Mobile/modular homes
134 facts from 3 places, each quoted from the agency that sets it.

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General
19 topics
Maximum length (Measures)
Maximum permitted overall length of the vehicle or combination of vehicles, including load and equipment, as authorized by the special permit.
Maximum height (Measures)
Maximum permitted overall height of the vehicle, including load and equipment, as authorized by the special permit.
Maximum width (Measures)
Maximum permitted overall width of the mobile/modular unit and trailer, inclusive of roof overhang, measured in metres.
- New York4.88 to 4.88 m (16′ to 16′)
General rule 4.88 m (16′), with 3 other cases.
- Ontario2.6 to 4.99 m (8′ 6.5″ to 16′ 4.5″)
General rule 2.6 m (8′ 6.5″), with 7 other cases.
Not stated in Quebec.
Maximum rear overhang (Measures)
Maximum permitted distance by which the load or equipment may project beyond the rear of the vehicle, measured in metres.
Not stated in New York.
Maximum body width (Measures)
Maximum permitted width of the body of a mobile home or prefabricated building, excluding roof projections, measured in metres.
- New York4.27 m (14′)
For mobile/modular unit and trailer.
- Quebec4.3 m (14′ 1.5″)
Across 2 cases, each with its own conditions.
Not stated in Ontario.
Mobile home permit required (Yes or no)
Whether a permit is required to transport a mobile home or prefabricated building.
Not stated in Ontario.
Maximum attachment projection (Measures)
Maximum additional width permitted beyond the width stated on the permit for attachments such as door knobs and running lights, measured in metres.
- New York0.08 m (3″)
For mobile home width 14 feet or less.
- Quebec0.1 m (4″)
Across 2 cases, each with its own conditions.
Not stated in Ontario.
Maximum eave overhang on one side (Measures)
Maximum permitted total eave overhang on one side of a mobile home or modular building unit, measured in metres, provided the greater overhang is on the right-hand shoulder side of the highway.
- New York0.15 m (6″)
Across 2 cases, each with its own conditions.
- Quebec0.45 m (1′ 5.5″)
Across 2 cases, each with its own conditions.
Not stated in Ontario.
Towing equipment
4 topics Open Towing equipment
Maximum undercarriage width (Measures)
Maximum permitted width of the undercarriage of a mobile home, measured from outside of tire to outside of tire, in metres.
- New York2.59 m (8′ 6″)
Not stated in Ontario and Quebec.
Minimum number of undercarriage axles (Measures)
Minimum required number of axles on the undercarriage of a mobile home or modular building unit.
- New York4
Across 2 cases, each with its own conditions.
Not stated in Ontario and Quebec.
Minimum towing vehicle GVWR (Measures)
Minimum required gross vehicle weight rating (GVWR) of the towing unit used to tow a mobile home or modular building unit, measured in kilograms.
- New York11,340 to 11,340 kg (25,000 lb to 25,000 lb)
Across 2 cases, each with its own conditions.
Not stated in Ontario and Quebec.
Warning equipment
5 topics Open Warning equipment
Roof included in width for night restrictions (Yes or no)
Whether a prefabricated building's roof is included when measuring width for night-travel restrictions.
Not stated in Ontario.
Warning lights replace rear escort conditions (In words)
Conditions under which warning lights may replace a rear escort for a prefabricated building on a divided highway.
- New York
The use of a certified escort vehicle in the rear in lieu of a warning sign may be required if the use of such vehicle would provide more effective warning or would be more convenient to the permittee.
Not stated in Ontario and Quebec.
Minimum warning sign height above ground (Measures)
Minimum required height above the ground of the warning sign attached to the rear of a mobile home or modular building unit, measured in metres.
- New York1.52 m (5′)
Across 2 cases, each with its own conditions.
Not stated in Ontario and Quebec.
25 air mile radius permits
3 topics Open 25 air mile radius permits
Maximum width under 25 air mile radius permit (Measures)
Maximum permitted width of a manufactured home or vehicle combination operating under a 25 air mile radius permit, measured in metres.
- New York3.05 to 4.88 m (10′ to 16′)
General rule 3.66 m (12′), with 8 other cases.
Not stated in Ontario and Quebec.
Maximum length under 25 air mile radius permit (Measures)
Maximum permitted length of a manufactured home or vehicle combination operating under a 25 air mile radius permit, measured in metres.
- New York21.9 m (72′)
General rule 21.9 m (72′), with 7 other cases.
Not stated in Ontario and Quebec.
Maximum gross weight under 25 air mile radius permit (Measures)
Maximum permitted gross weight of a vehicle combination operating under a 25 air mile radius permit, measured in kilograms.
- New York33,239 to 61,235 kg (73,280 lb to 135,000 lb)
Across 8 cases, each with its own conditions.
Not stated in Ontario and Quebec.
Where the comparisons come from
- Subpart 154-1 — Nondivisible Load Permits; Table of Fees (Perm 43)(opens in a new tab)
www.dot.ny.gov, PDF, 48 facts
- Guide to oversize/overweight vehicles and loads(opens in a new tab)
www.ontario.ca, web page, 29 facts
- Guide du Règlement sur le permis spécial de circulation(opens in a new tab)
www.transports.gouv.qc.ca, PDF, 16 facts
- C-24.2, r. 35 — Règlement sur le permis spécial de circulation(opens in a new tab)
legisquebec.gouv.qc.ca, web page, 14 facts
- New York State Certified Escort Manual 2025(opens in a new tab)
www.dot.ny.gov, PDF, 14 facts
- Information Concerning Special Hauling Permits, PERM 30(opens in a new tab)
www.dot.ny.gov, PDF, 13 facts