Repeatability in Crack Data Collection on Flexible Pavements: Comparison between Surveys Using Video Cameras, Laser Cameras, and a Simplified Manual Survey
Publication: Journal of Transportation Engineering
Volume 131, Issue 7
Abstract
Crack data can be collected using manual or automatic surveys. Traditionally, manual methods are used, and they are still the most common. Changing into automatic systems will enhance the efficiency of data collection as well as the objectivity. In this study the repeatability of an automatic crack data collection system using video images was evaluated. Ten repetitive measurements were made on a 10-km-long road section. Cracking was measured using six laser cameras attached to the same vehicle. The results from the two methods were compared. Simultaneously, a simplified manual windshield survey was conducted by three different persons, and the repeatability obtained was used for comparison with the repeatability established using the image and laser method, respectively. The correlation between repeated measurements using the two automatic systems was high, while the repeatability for the manual, subjective method was low. Suitable measures for crack characterization are discussed.
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Acknowledgment
The financial support provided by the Swedish National Road Administration, through the Centre for Research and Education in Operation and Maintenance of Infrastructure, is gratefully acknowledged.
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Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 131 • Issue 7 • July 2005
Pages: 552 - 562
Copyright
© 2005 ASCE.
History
Received: May 13, 2003
Accepted: Aug 24, 2004
Published online: Jul 1, 2005
Published in print: Jul 2005
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