This 2021 Edition of the Roadway Engineering Group Roadway Design Guidelines supersedes the 2012 Edition and incorporates the 2014 revisions along with several new revisions affecting bicycle and pedestrian accommodations, passing sight distance, barrier treatments, land and shoulder widths, fencing, design vehicles, and detours. New and significantly revised sections are listed in the "Revisions and Amendments" section of the on-line manual. Includes revisions through January 2025.
Arizona Department of Transportation. 2021. Roadway Design Guidelines. Rev Jan 2025. Phoenix, Arizona: Roadway Engineering Group, Arizona Department of Transportation. January.
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