Managing Selected Transportation Assets: Signals, Lighting, Signs, Pavement Markings, Culverts, and Sidewalks (2007) / Chapter Skim
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Pages 34-47
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35 OVERVIEW Roadway lighting promotes safer, more efficient, and more comfortable and convenient travel at night for vehicles, pedestrians, and cyclists. By illuminating the surface and adjacent features of the roadway or sidewalk users may better see conditions some distance ahead.
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No Response Other Agency Guidelines Public Policy Natíl. Standards Statutes Percentage of Responses 0 20 40 60 80 100 FIGURE 21 Technical management guidance for maintenance and rehabilitation of roadway lighting.
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37 for environmental reasons; for example, reduction in light pollution and protection of wildlife movements. The recent international scan of European road lighting practices, sponsored by AASHTO, FHWA, and NCHRP, has documented several guidelines to reduce sky glow (Wilken et al.
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have a separate budget line item for maintenance of roadway lighting; 17 of 39 agencies (44%) responded affirmatively.
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39 Highway construction projects call for lighting system replacement/rehabilitation. -- Oregon DOT Each district has its own method.
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More Than Once A Year Annually Biennially Less Freq Than Biennially FIGURE 26 Frequency of physical condition assessments of roadway lighting. 40 physical as well as qualitative terms.
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41 No Response No Info. Collected Other Customer Complaints Customer Surveys Non-Destructive Testing Physical Measurement Photo, Video Visual Inspection 0 20 40 60 80 100 Percentage of Responses FIGURE 27 Data collection methods for condition and performance of roadway lighting.
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ASSET SERVICE LIFE Information on service life was obtained in the study survey for three major components of lighting systems: the structural supports (poles and arms) , lamps, and other items (e.g., ballast, photocells, and control panels)
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43 8 7 6 N o. o f R es po ns es 5 4 3 2 1 0 0 5 10 15 20 25 30 35 40 45 50 Estimated Service Life, Years FIGURE 29 Estimated service life of tubular steel mast arm for roadway lighting.
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87 6 N o. o f R es po ns es 5 4 3 2 1 0 0 1 2 3 4 5 6 7 8 9 10 Estimated Service Life, Years FIGURE 32 Estimated service life of high-pressure sodium vapor lamps for roadway lighting.
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87 6 N o. o f R es po ns es 5 4 3 2 1 0 0 1 2 3 4 5 6 7 8 9 10 Estimated Service Life, Years FIGURE 34 Estimated service life of photocells used in roadway lighting.
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46 0 10 20 30 40 50 60 70 80 90 100 No Response None of the Above Other Historical Database PMs, Dashboards, Accountability GIS Maps, Reports GIS Interface Est. Asset Impacts on Public Track Public Comments Cost Models for Treatments Other Optimization Procedures Benefit-Cost, LCC Decision Rules or Trees Inspector Recommendations Established Mntce.
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47 that roadway lighting had not yet been developed within its asset management framework (Saskatchewan) , and that legacy systems for maintenance management did not yet have a road inventory needed for asset management (Nevada)
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from positive-contrast illumination of pedestrians. [An initial experiment applying this Swiss technique in the United States is described in Hasson et al.
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