Saskatchewan Oversize Load Permits, Regulations & Axle Rules

Saskatchewan doesn't run daytime-only as a blanket rule. Night movement is allowed when the load carries the required marking and lighting: illuminated signs, amber beacons, and overhang lamps after dark. The hard limits are weather and calendar. Any load over 2.6 m wide must stop when visibility drops under 1,000 m, and the province's own guidance extends that to any load over 3.05 m wide or over 25 m long when visibility falls under 1,000 m or the highway turns slippery.

Restricted travel days are Sunday afternoons and public holidays. A direct crossing of a provincial highway is still allowed on those days if a flag person attends the crossing. The province doesn't publish a fixed calendar of affected dates in permit materials, so confirm specific holidays with the permit office when scheduling a run.

Spring-thaw weight reductions hit seasonally by ministerial order; a separate winter-weight season raises allowable axle weights the other direction. House trailers move at the wider 3.05 m allowance only between sunrise and sunset.

Farm equipment is the broadest carve-out. It may exceed legal size limits without a permit when operated or towed between sunrise and sunset, and the provincial weight rules don't apply to it at all. The only catch is it can't protrude into another lane on a designated highway unless permitted or actively passing.

Grain bins, hopper-cone bottoms, bin floors, livestock shelters, and loads of hay or straw all move on a flat $15 permit regardless of dimension. The same flat rate covers any move of 10 km or less. House trailers and mobile homes reach 3.05 m wide between sunrise and sunset; an over-length mobile home draws no length surcharge.

Auto-carriers run their own longer envelope: up to 24.55 m unloaded and 26.52 m loaded. Intercity buses and recreational vehicles reach 14 m, with three axles required past 12.5 m. Road construction, maintenance, and emergency equipment operate largely exempt while working inside a project.

Saskatchewan doesn't use the term "superload." The top tier is a structural-capacity review, and the trigger is weight: any load over 120,000 kg requires a minimum of two weeks' notice at application, because the Ministry of Highways needs time to review every bridge and structure along the requested route before issuing the permit.

This is a discretionary review, not an automatic denial. The ministry evaluates what the route can carry and issues the permit for non-divisible loads based on those capacities. No separate over-width, over-height, or over-length figure pushes a load into this tier. Weight is the only trigger.

Permits run through the SGI permit office acting for the Ministry of Highways, by phone, email, or fax. There's no public self-serve portal. Below this tier, routine overweight permits issue at posted tire-weight rates without the two-week structural review.

There's no carrier-completed route-survey form in Saskatchewan. The structural-capacity review is done by the permit office, not the driver. The triggering threshold matches the heavy-load tier: loads over 120,000 kg need the minimum two weeks' notice so the ministry can review bridge and highway capacities along the desired route before issuing.

All over-dimension travel is subject to structural clearance on provincial highways. Posted bridge or structure limits and active highway construction can restrict or reroute a move. A companion bridges-and-clearances publication handles the vertical and horizontal clearance check; for structures inside a city, contact that city's engineering department for current clearance numbers.

Routing gets settled as part of permit issuance, not after it. Expect the route to be part of what the office confirms when the permit comes back.

Saskatchewan has no police escort tier. Escorting is civilian: a single unit with two axles carrying the required signs, beacons, flagging gear, and two-way radio. Whether an escort is required at all, and whether it runs ahead or behind, is set as a condition of the individual permit rather than any fixed dimensional threshold in the regulations.

The RCMP is the provincial force, but its role here is enforcement only: stopping loads, checking dimensions, and confirming the permit is on hand. It doesn't escort.

When a preceding escort is ordered, it runs between 300 and 1,000 m ahead. A following unit stays within 300 m behind. Count, position, and spacing all come out of the permit conditions, so there's no fixed rule to plan around until the permit is in hand.