Highway Design Manual
The Highway Design Manual (HDM) has been revised with the 6th Edition HDM Change 12/16/16. Changes include FHWA's revision from 13 to 10 controlling criteria for design as well as revised superelevation, comfort speed, and horizontal curvature guidance from the AASHTO publication, "A Policy on Geometric Design of Highways and Streets" (2011). Also included is revised guidance related to airway-highway clearances, bridge barriers and railings, roundabouts, ramp metering, and water and resource conservation. Clarifications were included related to curb ramps and necessary highway features within the clear recovery zone as well as errata that reflect current nomenclature.
The latest English Version of the HDM is available on-line below in two formats.
The first format available is a PDF file of the complete manual which will allow you to perform word searches of the complete manual and/or allow you to download or print the complete HDM cover to cover all at one time.
A second format available in Metric, PDF Metric complete manual also allow you to perform word searches of the complete manual in Metric units.
The HDM is available for purchase through the Caltrans Publication Unit . If this option is chosen, the HDM Holder and not the Publications Unit is responsible for obtaining and inserting all of the change-sheets that are available on the Department Design website.
Please note, implementation of the current version of the 6th Edition HDM available below 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 versions of the HDM for the most current design guidance.
|Chapter Name||Last Updated|
|Expanded Table of Contents||TOC||12-16-16|
|Division of Design||Chapter 10||12-30-15|
|Designation of Highway Routes||Chapter 20||05-07-12|
|Application of Design Standards||Chapter 80||12-16-16|
|Basic Design Policies||Chapter 100||12-16-16|
|Geometric Design and Structure Standards||Chapter 200||12-16-16|
|Geometric Cross Section||Chapter 300||12-16-16|
|Intersections At Grade||Chapter 400||12-16-16|
|Traffic Interchanges||Chapter 500||12-16-16|
|Pavement Engineering||Chapter 600||11-02-12|
|Pavement Engineering Considerations||Chapter 610||11-02-12|
|Rigid Pavement||Chapter 620||11-02-12|
|Flexible Pavement||Chapter 630||05-07-12|
|Composite Pavements||Chapter 640||12-30-15|
|Pavement Drainage||Chapter 650||12-30-15|
|Base and Subbase||Chapter 660||12-30-15|
|Tapers and Shoulder Backing||Chapter 670||12-30-15|
|Miscellaneous Standards||Chapter 700||12-30-15|
|General Aspects||Chapter 800||12-30-15|
|Cross Drainage||Chapter 820||07-01-15|
|Transportation Facility Drainage||Chapter 830||07-01-15|
|Subsurface Drainage||Chapter 840||10-04-10|
|Physical Standards||Chapter 850||12-30-15|
|Open Channels||Chapter 860||03-07-14|
|Bank Protection - Erosion Control||Chapter 870||07-15-16|
|Shore Protection||Chapter 880||07-15-16|
|Storm Water Management||Chapter 890||09-01-06|
|Landscape Architecture||Chapter 900||12-16-16|
|Bicycle Transportation Design||Chapter 1000||12-16-16|
|Highway Traffic Noise Abatement||Chapter 1100||12-30-15|
If you have any questions about the Highway Design Manual, please contact David.Cordova@dot.ca.gov.
Statewide Alerts and Other Information
Division of Design Offices
California Department of Transportation
Division of Design
P. O. Box 942874
Sacramento, CA 94271-0001