59 for single-unit trucks and 1.59 for combination trucks using rigid pavements. The updated truck ESAL factors determined in this study should be incorporated into VDOT's pavement design procedure. Using the updated truck ESAL factors recommended in this study will allow a more optimal pavement design that more accurately reflects the traffic loading on roadways in Virginia.

Download or read book Estimating and Forecasting Equivalent Single Axle Loadings for Pavement Design written by Bruce Aunet and published by . This book was released on 1989 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Determination of Equivalent Single Axle Load ESAL Factor for Georgia Pavement Design written by Sonny Kim and published by . This book was released on 2021 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analysis and Determination of Axle Load Spectra and Traffic Input for the Mechanistic Empirical Pavement Design Guide written by Yi Jiang and published by Purdue University Press. This book was released on 2008-03-01 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: The values of equivalent single axle loads (ESAL) have been used to represent the vehicle loads in pavement design. To improve the pavement design procedures, a new method, called the Mechanistic-Empirical Pavement Design Guide (MEPDG), has been developed to use the axle load spectra to represent the vehicle loads in pavement design. These spectra represent the percentage of the total axle applications within each load interval for single, tandem, tridem, and quad axles. Using axle load spectra as the traffic input, the MEPDG method is able to analyze the impacts of varying traffic loads on pavement and provide an optimal pavement structure design. In addition, the new method can be used to analyze the effects of materials and the impacts of seasons, to compare rehabilitation strategies, and to perform forensic analyses of pavement conditions. The MEPDG utilizes mechanistic-empirical approaches to realistically characterize inservice pavements and allows the full integration of vehicular traffic loadings, climatic features, soil characteristics, and paving materials properties into the detailed analysis of pavement structural behaviors and the resulting pavement performance. In order to provide the traffic data input required by the MEPDG, the Indiana Department of Transportation (INDOT) made an effort to obtain truck traffic information from the traffic data collected through weigh-in-motion (WIM) stations. This study was conducted to create the truck traffic spectra and other traffic inputs for INDOT to implement the new pavement design method. Furthermore, the INDOT AADT data were used in this study to analyze the spatial distributions of the traffic volumes in Indiana and to obtain the spatial distributions of traffic volumes.

Download or read book Development of Flexible Pavement Design Parameters for Use with the 1993 AASHTO Pavement Design Guidelines written by and published by . This book was released on 2003 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Adjustment of Equivalent Single Axle Load for Pavement Design by Use of Weigh in motion Data written by Faria Emamian and published by . This book was released on 1992 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mechanistic empirical Pavement Design Guide written by American Association of State Highway and Transportation Officials and published by AASHTO. This book was released on 2008 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effects of Truck Volume Mix and Weight Distribution on Pavement Design written by David A. Friedrichs and published by . This book was released on 1988 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Traffic Load Forecasting for Pavement Design written by Anthony J. Vlatas and published by . This book was released on 1991 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of Site specific ESAL written by Sirous H. Alavi and published by . This book was released on 2002 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was approved by the CDOT's Research Implementation Committee as a high priority research with the goal of improving the accuracy of the existing and forecasted traffic loads of CDOT's highway network. The overall scope of this project involved examination of those resources directly related to the current statewide ESAL classification system and the generation of this final report discussing the research and analysis conducted and recommendation of procedures required for CDOT to develop and implement a more site-specific ESAL classification system. In this study Nichols Consulting Engineers (NCE) analyzed all available CDOT permanent and portable weigh-in-motion (WIM) data.

