Crossing Solutions at Roundabouts and Channelized Turn Lanes for Pedestrians with Vision Disabilities: A Guidebook (2017) / Chapter Skim
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6C H A P T E R 2 Design Process This chapter presents an overall design process for roundabouts and CTLs that fully integrates accessibility. The design process is iterative in nature, as a design may need to be revised throughout its development to achieve a desirable performance.
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Note: The chapter and section numbers in this figure refer to NCHRP Report 672. Figure 2-1.
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8 Crossing Solutions at Roundabouts and Channelized Turn Lanes for Pedestrians with Vision Disabilities: A Guidebook The performance checks outlined in NCHRP Report 672 can be characterized as follows, with the means to conduct each check given in parentheses: • Achieve acceptable operational performance (lane numbers and arrangements check) , • Achieve acceptable safety performance (fastest path, path alignment, and sight distance/ visibility checks)
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Design Process 9 Figure 2-2. Channelized turn lane design process.
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