Download or read book Development of Methods and Specifications for the Use of Inertial Profilers and the International Roughness Index for Newly Constructed Pavement written by Dwayne Harris and published by Joint Transportation Research Program. This book was released on 2013-10 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Indiana Department of Transportation (INDOT) is currently utilizing a profilograph and the profile index for measuring smoothness assurance for newly constructed pavements. However, there are benefits to implementing a new IRI based smoothness specification utilizing road profiles measured using inertial profilers. Technological advancements have improved the quality of road profiles measured using inertial profilers; furthermore, utilizing inertial profilers allows smoothness data to be collected much more quickly and efficiently than the methodology currently utilized by INDOT. Pavement smoothness quantified using International Roughness Index (IRI) calculated using profiles provided by inertial profiles is better correlated to user response than what is currently being utilized by INDOT. Furthermore, INDOT currently utilizes IRI to monitor the pavement smoothness throughout the remaining life of the pavement. Consequently, Utilizing IRI for measuring the smoothness of newly constructed pavements allows seamless monitoring of pavement smoothness from cradle to grave. This study presents an IRI based draft smoothness specification for newly constructed pavements utilizing profiles provide by inertial profilers. The process developing a draft specification included developing pay factor tables, developing the methodology for calculating the smoothness bonus, developing methodology for locating areas of localized roughness, and developing inertial profiler certification procedures.
Download or read book Implementation of an International Roughness Index for Mn DOT Pavement Construction and Rehabilitation written by W. James Wilde and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents the development and preparation for implementation of a specification for using International Roughness Index, using an inertial profiler, as a smoothness measure for new portland cement concrete pavements in Minnesota. This new specification represents a departure from the use of the Profile Index, using a California Profilometer, for concrete pavement smoothness. In addition to providing recommendations to the Minnesota Department of Transportation regarding the implementation of the specification, the report contains additional information and analyses. These include a summary of the specifications in use by other states for measurement and incentive/disincentive payment for concrete pavement smoothness, an analysis of the effects of pavement surface characteristics on the International Roughness Index and the Profile Index, and a comparison of IRI-based concrete pavement smoothness specifications in use by other states. The report concludes with several recommendations for the new specification and for its administration and enforcement by the Minnesota Department of Transportation.
Download or read book Constructing Smooth Hot Mix Asphalt HMA Pavements written by Mary Stroup-Gardiner and published by ASTM International. This book was released on 2003 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication contains papers presented at a December 2001 symposium, focusing on hot mix asphalt (HMA) smoothness measurements, specifications, and equipment. Five papers provide insight into the development and implementation of roughness specifications for pavements, and two papers offer natio
Download or read book Device Harmonization to Determine Smoothness Specification for Asphalt Pavements written by J-S Chen and published by . This book was released on 2006 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pavement smoothness is a key factor in determining highway user satisfaction. Because of technical limitations of traditional equipment and measurement procedures, the adequacy of a straightedge in characterizing roughness and having it relate to user response has come to question. One barrier to more widespread implementation of a new smoothness standard is the lack of objective, verifiable correlation methods for use in establishing specification limits. The purpose of this study was to (1) develop statistical approaches to harmonize two different measurement devices, i.e., a 3-m straightedge and an inertial profiler; and (2) determine the specification for flexible pavements. The device harmonization requires the development of procedures for statistically testing through comparisons to reference measurements. Data collected from 85 pavement sections on newly constructed and resurfaced highways were examined to demonstrate the device's ability to measure specific smoothness properties. Smoothness data are shown to be normally distributed according to the chi-squared test. Test results obtained from straightedge are found to be significantly different from those from profiler. Smoothness specifications applied for straightedge cannot be directly used to those for profiler. A conversion equation is developed to help contractors convert smoothness measurements between these two devices based on the same acceptance level. The International Roughness Index (IRI) obtained from the profiler appears to provide better measures of smoothness and better correlation with user response. Four following ranges are proposed for the smoothness specification according to the acceptance smoothness level: bonus, full pay, penalty, and correction. As the acceptance probability sets at 20%, the bonus threshold value should be less than 1.20 mm and 2.55 m/km for straightedge and profiler, respectively. The acceptance level is found to be below 2.60 mm and 3.60 m/km for straightedge and profiler, respectively. The demarcation line between penalty and correction is drawn at 95% of the acceptance probability with corresponding values of 3.35 mm and 4.10 m/km for straightedge and profiler, respectively. This research effort has developed a series of relationships between IRI and straightedge that can assist highway agencies in transitioning to IRI smoothness specification for pavements.
