Download or read book Development of a Road Roughness Measurement and Evaluation System written by Waddah Weld Ali and published by . This book was released on 2001 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Development of Automatic Measuring Systems for Pavement Roughness Evaluation written by Min Zhou and published by . This book was released on 1999 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Federally Coordinated Program of Highway Research Development and Technology written by and published by . This book was released on 1983 with total page 838 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Direct type and Response type Automatic Pavement Roughness Evaluation System written by Chongkang Zhu and published by . This book was released on 2001 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of a Direct Type Road Roughness Evaluation System written by Fengxuan Hu and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: From field experiments and data analysis, it shows: 1. Direct type I profiler showed satisfactory repeatability performances; 2. Direct type I profiler has good RN correlations High-Speed laser profiler; 3. Direct type I profiler has good correlations with Dipstick, High-Speed laser profiler in terms of IRI 4. Direct type II profiler does not has good correlation with direct type I profiler; the performance needs to be improved. Except for these conclusions, it is also found that the High-Speed profiler can be operated at different speeds with little differences in RN values, the sampling rate did show impact on RN value.
Download or read book Guidelines for Conducting and Calibrating Road Roughness Measurements written by Michael W. Sayers and published by . This book was released on 1986 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Road roughness is gaining increasing importance as an indicator of road condition, both in terms of pavement performance, and as a major determinant of road user costs. This paper defines roughness measurement systems hierachically into four groups, ranging from profilometric methods (2 groups), through response type road roughness measuring systems (RTRRMS's), and, subjective evaluation. The International Roughness Index (IRI) is defined, and the programs for it's calculation are provided. The IRI is based on simulation of the roughness response of a car travelling at 80 km/h. The report explains how all roughness measurements can be related to this scale, also when travelling at lower speeds than 80 km/h. The IRI emerges as a scale that can be used both for calibration and for comparative purposes.
Download or read book Highway Research Development Studies written by United States. Bureau of Public Roads. Office of Research and Development and published by . This book was released on 1968 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development and Evaluation of a Method for Validation of Pavement Roughness Measurements written by Hans Prem and published by . This book was released on 1998 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Federally Coordinated Program of Highway Research Development and Technology Annual Progress Report Fiscal Year 1985 written by and published by . This book was released on 1986 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications written by United States. National Bureau of Standards and published by . This book was released on 1991 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Handbook of Highway Engineering written by T.F. Fwa and published by CRC Press. This book was released on 2005-09-28 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern highway engineering reflects an integrated view of a road system's entire lifecycle, including any potential environmental impacts, and seeks to develop a sustainable infrastructure through careful planning and active management. This trend is not limited to developed nations, but is recognized across the globe. Edited by renowned authority
Download or read book Department of Transportation and related agencies appropriations for 1982 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations and published by . This book was released on 1981 with total page 930 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measuring Road Roughness and Its Effects on User Cost and Comfort written by Thomas D. Gillespie and published by ASTM International. This book was released on 1985 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Walker Roughness Device for Roughness Measurements Final Report written by Roger S. Walker and published by . This book was released on 1987 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of a System for High speed Measurement of Pavement Roughness Final Report written by Roger S. Walker and published by . This book was released on 1971 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book FHWA Nationally Coordinated Program of Highway Research Development and Technology Progress Report 1989 written by and published by . This book was released on 1989 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
