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Saskatchewan Frost Laws

2020 Saskatchewan frost laws, seasonal load weight and speed restrictions.

The winter/spring season frost law restrictions will again be in in effect for many roadways in the Province of Saskatchewan this year according to information provided by the the provincial Ministry of Highways and Infrastructure. Typically, seasonal (spring) frost law restrictions that take effect in March.

Spring load restrictions on affected highways: The maximum load on steering axles is 10 kg per millimeter (560 lbs. per inch) width of tire (manufacturer’s stamped dimensions), to a maximum of 3 000 kg (6,612 lbs.) on each wheel but to a maximum of 5,500 kg (12 120 lbs.) on the steering axle; except for straight trucks on primary highways which are allowed up to a maximum of 7,250 kg (15,983 lbs.) on the steering axle with the appropriate tire size.

Maximum loads on all other wheels will be limited to 6.25 kg/mm (350 lbs. per inch) width of tire to a maximum loading of 1,650 kg per wheel (3,636 lbs.)

Maximum gross axle weights and tire sizes.

Colder temperatures during the winter months help freeze and strengthen roads. As a result more weight can be transported on provincial highways without damaging the road. This is a benefit to the trucking community.

The winter weight period that allows additional weight typically runs from November 16 through March 14. However, if weather remains mild the program may be postponed because without sufficient freezing, extra weight can damage pavement and the road beneath.

Winter Weights will not apply in the southwest area of the province until December 1 and will be removed on the last day of February due to historically milder climatic conditions.

Municipal roads are the responsibility of each rural municipality, who can set out their own weight limits. Weights can be restricted at any time by Minister’s order.

Saskatchewan is a large province with considerable difference in climate in the north and the south. The new change takes into account the climatic differences in the north and the south of the province while also maintaining the original intent of providing primary weight access for economic activities. In the north of the province, the annual weight increase on the 9-month primary highways will be same as before, from July 1 to March 31 of the following year. In the south of the province, the annual weight increase on the 9-month primary highways will occur earlier, from June 15 to March 15 of the following year. This change will help to sustain road conditions in the south, where spring thaw occurs earlier.

Additional information can be obtained by contacting the inquiry line: 1-866-933-5290 in Saskatchewan or 306-933-5290 outside the province.

Source: Spring Road Restrictions: https://www.saskatchewan.ca/business/transportation-and-road-construction/information-for-truckers-and-commercial-trucking-companies/regulations-and-road-restrictions/increased-weights-and-road-restrictions

Government of Saskatchewan, winter weight restrictions and spring frost law road bans and interactive road map:

http://publications.saskatchewan.ca/api/v1/products/87911/formats/104609/download

http://hotline.gov.sk.ca/restrictions_map.html

 

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Manitoba Frost Laws

2020 Manitoba frost laws, seasonal load weight and speed restrictions.

Manitoba Spring Road Restrictions (SRR) program.

The Manitoba Ministry of Infrastructure divides its province into three sections, with each section having a unique thaw restriction start and end date. In 2020, it will begin its spring road restrictions for Region A and Region B of the province at 6 a.m. on Friday, March 10. Weight restrictions are scheduled to end at 11:59 p.m. on Wednesday, May 31.

The allowable axle weights on weight restricted roads during the spring season are based on the percentages of the legal axle weights, with some exceptions for the single steer axles and in situations where essential commodities are being shipped. There are two levels of spring weight restrictions in Manitoba depending on the strength and surface conditions of the pavement structures. The Level 1 weight restriction applies to weak pavements while the Level 2 weight restriction applies to very weak pavements. The allowable axle weights on different axle configurations are calculated as follows:

Level 1 Spring Weight Restrictions:

  1. On a single steering axle of a single or tandem drive truck tractor:
    • 10 kg per millimeter width of tire up to a maximum of 5,500 kg on all highways.
  2. On a single steering axle of a straight truck or a tridem drive truck tractor:
    • Tire size 305 mm or less: 10 kg per millimeter width of tire up to a maximum of 5,500 kg on all highways.
    • Tire size greater than 305 mm: 9 kg per millimeter width of tire up to a maximum of 6,570 kg on all highways.
  3. On a tandem steering axle group of a straight truck:
    • 9 kg per mm width of tire multiplied by 0.90 (download factor) up to a maximum of 12,240 kg on RTAC Routes or Class A1 highways and up to a maximum of 9,900 kg on Class B1 highways.
  4. On all other axle groups:
    • 9 kg per millimetre width of tire up to a maximum of 90% of the legal axle group weights on all highways.

Level 2 Spring Weight Restrictions:

  1. On all single steering axles of all vehicle configurations:
    • 6.5 kg per millimeter width of tire up to a maximum of 65% of the legal axle weights on Class A1 and Class B1 highways.
  2. On a tandem steering axle of a straight truck:
    • 6.5 kg per millimeter width of tire multiplied by 0.90 (download factor) up to a maximum of 8,840 kg on Class A1 highways and up to a maximum of 7,150 kg on Class B1 highways.
  3. On all other axle groups:
    • 6.5 kg per millimeter width of tire up to a maximum of 65% of the legal axle weights on Class A1 and Class B1 highways.

Road restrictions for Region C, the northern most regions, will begin at 6 a.m. on Sunday, March 12, and end at 11:59 p.m. on Saturday, June 10. Region C is defined as the rest of the province north of the virtual line in Region B.

Spring Weight Restrictions are classified as Level 1 and Level 2 (see table below).

Example of Maximum Allowable Axle Weights. Level 1 Spring Weight Restriction, Reduce Axle Weights to 90% Maximum Allowable Weights. Level 2 Spring Weight Restriction, Reduce Axle Weights to 65% Maximum Allowable Weights. A complete list of Charts of Allowable Axle Weights can be found at the following link: http://gov.mb.ca/mit/srr/restrictions.html

Manitoba Spring Road Restrictions Program:

Source: http://www.gov.mb.ca/mit/srr/

Manitoba publishes a list of road bans as conditions change. Go to the above link and look for “Road Bans” in the left column. These bans identify specific roadways and the ban imposed in percent of rated axle capacity.

It is important for truck drivers and trucking company dispatchers to make certain they are operating in accordance with the Manitoba posted frost laws, seasonal load weight and speed restrictions that are posted. Changes to these restrictions is subject to change hourly during the winter and spring months. You are expected to be aware of these changes and operate accordingly. It is possible that heavy fines may be levied as well as your truck being ordered out of service and not permitted to travel. We suggest you bookmark this page for future reference.

Seasonal weight restrictions limit the maximum weight of vehicles allowed to travel on certain roads as a way to help prevent damage and protect public investment in the roadways.

Learn about frost laws in other Canadian provinces.

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