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Ontario Frost Laws, Seasonal Load Weight and Speed Restrictions – 2019

Last Updated: As of May 1st the last update was March 31, 2019

Restriction on permits

All annual and project overweight permits are not valid on any highways unless otherwise specified on the permit during:

  • March and April in Southern Ontario

  • March, April and May in Northern Ontario

For purposes of this restriction, the province is divided, west to east, by:

  • a line formed by the Severn River to Regional Rd. 169

  • Regional Rd. 169 from Washago to Hwy. 12

  • Hwy. 12, from Regional Rd. 169 to Hwy. 7, north of Sunderland

  • Hwy. 7, from Hwy. 12 to Regional Rd. 7B at Carleton Place

  • Regional Rd. 7B to Hwy. 15

  • Regional Rd. 29 to Arnprior

Single trip permits, for moving of overloads on highways not designated in Schedules 1, 2 and 3, may be issued, but are subject to axle controls established by the Ministry of Transportation.

Pursuant to The Highway Traffic Act, the Ontario Ministry of Transportation will impose reduced load limits for designated parts of the provincial highways between March 1 and April 30, for Schedule 1 and Schedule 2 roadways, and from March 1 to June 30 for Schedule 3 roadways.

Example of Spring Weight Restrictions for Ontario

5 tonnes (5,000kg) per axle where posted

Down from normal Highway Traffic Act standards

Ontario Load Restrictions (During Spring Thaw):

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