MTO has issued some revisions to its Reduced Load (Spring Thaw) Restrictions.
See here for details: 2023 Spring Loads Restrictions March 13 2023_public
Up-to-date information about actual weight restrictions can be viewed at: https://511on.ca/list/seasonalloads and carriers who use the listed highways are encouraged to carefully monitor this website. The Ontario 511 interactive map also provides up-to-date visual information – choose map menu item “Truck and Bus info”, then check “Seasonal Loads”.