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Pages 3-4

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From page 3...
... 3 The design of a highway -- its three-dimensional features (horizontal alignment, vertical alignment, and cross section) and appurtenances to provide for drainage, traffic control, and safety -- requires a well-defined process.
From page 4...
... 4 a performance-Based highway Geometric Design process have begun using an expanded array of roadway functional classifications as a basis for selecting certain design criteria. An assessment of the current design process is needed to ensure that recent advances in knowledge [e.g., the AASHTO Highway Safety Manual (HSM)

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