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Title: Advanced Analysis of Pavement Profiles
Accession Number: 01020238
Record Type: Component
Availability: Transportation Research Board Business Office 500 Fifth Street, NW Abstract: Power spectrum density (PSD) analysis is commonly used to determine the distribution of profile energy among its constituting wavelengths. However, the road geometrical curve in the profile introduces artifacts in calculation of PSD functions and accounts for the dominating low frequency portion of the power spectrum, which often masks the variations in the amplitudes of higher frequency components which are of interest in pavement smoothness evaluation. To distinguish different frequency features in the profile and improve the PSD estimation of pavement profiles, it is necessary to remove the geometry trend. In the first part of this paper, a number of issues concerning the common practice of profile filtering are discussed and an alternative filtering operation is proposed. Application of wavelet transforms as advanced diagnostic tools is proposed in the second part of the paper. Although PSD analysis provides the wavelength content of profiles, it cannot be used to locate various frequency features. Wavelet transforms, on the other hand, provide a 2D representation of the distance-varying spectrum of the profile in which frequency features (e.g. repeated waves and short-lived surface distress) can be recognized and located. Advantages of wavelet analysis over PSD analysis are illustrated by presenting the results of the analyses performed on a number of profiles, taken from data collected as a part of a New Jersey Department of Transportation (NJDOT) sponsored research project. The results indicate that wavelet analysis can capture both high and low frequency features of the profile, and, consequently, provides a better representation of the profile smoothness characteristics.
Monograph Title: Monograph Accession #: 01020180
Report/Paper Numbers: 06-2688
Language: English
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Authors: Pagination: 21p
Publication Date: 2006
Conference:
Transportation Research Board 85th Annual Meeting
Location:
Washington DC, United States Media Type: CD-ROM
Features: Figures
(10)
; References
(13)
TRT Terms: Geographic Terms: Subject Areas: Design; Energy; Highways; Pavements; I22: Design of Pavements, Railways and Guideways
Source Data: Transportation Research Board Annual Meeting 2006 Paper #06-2688
Files: TRIS, TRB
Created Date: Mar 3 2006 11:05AM
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0000-0001-9083-9317