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Special Roads: A New Chapter for the Geometric Design Guide for Canadian Roads

Ce webinaire a été offert en anglais.

A new chapter on Special Roads has been added to TAC’s Geometric Design Guide for Canadian Roads. This webinar reviewed the chapter’s content and development, and offerred advice for practitioners who face different road material types across Canada.

14 mars 2024


  • Heuristics from the 1999 GDG
  • Human factors
  • Special road classification system
  • Design tables extended
  • Roadside safety
  • References to 2017 GDG added
  • Road types added
  • Braking on road surfaces other than asphalt
  • Superelevation tables for standard 3% added
  • Other resources


Henning Buch, Jacobs

Henning Buch is the author of the new GDG chapter on Special Roads. He is a senior design technologist with almost four decades of experience in civil engineering design and construction, with particular expertise in highway design, roadside safety and railway design.

He has been a member of TAC’s Geometric Design Committee since 2009, and chairs the Revisions and Additions Subcommittee.

The Transportation Association of Canada (TAC) makes no representations or warranties about the accuracy or suitability of any information presented in the webinars and related materials (such as handouts, presentation documents and recordings); all such content is provided to TAC’s members and webinar registrants on an ‘as is’ basis. TAC is not liable for any information provided by instructors and presenters of these webinars. TAC hereby disclaims all liability for any claims, losses, or damages in connection with use or application of these materials. TAC does not guarantee, warrant, or endorse the products or services of any firm, organization, or person. The information contained in these webinars and related materials is not intended to constitute legal advice or the rendering of legal, consulting, or other professional services of any kind. Users of these materials should not in any manner rely upon or construe the information or resource materials in these materials as legal, or other professional advice and should not act or fail to act based upon the information in these materials without seeking the services of a competent legal or other professional.