Design Practices for Rock Slopes and Rockfall Management (2022) / Chapter Skim
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Pages 30-32
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30 Summary of Findings According to input from 49 state DOTs and the 3 regional FHWA FLHD offices, the design of rockfall mitigation and new rock slopes is an important aspect of constructing and maintaining a reliable highway network. Modern design practices, intents, and tools have changed significantly since many highways were constructed in the mid-20th century.
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From page 31... ...
Summary of Findings 31 Site-Specific Goals Some DOTs noted that strict adherence to design goals regardless of site specifics could result in inefficient expenditures. A hypothetical example of this could be comparing a rock slope project on a route with a 40% effective ditch, low rockfall activity, and low traffic volumes versus a project with an 80% effective ditch, high rockfall activity, and high traffic volumes.
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From page 32... ...
32 Design Practices for Rock Slopes and Rockfall Management would assist DOTs with life-cycle cost forecasts and inform site selection decision making. Information on the deterioration rate, life-cycle costs, and their contributing factors is lacking based on survey responses.
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