How to Ship Oversize & Overweight Loads in Ontario

Ontario figures verified against Ontario Ministry of Transportation (ontario.ca) · 2026-09· Last reviewed September 2026

Freight is legal in Ontario until it outgrows the province's size and weight envelope; from that point, movement runs on permits, marked vehicles, and rules about when and where the load may travel.

Ontario oversize thresholds

Width: over 8.5 ft needs a permit
Height: over 13.6 ft needs a permit
Weight: Gross and axle limits follow each province's weight tables; interprovincial MoU vehicles run to 62,500 kg on compliant configurations.
Length: over 53 ft needs a permit

Does your load need a permit here?

Skip the reading: enter your real dimensions and weight in the quote engine and it applies the thresholds of every jurisdiction on your actual route, prices permits and escorts where your load crosses the bands, and locks the price for 30 days.

Quote my load for Ontario →

Heavy equipment, vehicles, freight, containers: all categories priced.

From routine permit to superload in Ontario

Not every permitted load is the same size of problem. Ontario tiers them:

Routine permitted

The everyday oversize move: permit, marking, escorts by band.

Route-surveyed

Routine single-trip permits reach a long way: exceptional widths of 5 to 6 m on two-lane highways (up to 7 m on multi-lane) and weights to 120,000 kg move under a Weight and Load Engineer's approval; above that, consultant bridge engineering enters.

Superload

Ontario draws the superload line at any of: over 120,000 kg (264,500 lb) gross, over 5 m (16.4 ft) wide, or over 45.75 m (150 ft) long. Superloads need a Project Justification proving the move cannot shrink or go by rail or water, a Traffic Management Plan, Certified Superload Escorts, and for weights past 120,000 kg a ministry-approved bridge consultant's evaluation; approvals take days to two weeks.

Permits in Ontario: who issues them

Oversize and overweight permits are issued by the Ontario Ministry of Transportation Permit Issuing Office, through PRIO (Permit Road and Infrastructure Online); the permit office answers at 1-800-387-7736. Your carrier or its permit service deals with the office directly, and the cost is in your quote when your dimensions require it.

•Single-trip permits process in about 5 business days (apply at least 3, ideally 5, days ahead); annual permits take 10 to 15 business days.
•Fee scale: oversize-only single trip $66.25; overweight tiers $127.50 to $265.25 by distance up to 120,000 kg; over 120,000 kg $714; annual permit $448.75.
•Ontario permits only INDIVISIBLE loads: if splitting a load would not ruin its function or value and takes under 8 work hours, the province expects it split, not permitted.
•Dozer blades to 4.27 m may stay on, angled, with an escort from 4 m; wider blades come off before the move.
•Annual permits allow width to 3.7 m (3.85 m multi-lane), height 4.26 m, combination length 25 m, and overweight privileges to 63,500 kg.

The escalation ladder: from legal load to the move nobody makes

As dimensions grow, requirements stack in the same order everywhere; Ontario sets the exact trigger points.

1 · Legal load

Inside the envelope above: no permit, no escorts, travels any lawful hour. Typical: a 20 ft container on a flatbed, a pickup on a hotshot, pallets in a van.

2 · Permitted, no escort

Over the envelope but inside the province's first escort band: permit, banner and flags, daylight-type windows. Typical: a 10 ft wide skid-steer-and-attachments load on a step deck.

3 · One escort

From about 13.1 ft of width in Ontario: a certified pilot car leads on two-lane roads or follows on divided highways. Typical: a 12 ft wide dozer on an RGN.

4 · Two escorts / pole car

From about 15.1 ft wide in Ontario: front and rear escorts. Over 16 ft tall: a height-pole car proves every wire and bridge before the load reaches it.

5 · Police escort / superload

6 · Cannot move as one piece

Past what roads, bridges, and wires physically accept, or whenever the load is DIVISIBLE: authorities expect it reduced, not permitted. Booms come off, counterweights ship separately, buildings split into sections; the truly non-reducible goes to engineered transport, rail, or barge for part of the journey.

Ontario's escort grammar: no escort needed for widths 2.61 to 3.99 m; from 4 m one escort (front on two-lane roads, rear on multi-lane); from 4.6 m on two-lane highways, escorts front AND rear; overlength 36.76 to 45.74 m adds an escort, rear overhang past 4.65 m adds a rear escort; 4.87 m tall and up requires the height-pole car. From 5 m wide or 45.75 m long, escorts must be MTO-certified superload escorts.

Examples are typical industry scenarios for scale, not Ontario determinations; the permit for your move states the binding requirements.

Permits, escorts, and travel windows in practice

Above the envelope, Ontario issues single-trip permits against your exact declared dimensions, often with a prescribed route, and escort vehicles attach as width and length grow: one pilot car at the first band, two beyond it, and a height-pole car for the tallest loads. Daylight travel is the working default, with tighter windows in cities and on holidays. For how each piece works everywhere, see the guides on pilot cars & escorts, permits, travel windows and spring frost laws, which apply in Ontario's climate.

Reduced-load season applies on designated highways under HTA section 122: axle limits drop during spring thaw on posted schedules, and permit weights tighten with them.

Statutory-holiday movement is allowed only from half an hour before sunrise until noon, and only within 3.7 m width (3.85 m multi-lane), 25 m length, 4.26 m height, and 63,500 kg. Summer Fridays (3 pm to midnight) and Sundays (noon to midnight) carry seasonal bans for the biggest loads, and rush-hour windows close the Greater Toronto Area to permitted loads beyond the same thresholds.

Permits in Ontario are issued by the Ontario Ministry of Transportation Permit Issuing Office; your carrier or its permit service deals with the office directly.

Common questions

When does a load count as oversize in Ontario?▾

In Ontario, a load is oversize once it exceeds 8.5 ft in width, 13.6 ft in height, or the province's length limits; beyond those figures a permit is required before it moves.

Do I need to get the Ontario permit myself?▾

No. Movement permits attach to the carrier and vehicle, not to the shipper. When your dimensions require a Ontario permit, the carrier or its permit service obtains it, the cost is priced into your quote, and the paperwork rides in the cab.

Will my load need a pilot car in Ontario?▾

Escort requirements in Ontario begin around 13.1 ft of width, with two escorts from about 15.1 ft and a height-pole car for loads over 16 ft tall; road type changes the count, and the permit states the final requirement.

Can oversize loads travel at night or on holidays in Ontario?▾

Night moves are allowed with amber lamps and a retro-reflective D sign: oversize dimensions up to 3.05 m wide and 25 m long ride divided multi-lane highways only, while overheight/overweight moves to 4.26 m and 63,500 kg may use any King's highway. Nothing moves at night when winter road conditions, low visibility, or continuous-wiper weather prevail.

Related: heavy equipment shipping · all jurisdictions · other provinces: Quebec · British Columbia · Alberta · Manitoba · Saskatchewan · Nova Scotia

This guide is provided free, for general information, so shippers can see how oversize and overweight moves work. It is not legal advice and not a permit determination. Limits, escort bands, fees, and seasonal restrictions change regularly; before relying on any figure, verify it with the jurisdiction's transportation department or permit office, or a licensed permit service. When you book with LoadLoom, our dispatch desk and your assigned carrier confirm the current rules for your exact load and route; that confirmation, not this page, governs your shipment. LoadLoom is operated by ShipVista Corporation, licensed FMCSA freight forwarder FF-53801, USDOT 3852466. Last reviewed September 2026. Spot an error? Email customercare@loadloom.com with the official source and our desk will verify and update.