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Published in:
2024 | OriginalPaper | Chapter
6. The Highway Capacity Manual (HCM) and Its Methods
Author : Lily Elefteriadou
Published in: An Introduction to Traffic Flow Theory
Publisher: Springer International Publishing
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Abstract
The Highway Capacity Manual (HCM) is a major reference document used in traffic analysis throughout the United States and worldwide. The HCM has been providing techniques for estimating capacity and assessing the traffic operational quality of transportation facilities for over 70 years. It is published by the Transportation Research Board of the National Academies of Sciences, Engineering, and Medicine and provides analytical tools for evaluating various types of transportation facilities such as freeways, arterials, and intersections. Since its first publication in 1950, it assists transportation professionals with traffic engineering decisions, highway design considerations, and transportation planning estimates. Through all its editions, the role of the HCM has been to provide uniform standards related to: