Aesthetic Concrete Barrier Design (2006) / Chapter Skim
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assemble a collection of examples of longitudinal traffic barriers exhibiting aesthetic characteristics and (2) develop engineering design guidelines for aesthetic surface treatments of concrete safety shape barriers (e.g., New Jersey and F-shape profiles)
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It may be possible to communicate patterns through the contrast in reflectivity brought about by small changes in surface angles. Adding aesthetic treatments to the interior of concrete barriers will entail the addition of vertical edges (i.e., lines perpendicular to the line of the barrier)
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Dimensions of typical bridge railings (in millimeters)
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Alternative A1 -- single-slope barrier.
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This study was used to compare the effect of lengthening a continuous pattern, in this case an architectural pattern. The curves of the arches seem to be in character to the rounded forms of the rural background.
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21 Figure 16. Alternative C1 -- 7.6-m arch.
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Alternative F -- Open Tube Rail This rail, shown in Figure 25, exhibits the same characteristics as Alternative E It is similar in concept to the widely used Wyoming Rail that features square tubing.
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23 VIEWER PREFERENCE SURVEY The viewer preference survey was performed in preparation for establishing the design guidelines for aesthetic concrete barriers and see-through bridge rails. The barriers selected for the study met fundamental aesthetic principles of attractive form, line, balance, and proportion and were studied in different background settings (i.e., rural and urban)
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experience gained by the researchers indicates that most aesthetic rail designs will meet with the favor of the general public. If it can be assumed that people will like a particular design, the questions, then, are "will people even notice the rail?
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A plain, single-slope concrete barrier and W-beam guardrail were used as a control. Computer models of the rails were created and then inserted into photographs of rural and urban background scenes.
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26 Figure 27. Barrier/rail designs used in viewer preference survey.
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▪ Busy feeling ▪ Historic feeling – Photograph Sets 3 and 6 -- Rural and urban control sets, respectively (Figure 30) ▪ Scenic feeling ▪ High-speed feeling ▪ Boring feeling ▪ Congested feeling ▪ Typical feeling ▪ Stressful feeling – Photograph Set 4 -- Urban at grade (Figure 31)
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28 Figure 30. Photo Sets 3 and 6 -- rural and urban control images.
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This information was obtained by reviewing the literature and surveying state DOTs, roadside safety researchers, and crash-testing laboratories in the United States and internationally. The remainder of this report presents the methodology used for developing design guidelines for aesthetic concrete safety shape barriers based on finite element simulation and full-scale crash testing of specific asperities cast into the face of concrete safety shape barriers.
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