Download or read book Development and Evaluation of an Inertial Based Pavement Roughness Measuring System written by Fengxuan Hu and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Roughness is an important indicator of pavement riding comfort and safety. It is a condition indicator that should be carefully considered when evaluating primary pavements. At the same time, the use of roughness measurements plays a critical role in the pavement management system. There are many devices used for roughness evaluation. The major tools used for road roughness quantify are the road profilers. In the thesis research, in order to obtain useful pavement surface condition data for pavement evaluation, an inertial based pavement roughness measuring system was developed with the combination of modern sensor technology and computer technology. The research will focus on the development of new method to get the profile in order to improve the repeatability of the inertial based pavement roughness system, the hardware design and the software development which is used for data sampling and data analysis. Finally maximum entropy spectral analysis method was used to evaluate the road profile spectrum. In order to get evaluate the accuracy and correction of the laser profiler system, different roughness devices (including Dipstick, direct type profiler and the laser profiler developed) were operated in the test sites. The research focused on several performance measures, such as repeatability (before and after new method analysis), impact of operating speed and sample interval, correlativity and etc. IRI from these devices were analyzed to evaluate the correlativity between these devices. Some regression models were developed in this research. Test results show that the new method can improve the repeatability of the profiler system. The laser profiler system has good repeatability and the operating speed and sample interval do not have a significant impact on the inertial based roughness measuring system. With the reliable results, the system is ready to be used in the field application within the speed and sample interval range. Through the spectrum analysis, it shows that the spectrum has a qualitative relation with pavement roughness conditions.
Download or read book Transportation Research Record written by and published by . This book was released on 2003 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inertial and Inclinometer Based Profiler Repeatability and Accuracy Using the IRI Model written by Michael J. Olson and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Oregon DOT is transitioning to use the International Roughness Index (IRI) for an incentive\disincentive program for pavement smoothness evaluation for newly paved roads. The IRI will typically be determined by contractors using inertial profilers. This research evaluated the procedures, site, and equipment used for establishing a reference profile for a certification process for inertial profilers. In a comparison of several profiling devices, the inclinometer-based profiler used by Oregon DOT for the reference profile showed sufficient results in repeatability and accuracy in profile measurement and calculation of IRI. However, the certification site shows significant variability in IRI across the site, which can lead to lower accuracy scores when the exact path is not followed. Further, significant differences in IRI were observed during repeat visits throughout the course of the study period. This study also evaluated the use of a new technology, terrestrial laser scanning, for pavement analyses.
Download or read book Construction 2000 written by and published by . This book was released on 2000 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pavement Smoothness Index Relationships written by Kelly L. Smith and published by . This book was released on 2002 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nearly all State highway agencies use smoothness specifications to ensure that hot-mix asphalt (HMA) and portland cement concrete (PCC) pavements are built to high levels of smoothness. About half of all current State smoothness specifications for HMA and more then three-fourths of all current PCC smoothness specifications are centered around the Profile Index (PI), as often measured using a profilograph. The vast majority of these specifications utilize a 5-mm (0.2-in.) blanking band in computing PI (i.e., PI5-mm). Assistance in selecting appropriate IRI and PI0.0 specification limits is needed to provide a basis for modifying current specifications to these more reproducible and portable smoothness indices. This research effort has developed a series of relationships between IRI and PI that can assist States in transitioning to IRI or PI0.0 smoothness specification for HMA and PCC pavements.
