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... 1 S U M M A R Y The typical purpose of geometric design process is to provide the necessary threedimensional features for a roadway to address stakeholder-identified problems or needs by providing the appropriate level of mobility and/or safety improvements for all road users. Historically, the highway design process has followed AASHO, and then AASHTO, policies starting in the 1940s.
From page 2...
... 2 A Performance-Based Highway Geometric Design Process Additional knowledge gaps are identified as part of this research. A more robust range of definitions of land uses will address the requirements of the users and surrounding development that the roadway will serve.

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