Consequences of Delayed Maintenance of Highway Assets (2017) / Chapter Skim
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From page 6... ...
6C H A P T E R 2 2.1 Introduction Although each highway asset group has unique characteristics that must be addressed in any asset management methodology, commonalities exist that allow a generalization of the approaches proposed in this work. Figure 1 shows a generic framework that has been considered when developing asset management procedures (FHWA 2010a)
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Framework for Quantifying Delayed Maintenance of Highway Assets 7 This chapter introduces the fundamental principles on which the general framework was developed. It provides an overview of the asset management process and the information needed to support the three-step asset management framework.
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8 Consequences of Delayed Maintenance of Highway Assets the overall condition of the transportation facility" (FHWA 2016a)
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Framework for Quantifying Delayed Maintenance of Highway Assets 9 analyses applied in the framework, provides a precautionary discussion about insufficient data and information, and suggests approaches usable to begin the analyses with limited data. 2.4 Condition Assessment, Service Life, and Performance Measures Step 2 of the general framework involves determining maintenance and budget needs.
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10 Consequences of Delayed Maintenance of Highway Assets Condition assessment for an asset group generally includes individual distress measures, condition indices, and other performance measures to evaluate the current condition of the assets in that group. Reporting requirements related to asset condition and performance measures at the national level include the following: • Specific pavement and bridge performance measures must be reported on the NHS as a part of the National Highway Performance Program (NHPP)
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Framework for Quantifying Delayed Maintenance of Highway Assets 11 Delaying maintenance affects the asset condition, decreases the LOS, and increases the costs. Agencies commonly measure the increase in maintenance and rehabilitation or reconstruction costs required to preserve the highway system at some designated LOS; however, delaying maintenance of highway assets has consequences that affect more than just agency costs.
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12 Consequences of Delayed Maintenance of Highway Assets Category Performance Measure Definition Pavement Condition Interstate pavement in good, fair and poor condition based on the International Roughness Index (IRI) "Percentage of 0.1-mi.
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Framework for Quantifying Delayed Maintenance of Highway Assets 13 For highway assets that exhibit a predictable reduction in condition over time, models are typically developed to predict that condition change over time. Generally, condition data from field assessments are used with statistical methods to develop such models.
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14 Consequences of Delayed Maintenance of Highway Assets performance measure) based on age, usage, environmental factors, and asset properties.
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Framework for Quantifying Delayed Maintenance of Highway Assets 15 For asset groups whose performance models predict deterioration for individual asset segments or groups of asset segments, the change in condition or asset performance may be used to identify when the segment or group of segments will reach a point -- often called a trigger value -- at which preventive maintenance is needed. When the preventive or condition trigger value is approached or reached, the analysis module can identify the candidate segment or group of segments for application of maintenance.
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16 Consequences of Delayed Maintenance of Highway Assets cycle (or a sequence of funding cycles) , and often are related to the agency's fiscal year; however, other periods may be used.
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Framework for Quantifying Delayed Maintenance of Highway Assets 17 of delayed maintenance. Analytical tools currently employed by highway agencies are at different maturity levels, as shown in Figure 3 (Rose et al.
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18 Consequences of Delayed Maintenance of Highway Assets identifies differences in results for (1) investing different amounts of funding, or (2)
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