An Introduction to NCDOT’s Performance-Based Geotechnical Asset Management Program
Development of the Rockfall Hazard Rating System in the early 1990s provided tools and an approach to quantify rockfall problems and develop mitigation strategies. The mountains of Western North Carolina, due to climate and lower relief, present equal or more problems with other geo-hazards including landslides and embankment failures. The inclusion of all failure types into rating systems presents difficulties in two areas: defining the specific failure mechanisms relative to each site and defining the hazard and associated risk. Statistics show that North Carolina drivers have had very few incidents or injuries and no deaths due to highway geo-hazards over the past 35 years. The direct costs due to repairs and indirect costs due to closures and detours sum to several hundred million dollars. When considering hazard ratings and Geotechnical Asset Management (GAM) programs, North Carolina Department of Transportation (NCDOT) was necessarily driven to emphasize the disruption factor and expense of slope failures more than an increase in safety. In addition to desired accumulation of historical documentation and institutional knowledge, NCDOT’s GAM program incorporates categories including route type, detour factor, average vehicle risk, groundwater presence, previous failure, previous remediation, and estimated repair time to assign numerical scores to sites. The applied multipliers attempt to differentiate sites relatively. The rating does not consider the failure mechanism, it assumes a complete geologic and engineering study has quantified the site. Each site is provided a recommendations report and/or mitigation plans and quantities for future repair- either to use preemptively or in case of failure.
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Supplemental Notes:
- Copyright © 2016 Highway Geology Symposium (HGS). Abstract reprinted with permission of the HGS.
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Corporate Authors:
Highway Geology Symposium
, United States -
Authors:
- Johnson, Crystal
- Kuhne, Jody
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Conference:
- 67th Highway Geology Symposium
- Location: Colorado Springs Colorado, United States
- Date: 2016-7-11 to 2016-7-14
- Publication Date: 2016
Language
- English
Media Info
- Media Type: Digital/other
- Features: Figures; Photos; References;
- Pagination: pp 352-370
- Monograph Title: Proceedings of the 67th Highway Geology Symposium (HGS 2016)
Subject/Index Terms
- TRT Terms: Asset management; Economic impacts; Geotechnical engineering; Ranking (Statistics); Ratings
- Uncontrolled Terms: Geohazards
- Geographic Terms: North Carolina
- Subject Areas: Geotechnology; Highways; Planning and Forecasting;
Filing Info
- Accession Number: 01630379
- Record Type: Publication
- Files: TRIS
- Created Date: Mar 27 2017 9:35AM