Estimation of Waviness of the Longitudinal Road Profile from Straightedge Measurement
Publication: Journal of Transportation Engineering
Volume 135, Issue 11
Abstract
The paper presents a method for estimation of power spectral density (PSD) parameters (unevenness index and waviness) of a longitudinal road profile in the short wavelength band from data collected by straightedge (SE) measurement (distance of contact points of the lath and maximum clearance from the straightedge between the supports). This method is based on the estimation of mean values of straightedge measurement parameters established by simulated artificial profiles of different waviness levels from 1.5 to 3.5. The method was validated on a series of simulated profiles with different waviness values and on some in-service road profile records. The method provides a reliable estimate of waviness as a complement to the currently used straightedge indicators based on the mean maximum clearance under the straightedge. Thus, mutual conversion between SE- and PSD-unevenness indicators is possible.
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Acknowledgments
This work has been partially undertaken within the Grant No. UNSPECIFIED2/6161/26 of the VEGA Grant agency of Slovak Academy of Sciences. The support of the Agency is gratefully acknowledged. Further, the writers highly appreciate the voluminous work conducted by the LTPP team and additional information provided by the LTPP Customer Service.UNSPECIFIED
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Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 135 • Issue 11 • November 2009
Pages: 801 - 812
Copyright
© 2009 ASCE.
History
Received: Apr 10, 2008
Accepted: Apr 7, 2009
Published online: Apr 16, 2009
Published in print: Nov 2009
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