2010 Manitoba Spring Road Restrictions (SRR)

Restriction Levels

The Spring Road Restriction levels are based on percentage loading formulae that are simpler and easier to use. Two restriction levels provide higher truck loading where possible and protect pavements where necessary. Exceptions to these restrictions will be made only for steering axle weights and Essential Commodities as described below. A Maximum Allowable Weight Table is included in this page to show examples of allowable loading for each restriction level.

Single Axle and Axle Groups

Load restriction levels for all axle units, except steering axles in certain situations, are expressed as a percentage of normal loading for each highway class:

Level 1 Restrictions:

• RTAC Routes, class A1 & B1 Highways: 90 % of normal axle loads

Level 2 Restrictions:

• class A1 & B1 Highways: 65 % of normal axle loads

Tire size allowable weight information is available here:

• Level 1 RTAC Route 90% (PDF)
• Level 1 class A1 90% (PDF)
• Level 2 class A1 65% (PDF)
• Level 1 class B1 90% (PDF)
• Level 2 class B1 65% (PDF)

Steering Axles

To address technological changes, such as set back steering axles, the allowable weights for steering axles are as follows:

Level 1 Restrictions:

• Normal loading of 10 kg/mm of tire width to a maximum of 5,500 kg will be allowed.

Level 2 Restrictions:

• When transporting Essential Commodities, normal loading of 10 kg/mm of tire width to a maximum of 5,500 kg will be allowed, in accordance with Essential Commodities provisions. Trucks returning empty from these deliveries can do so any time. A list of Essential Commodities is provided for quick reference in the last section of this page. 
• All other vehicles and commodities will be subject to the Level 2 restriction of 65% of normal loading for all axles including the steering axle.

 

MAXIMUM ALLOWABLE WEIGHTS (in kilograms)1
Example for Truck-Tractor and Semi-Trailer with 280 mm/11 inch Tires
Axle Loading	Steering Axle	Single Axle	Tandem Axle	Tridem
RTAC 90% (normal)	5,500 (5,500)	8,190 (9,100)	15,300 (17,000)	20,700 (23,000)
A1 90% (normal)	5,500 (5,500)	8,190 (9,100)	14,400 (16,000)	20,700 (23,000)
A1 65%	3,575	5,915	10,400	14,950
B1 90% (normal)	5,500 (5,500)	7,380 (8,200)	13,050 (14,500)	18,000 (20,000)
B1 65%	3,575	5,330	9,425	13,000
1 Detailed maximum allowable weight tables are available above.