Evaluation of Methodologies for Visual Impact Assessments (2013) / Chapter Skim
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S u m m a r y NCHRP Report 741: Evaluation of Methodologies for Visual Impact Assessments documents the findings of NCHRP Research Project 25-33. The research sought to relieve ambiguity in the VIA process and develop a set of best practices from which state departments of transportation (state DOTs)
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2Although the need to create a better VIA procedure is generally acknowledged, especially by federal agencies, no new VIA procedure has emerged. Outside of transportation departments, the assessment of visual impacts has also become murkier.
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3 Literature Review The academic and professional literature was searched for critiques of VIA methodologies used on transportation projects. The review was to include a wide range of VIA methodologies from the 40 years since NEPA's passage required federally funded or permitted projects to assess visual impacts.
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42. Over half the states (56%)
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5 state DOTs. The survey yielded substantially fewer than 20 projects.
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614. The United Kingdom assures that impacts to the visual resources of the physical environment are differentiated from impacts to people's perception of those impacts by insisting that the analysis of visual impacts be separated into two different documents.
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7 9. Implemented consistently -- the procedure can be applied consistently among different projects, and individual assessments are consistent with the chosen procedure.
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8methods are without serious limitations. If an effective method for assessing visual impacts is going to be employed by state DOTs, it will need to be created based on the findings of this report.
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9 Best Practices The study identified 12 interrelated best practices that provide an administratively practical and scientifically defensible, professionally useful approach for conducting VIAs. The study found no existing VIA process that included all 12 best practices.
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