A Policy on Geometric Design of Highways and Streets

Review of the book
This is known as the Highway Design Reference Book, known in the transportation community as AASHTO. This book is based on American roads, but it is used in many countries, including Iran, with slight changes for the roads of other countries. This book is the 2001 edition and a new edition is published every few years according to changes in relations.

Table of Contents
The topics covered in this book are as follows.

Highways
Design criteria and controls
Design elements
Cross-sectional elements
Local streets and roads
Streets and collectors and distributors
Urban and rural arteries
Freeways
Level intersections
Non-level intersections