Road restrictions and bans – Overview

Road restrictions

Find information about route restrictions due to dimensional constraints of highways because of overhead structures and bridge maintenance projects.

• Lane Restrictions List
• Directory of road authorities
• Restricted Bridge List for Provincial Highways
• Restricted Bridge List for Vehicles with Tridem Axles
• Vertical Bridge Clearances

Road bans

See a list of provincially banned roads in the Road Ban List (unofficial) document.

Current information on road bans on local roads in counties and municipal districts should be obtained through their individual offices.

Exemption permit

Road ban exemption permit applications can be completed by:

1. Filling out the Road Ban Exemption Permit Request form.
2. Submitting the form by email at [email protected] or by fax to 403-340-5278.

Seasonal weights

Seasonal weights for heavy haul are set according to the following schedule:

• Spring: weather dependant, subject to thaw depth readings of at least 25 cm and begins at same time as Period 1 weights for service rigs
• Post-Thaw: June 16 (may begin one week earlier or one week later)
• Summer: July 1
• Fall: September 1
• Winter: weather dependant, subject to frost depth readings of 75 cm or more.

Seasonal weights for service rigs are set according to the following schedule:

• Period 1: weather dependant, subject to thaw depth readings of at least 25 cm and begins at same time as Spring weights for heavy haul
• Period 2: June 16 (may begin one week earlier or one week later)
• Period 3: July 16
• Period 4: September 1

Commercial Vehicle Weight and Dimension Specification: Historical Seasonal Weight Changes.

Frost and thaw depths are monitored from a network of 70 frost probe stations throughout the province and used to determine the start of Spring/Period 1 seasons, Winter/Period 4 seasons and placement of thaw or frost line.

See placement of current frost or thaw line in the Frost/Thaw Contour Map.