Download or read book Development of Truck Equivalency Factors and Axle Load Spectra for Pavement Design written by Sylena Michelle Tisdale and published by . This book was released on 2003 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Improved Consideration of Multiple axle Loads in the Structural Design of Flexible Pavements written by Michael Alexander Moffatt and published by . This book was released on 2015 with total page 854 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research demonstrates that the observed performance of pavement materials subjected to multiple-axle loading can be used to improve the way flexible pavement design procedures consider the damage caused by different axle group and load combinations. Australian flexible pavement design procedures are used as the basis for considering this improvement.Fundamental to the Australian design procedures are established equal damage loads for each type of multiple-axle group. This study determined that the derivation of these equal damage loads was more heavily influenced by numerical calculations based upon assumed behaviour than on experimental data. It was also found that international design methods are similarly based upon assumed response-to-load behaviour of modelled pavement structures. In contrast, this thesis utilises performance data in order to determine the relative damage caused by different axle group-types and loads. In new work, the effects of multiple-axle loads on three pavement material types were examined.Accelerated pavement testing was used to assess the deformation of unbound granular pavements with a thin bituminous surfacing. It was determined that a 180 kN triaxle group caused 0.8 to 1.0 times the damage caused by a 80 kN single axle. Assuming a load-damage exponent of 4, the results confirmed that interaction between the axles of a multiple-axle group did not affect the deformation damage caused to the pavements.New consideration of an existing laboratory-based asphalt fatigue damage model - developed by others - demonstrated that there was no damaging or ameliorating effect of grouping strain pulses used to simulate multiple-axle groups.A similar laboratory-based study was undertaken to examine the effects of grouping load pulses on the flexural fatigue performance of a cemented material. Analysis of the resultant data demonstrated that damage was not affected by grouping pulses of equal load.Parametric three-dimensional finite element method and layer linear-elastic analyses indicted that the pavement structure plays a significant role in determining loads for multiple-axle groups that cause the same asphalt and cemented material fatigue damage as a Standard Axle load. Consequently, the summed-peaks pavement design model for determining the damage to a bound material resulting from an axle group with specific load was proposed.An improved design procedure based upon this model was proposed. The procedure specifically calculates the pavement damage resulting from each axle grouping type and each load within a traffic load distribution. An examination of the implications of design outcomes in using this improved procedure determined that reductions in both asphalt and cemented material thicknesses of up to 50 mm would result. These differences are significant, and represent improved material and construction cost savings - potentially of the order of A$50 million a year.A determination of the overall reliability of pavements that are constructed in accordance with the improved procedure is needed to fully implement the improved procedure. Future work should also consider the use of the summed-peaks model with the subgrade compressive strains used in current mechanistic design.

Download or read book Infrastructure Sustainability Through New Developments in Material Design Construction Maintenance and Testing of Pavements written by Anand Tapase and published by Springer Nature. This book was released on 2021-07-10 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book includes a collection of research and practical papers aiming with key priority for improving the infrastructural sustainability for our well-being and day-to-day lives through novel developments. The united efforts through new developments in material, design, construction, maintenance, and testing of pavements from all over the world are taken under one umbrella. Topics include issues related to civil infrastructure such as the use of construction waste, recycled aggregates, service life prediction of pavements, mechanical behavior of SMA, control measures of ready mixed concrete, determination of landslide high-risk areas, Simulation of rock hydraulics in rock joint, sustainable planning for provision of basic infrastructural facilities in rural areas. It is anticipated that this book will support decisions regarding the optimal management and maintenance of civil infrastructures to support a more resilient and sustainable environment for infrastructure users.

Download or read book An Evalation of Flexible Pavement Design Mehtods written by Idaho. Department of Highways. Research Division and published by . This book was released on 1964 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: From 1957 to 1964, Idaho used the Resistance Value - Traffic Index method of Flexible Pavement Design as the primary design procedure. This procedure followed the basic California Department of Highways' procedure developed as a result of several test tracks and roads including the WASHO Test Road conducted at Malad during 1951 - 1953. Following the AASHO Road Test conducted in Illinois during the period of 1958 - 1963, the California Highway Department made a complete study of the results of the AASHO Road Test, the WASHO Road Test and other road tests. Based on these results and their own testing, California made a number of refinements to their design methods. This report compares the Idaho 1957 Design Method with the revised California method as published in Highway Research Board Record No. 13. Idaho loadometer data and traffic classification data were reviewed and used in this study to make a comparison with the design recommendations of the AASHO Committee on Design.

Download or read book Characterization and Development of Axle Load Spectra to Enhance Pavement Design and Performance on the Basis of New Mechanistic empirical Design Guide in Louisiana written by Bharath Kumar Sridhar and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: