Managing Selected Transportation Assets: Signals, Lighting, Signs, Pavement Markings, Culverts, and Sidewalks (2007) / Chapter Skim
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5BACKGROUND Modern road transportation systems comprise many physical components, or assets, that enable them to fulfill the public's expectations to travel to their destinations safely, conveniently, in reasonable time, and at reasonable cost. Roadway pavements and bridges are among the most visible and highly valued elements of highways, roads, and streets.
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• Sidewalks, including the walkway itself, curbs, and corners on urban roads and streets (corner curbs, and curb cuts and ramps if present)
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7chapters two through seven. At the same time, the importance of viewing asset management comprehensively is a major reason for consolidating findings across assets and describing strategic agency management approaches in chapter eight.
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8General Stages of Infrastructure Management Maturity Aspect of Infrastructure Management Basic Infrastructure Management Growing Application of Asset Management State-of-the-Art Asset Management Overall Description of Agency Practice Investment and management decisions reflect current public policy objectives and good standard engineering practice. Thinking and decision making tend to be organized around specific programs, projects, and technologies, with little cross-program interaction.
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9General Stages of Infrastructure Management MaturityAspect of Infrastructure Management Basic Infrastructure Management Growing Application of Asset Management State-of-the-Art Asset Management Asset Performance and Costs Asset performance is understood in basic terms such as estimated service life and measures of condition and reliability, based largely on historical data, engineering judgment, and manufacturer's recommendations. Predictive models of asset deterioration are simple (if they exist at all)
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10 General Stages of Infrastructure Manage me nt Maturity Aspect of Infrastructure Management Basic Infrastructure Management Growing Application of Asset Manage me nt State-of-the-Art Asset Manage me nt Organization Decision ma king occurs in silos, and inform ation is not readily accessible across an agency . Awareness of asset ma nage me nt occurs at professional conferences or through literature.
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11 convenient but arbitrary. For example, the AASHTO Transportation Asset Management Guide gives more detailed examples of state-of-the-art practice and compares typical current practices with equivalent practices with good asset management.
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practices for selected assets compare with the benchmarks set for good asset management. The result will be an assessment of the range of practices now in use, identification of gaps and potential research needs regarding management of the selected assets, and a focus on those agencies that are "at the front of the curve" regarding their management of the selected infrastructure assets.
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13 signs, and signals at intersections and crosswalks; and the combined roles of roadway lighting and pavement marking conditions in ensuring adequate nighttime visibility of centerline, lane, and edge striping. – The need for a system-level view of selected asset performance; for example, the role of signal systems in providing safe, efficient movement of traffic along a length of roadway rather than just through a single intersection; and the ability of traffic signals, roadway lighting, road signs, pavement markings, and sidewalks to serve adequately different segments of the population and different types and configurations of vehicles.
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