======A Policy on Geometric Design of Highways and Streets======

A publication of the [[american-association-of-state-highway-and-transportation-officials|American Association of State Highway and Transportation Officials]] that provides, among other things, recommendations for the widths of street, road, and highway lanes. It is colloquially called "The Green Book".

[[https://store.transportation.org/item/collectiondetail/180|7th Edition (purchase page)]]

[[https://www.kittelson.com/ideas/aashto-green-book-8th-edition-to-reflect-shifts-toward-multimodal-transportation/|Article about the forthcoming 8th edition]]