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South Dakota Department of Transportation
Project Synopsis
SD1996-09


Title: Faulting Estimates from Longitudinal Profiles
Project Researcher: Blair Lunde, Not Applicable
Project Manager: Jon Becker
Research Period: -
Status:
Cost: $0.00

Problem Statement:During the inspection of the interstate to check the accuracy of the pilot distress survey for SDDOTs enhanced Pavement Management System (PMS), it became apparent that rating faulting accurately is difficult and time consuming. The procedure used in the pilot survey made the determination of faulting an estimate at best, especially when less than ¼ inch. From discussions with SDDOT personnel involved with the project, the faulting was checked during occasional stops, and then rated by the sound of passing traffic over the joints. The problem with this method is that many rehabilitated joints sound similar to a faulted joint.

To increase accuracy and minimize exposure to traffic, the Georgia Fault Meter was used. This handheld instrument is placed across a joint and displays the faulting measurement. It is more accurate than listening to traffic passing over the joint. However, it is still labor intensive because each joint must be measured and manually recorded.

There may be a way to measure faulting with the use of the road profiler. Having an automated method to collect this distress would place a much greater level of confidence in the faulting rating. In the future, it would allow the distress surveyors to concentrate on the other concrete distresses.

Roadware®, whose ARAN™ profiler system is used by SDDOT, has produced faulting software to be used along with its profile software. The software must be purchased from Roadware for evaluation purposes. If the software is inadequate, software may have to be developed to meet the Departments needs.

Findings:

Research Objectives:
1  To obtain or develop automated faulting data collection system to support SDDOT's enhanced pavement management system.

Research Tasks:
1  Perform literature search and interview of other DOT's regarding automated faulting measurement systems.
2  Determine SDDOT's faulting data requirements, including accuracy, frequency and summary methods.
3  Procure and install Roadware faulting software.
4  Establish test sections containing a range of faulting conditions and including rehabilitated joints.
5  Collect data in the right wheel path of driving lanes and evaluate software to determine accuracy, repeatability, ease of use, and data report format.
6  Work with Data Services to modify RES to accept faulting data.
7  Summarize data and report findings to technical panel by April 30, 1996.
8  Prepare a final report and executive summary of the literature review, research methodology, findings, conclusions, and recommendations.
9  Make an executive presentation to the SDDOT Research Review Board at the conclusion of the project.

Documents Available:

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