How do SPIF vehicles improve industry productivity?
As SPIF semi-trailers are equipped with self-steering axles and load-equalization, MTO has determined that there is no longer a need to apply special restrictive weights to aggregate vehicles that meet the SPIF standards. The method of calculating the allowable gross weight of SPIF tractor-trailers is therefore the same regardless of product being carried. SPIF vehicles include a number of productivity improvements. All SPIF semi-trailers have a standardized maximum length of 16.2m (53′). All SPIF combinations may be equipped with additional lift-axles for deployment in other jurisdictions. Tandem and tridem axle weight increases have been extended to double trailers to further improve harmonization of rules with Quebec and the Atlantic provinces. Tri-drive tractors have been introduced for situations where greater traction is needed. Axles equipped with wide single tires are allowed up to 9,000 kg provided their weight does not exceed 10 kg per mm of tire width.
