Highway Design Manual

The Highway Design Manual (HDM) establishes uniform policies and procedures to carry out the state highway design functions of the California Department of Transportation. Refer to the "Foreword" section of the HDM for more information.

Highway Design Manual Change Transmittals are posted by change date and include a summary of the significant changes. Implementation of the current version of the HDM shall be applied to on-going projects in accordance with HDM Index 82.5, unless otherwise noted on the Manual Change Transmittal memo or by separate Design Memo.

No matter which of the formats is used to download and/or print, if the HDM Holder chooses to do so, the Holder is responsible for keeping their electronic and/or paper copy up to date and current. For this reason, HDM Holders are encouraged to use the on-line version of the HDM for the most current design guidance.

Design Information Bulletins (DIB's) and Design Memoranda may supersede this manual.

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All HDM Chapters - Complete Download Version (Updated 12/14/2018) (PDF)

Table of Contents

Highway Design Manual (Chapters/Sections) Last Updated
Inside Cover (PDF) 7/2/2018
Foreword (PDF) 11/20/2017
Table of Contents (PDF) 12/14/2018
Chapter 10: Division of Design (PDF) 12/14/2018
Chapter 20: Designation of Highway Routes (PDF) 5/7/2012
Chapter 40: Federal-Aid (PDF) 12/30/2015
Chapter 60: Nomenclature (PDF) 7/2/2018
Chapter 80: Application of Standards (PDF) 12/14/2018
Chapter 100: Basic Design Policies (PDF) 12/14/2018
Chapter 200: Geometric Design and Structure Standards (PDF) 12/14/2018
Chapter 300: Geometric Cross Section (PDF) 12/14/2018
Chapter 400: Intersections at Grade (PDF) 12/14/2018
Chapter 500: Traffic Interchanges (PDF) 12/14/2018
Chapter 600: Pavement Engineering (PDF) 11/20/2017
Chapter 610: Pavement Engineering Considerations (PDF) 11/20/2017
Chapter 620: Rigid Pavement (PDF) 11/20/2017
Chapter 630: Flexible Pavement (PDF) 11/20/2017
Chapter 640: Composite Pavements (PDF) 12/30/2015
Chapter 650: Pavement Drainage (PDF) 12/30/2015
Chapter 660: Base and Subbase (PDF) 11/20/2017
Chapter 670: Tapers and Shoulder Backing (PDF) 7/2/2018
Chapter 700: Miscellaneous Standards (PDF) 12/14/2018
Chapter 800: General Aspects (PDF) 12/30/2015
Chapter 810: Hydrology (PDF) 12/30/2015
Chapter 820: Cross Drainage (PDF) 7/1/2015
Chapter 830: Transportation Facility Drainage (PDF) 7/1/2015
Chapter 840: Subsurface Drainage (PDF) 10/4/2010
Chapter 850: Physical Standards (PDF) 12/14/2018
Chapter 860: Open Channels (PDF) 3/7/2014
Chapter 870: Bank Protection - Erosion Control (PDF) 7/15/2016
Chapter 880: Shore Protection (PDF) 7/15/2016
Chapter 890: Storm Water Management (PDF) 9/1/2006
Chapter 900: Landscape Architecture (PDF) 12/14/2018
Chapter 1000: Bicycle Transportation Design (PDF) 7/2/2018
Chapter 1100: Highway Traffic Noise Abatement (PDF) 7/2/2018
Index (PDF) 7/2/2018