Geotechnical Asset Management for Transportation Agencies, Volume 1: Research Overview (2019) / Chapter Skim
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Pages 11-30
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11 3.1 Definition of the Geotechnical Asset Category and Types The glossary in the AASHTO Transportation Asset Management Guide: A Focus on Implementation (2011) defines an asset as follows: An asset is the physical transportation infrastructure (e.g., travel way, structures, other features and appurtenances, operations systems, and major elements thereof)
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12 Geotechnical Asset Management for Transportation Agencies, Volume 1: Research Overview (see "Taxonomy of Geotechnical Assets" in Chapter 5 of the GAM Implementation Manual)
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Findings and Applications 13 wall height for inclusion into a GAM plan is 4 feet of exposed face height, which is based on what commonly defines an engineered retaining wall. In many cases, a retaining wall is associated with a bridge structure or approach to a bridge.
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14 Geotechnical Asset Management for Transportation Agencies, Volume 1: Research Overview maintenance. The Highways England geotechnical program has matured in stages, starting from a program directed at producing specific outputs (e.g., inventory for geotechnical assets)
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Findings and Applications 15 valuable concepts to emulate. Domestically, the literature review and case study findings showed that several transportation agencies and infrastructure owners in the United States are working toward GAM implementation, with progress most evident in processes related to inventory, condition measurement, and risk analysis.
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16 Geotechnical Asset Management for Transportation Agencies, Volume 1: Research Overview 3.3.2 Development of a GAM Implementation Framework and Workflow In the literature, discussions about asset management and GAM generally have covered strategic-level concepts or the agency-specific processes, systems, or data within an asset management program. The case study interviews performed for this project provided an opportunity to understand the perspectives of agency staff who may implement a new asset management program and how the cultures and relationships at differing levels of an agency can influence implementation.
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Findings and Applications 17 intersecting points at which an action (e.g., GAM implementation) transitions between being less likely to occur and more likely to occur in response to environmental prompts or triggers.
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18 Geotechnical Asset Management for Transportation Agencies, Volume 1: Research Overview implementation success. A more complex program or a higher GAM maturity level is best viewed as an outcome of a successful implementation that enables justified process improvements with time, a conclusion that is supported by the successful programs listed in Table 3.1.
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Findings and Applications 19 • Enable the user to learn supporting aspects of GAM once implementation has started, thus eliminating the barrier of having to learn new concepts before starting. – Part C of the GAM Implementation Manual follows the implementation steps in Part B and contains chapters that provide background on TAM, performance measures, risk, and practical considerations for implementation of GAM in an agency.
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20 Geotechnical Asset Management for Transportation Agencies, Volume 1: Research Overview The GAM Implementation Manual introduces an outward-facing, executive-level measure called "level of risk (LOR) ." The LOR is a grade-based categorical measure for asset performance communication to executives.
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Findings and Applications 21 The International Infrastructure Management Manual (IIMM) presents a staged approach as a practical process for data collection that considers the investment constraints (IPWEA 2015)
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22 Geotechnical Asset Management for Transportation Agencies, Volume 1: Research Overview In the GAM Implementation Manual, content and figures in Chapter 4 are included to provide an introduction to the concepts of asset life-cycles and their application to geotechnical assets. The manual then expands the life-cycle discussion to introduce the TAM concepts for what treatments can be performed on an asset following construction.
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Findings and Applications 23 The existing research on TAM implementation discusses agency benefits in terms of changes in O&M cost or changes in data collection, processing cost, and analysis cost. The GAM Implementation Manual provides guidance for using these categories when making comparisons between an incorporation of GAM into the TAM program.
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24 Geotechnical Asset Management for Transportation Agencies, Volume 1: Research Overview manage these sites using the same design, maintenance, rehabilitation, or replacement treatment concepts that are applied to geotechnical assets in the ROW. Given these considerations, an agency generally has limited control over the factors that contribute to asset deterioration or events precipitated by beyond-the-ROW features, but must address the consequences once an event occurs that affects operations and assets within the ROW.
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Findings and Applications 25 This use of the term is not unique to geotechnical assets, and the location references for all assets can have differing levels of complexity depending on agency data resources, capabilities, technology, and the precision needed for decision-making. In general, three methods of location referencing can be used simultaneously, depending on data management functions, including: • One-dimensional (1-D)
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26 Geotechnical Asset Management for Transportation Agencies, Volume 1: Research Overview Based on the research team's synthesis of case study interviews, data and data management aspects of GAM were identified as potential barriers to implementation success because of their perceived complexity, the need for training in new concepts, and the variability of existing agency systems and practices. To overcome these potential barriers, the GAM implementation framework and GAM Planner were developed to minimize the complexity of initial data management, thus allowing agencies starting GAM to focus on implementation without having to expend time, energy, or training resources learning new or difficult data management concepts or software programs.
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Findings and Applications 27 The staff organization structure for existing TAM programs varies by DOT, but typically involves some form of a senior-level enterprise asset manager working in parallel with or within other functional disciplines, such as design, construction, O&M, financial, and administration. For development of the GAM Implementation Manual, it was anticipated that most DOTs would not be able to formally establish a high-functioning GAM implementation team at the start of GAM implementation.
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28 Geotechnical Asset Management for Transportation Agencies, Volume 1: Research Overview investment needs. Simply stating a program-level investment need that shows a favorable ROI does not guarantee enabling program funding, given that every asset group is likely in a similar investment need condition.
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Findings and Applications 29 • Risk Prioritization: The GAM Implementation Manual presents a discussion of differing prioritization concepts that can be considered when communicating needs with executive stakeholders who can enable program funding. These risk prioritization areas include selecting treatment candidates based on concentration of risk, acceptable risk exposure levels, sources of risk, type of risk, cross-asset risks, critical routes or high-value assets, or risks to outside compliance needs.
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30 Geotechnical Asset Management for Transportation Agencies, Volume 1: Research Overview this distinction, an agency does not need to develop a GAM plan prior to GAM implementation. Evidence from the long-standing GAM programs for highway and rail agencies in the United Kingdom indicates that asset management plans are regularly updated documents that summarize performance and present process improvements over prior plans.
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