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🏛️Federal & Industry Standards
AASHTO Policy on Geometric Design of Highways and Streets (Green Book)
WebMississippi Department of Transportation (MDOT)2017 Standard Specifications
The definitive guide to geometric highway design covering horizontal and vertical alignment, cross sections, intersections, and interchanges. Commonly known as the "Green Book," it provides the design criteria referenced by virtually all state DOT design manuals.
Published by AASHTO. 8th Edition, 2023.
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