Download or read book Federal aid Policy Guide written by and published by . This book was released on 1995 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Profile Equipment Evaluation written by E. G. Fernando and published by . This book was released on 1997 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Texas Department of Transportation (TxDOT) is implementing smoothness specifications based on profilograph testing as part of its construction quality control/quality assurance (QC/QA) program. Most tests are presently conducted using automated, California-type profilographs in which the equipment is pushed over a prescribed wheelpath. It appears that smoothness specifications will continue to be based on the profilograph, at least for the short term. However, in view of advances in profiling technology, it becomes prudent to investigate other methods of measuring surface profile and develop smoothness specifications based on profilers that offer greater accuracy and higher production rates. Already, a number of districts have expressed concerns about the sensitivity of the profilograph to short wavelengths or high frequency ripples. This observation demonstrates the need for more accurate measurements of surface profile for the purpose of building pavements that offer excellent ride quality, lower road user costs, and longer service lives. In pursuit of its goal of providing smooth pavements, TxDOT initiated a research project with the Texas Transportation Institute (TTI) to develop a smoothness specification for asphalt concrete overlays based on the new generation of pavement profilers that offer greater accuracy in profile measurement relative to the profilographs presently used in construction projects. Among other things, this research project evaluated a number of profile measuring devices to establish the availability of equipment for implementing a new profile-based smoothness specification in Texas. This report presents the findings of the profile equipment evaluation.
Download or read book Refinement of Measurement Techniques of Road Profile and International Roughness Index IRI to Support the KDOT Pavement Management System PMS Annual Road condition Survey Research written by Stephen A. Dyer and published by . This book was released on 2005 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project is the first phase of a proposed larger research effort whose goal is twofold: 1) to determine effective guidelines for collecting and processing road profiles; and 2) to determine, insofar as possible, the specific causes of the poor repeatability in the data obtained by the present Kansas Department of Transportation (KDOT) Pavement Management System.
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 Effect of Temperature Differentials on Density and Smoothness written by CT. Wagner and published by . This book was released on 2003 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Roadware ARAN inertial profiler was used to calculate the International Roughness Index (IRI) for the Auburn University National Center for Asphalt Technology (NCAT) test track tangent sections as well as three paving projects in Michigan. IRI values were calculated for short intervals [4.6 to 7.6 meters (15 to 25 feet)] rather than for the traditional 160 meters (0.1 mile). These short intervals were able to identify easily localized anomalies in the pavement smoothness due to changes in the construction activities. They were also useful in evaluating relationships between IRI and mix variables in the short NCAT test track test sections [60 meters (200 feet)].
Download or read book Innovative Means of Collecting International Roughness Index Using Smartphone Technology written by Coady Cameron and published by . This book was released on 2014 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: International Roughness Index (IRI) is a widely used pavement performance measure collected with specially equipped vehicles; however, the cost of data collection may limit the ability of some road authorities to procure the data. Recent advances in smartphone technology have created interest in their potential to be low-cost mobile data collection platforms. This study compared IRI from an inertial profiler to IRI calculated from a smartphone' s accelerometer over a 1 km test section of road in New Brunswick, Canada. The study also included four scenario tests to evaluate the effects of varying the following experimental factors: vehicle type, device manufacturer, mounting arrangement and speed. The correlation between the smartphone' s results and those collected using the inertial profiler was found to be 88.9% for 100m increments along the section. The scenarios returned average IRI values ranging from 0.8% to 85% different than the average IRI of 2.60 m/km collected using the inertial profiler, though the smartphone configurations had higher coefficient of variations ranging from 2.05 to 9.11 compared to the inertial profiler's 1.12.
Download or read book Investigation of Lightweight Profiler Smoothness Measurements for Contract Acceptance and Network Monitoring written by John A. Blair and published by . This book was released on 2006-01-01 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ontario Ministry of Transportation currently bases smoothness acceptance of newly-constructed pavements on Profile Index (PI) and the height of individual bumps measured by devices called California Profilographs. This report summarizes a field study which compared California Profilographs with much newer and faster golf-cart devices called laser inertial (i.e., lightweight) profilers, which can be used to measure both PI and International Roughness Index (IRI) for both wheelpaths simultaneously and at speeds of 15 to 20 km/hr.
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:
