This consultation was open from:
September 16, 2026
to October 14, 2026
Proposal summary
Updated edition of the MTO Design Supplement to the TAC Geometric Design Standards for Canadian Roads.
Proposal details
Major updates include clarification on design for 110 km/h posted speed; procedure for determining the requirement for left turn lanes at unsignalized intersections with less than 5% turning volume; reinstating guidance from the GDSOH on design of speed change lanes; and revision of Appendix 13 work zone design to remove conflicts with OTM Book 7. Full list of updates is detailed in the Record of Revisions.
Due to file size limitations, the manual is split into 11 PDF files.
Comment
Commenting is now closed.
The comment period was from September 16, 2026
to October 14, 2026