A Policy on Geometric Design of Highways and Streets 6th Edition GDHS-6

A Policy on Geometric Design of Highways and Streets 6th Edition (GDHS-6) commonly referred to as "the Green Book," contains the current design research and practices for highway and street geometric design.

Developed by the Technical Committee on Geometric Design, a technical committee of the Subcommittee on Design, A Policy on Geometric Design of Highways and Streets 6th Edition provides guidance to highway engineers and designers who strive to make unique design solutions that meet the needs of highway users while maintaining the integrity of the environment. It is also intended as a comprehensive reference manual to assist in administrative, planning, and educational efforts pertaining to design formulation. Deisgn guidelines are included for freeways, arterials, collectors, and local roads, in both urban and rural locations, paralleling the functional classification used in highway planning. A Policy on Geometric Design of Highways and Streets 6th Edition is organized into the same functional categories to reflect the relationship between highway design and function.