GDG Chapter 9 – Intersections offers design guidance on intersections including roundabouts, innovative intersections and at-grade railroad crossings; summarizes relevant human factor aspects; identifies an intersection planning and design process for relevant inputs and possible constraints; summarizes guidelines on intersection spacing, layout and alignment and sight distance needs; and outlines guidelines and design details for simple intersections, channelization, tapers, auxiliary and turning lanes.
TAC’s Geometric Design Guide for Canadian Roads (GDG) is a fundamental reference document for roadway design practitioners in Canada. It contributes to the development of regional, provincial and national road and highway systems by helping planners and designers meet the needs of road users with safety and consistency while addressing the context of local conditions and environments. The GDG addresses freeways, arterials, collectors and local roads in both urban and rural contexts, as well as special roads and facilities for walking and cycling.
The 11 chapters in the Geometric Design Guide for Canadian Roads are: 1 – Design Philosophy; 2 – Design Controls, Classification and Consistency; 3 – Alignment and Lane Configuration; 4 – Cross Section Elements; 5 – Bicycle Integrated Design; 6 – Pedestrian Integrated Design; 7 – Roadside Design; 8 – Access; 9 – Intersections; 10 – Interchanges; and 11 – Special Roads (added in 2020).
The GDG is complemented by the Canadian Roundabout Design Guide →
GDG overview webinar recording
Buying the GDG
- Each of the 11 chapters in the GDG is available individually in either print or e-book format at the cost of $59-$69 for TAC members, $75-$89 regular price, and a special rate of $39 (e-book only) for full-time students*.
- A package of all 11 chapters is sold in either print or e-book format for $575 for TAC members, $749 regular price, and a special rate of $225 (e-book only) for full-time students*.
*Full-time students must provide proof of eligibility. Email the TAC office your academic program name, course title, name of professor or dean, and copy of your student ID, for instructions. Call 613-736-1350 with questions.
Revisions
- Updates to technical content in chapters 2, 5, 7, 9 and 10 were included as of August 19, 2019. Summary of Revisions (pdf) →
- Chapter 11 was added in April 2020.
Disponible en français : Guide canadien de conception géométrique des routes (2017) : Chapitre 9 –Carrefours (2017)
