Rhode Island OSOW permits

Updated: Sep 2

Permits valid for five days.

Rhode Island permitting system: https://www.ri.gov/DOT/osow/users/sign_in

Contact phone number: 1-401-563-4582


Travel permitted one-half hour before sunrise to one-half hour after sunset. No weekend travel permitted.


No travel on major holidays and on VJ Day (2nd Monday in August). Movement may be restricted after 12:00 noon the day before a holiday. Check with the Sammons Permit Office.


Width: 8'6"

Height: 13' 6"

Length: Interstate and designated highways - 53' semitrailer (kingpin to centerline of rear axle group must not exceed 41'), other roads 48' semitrailer.

Overhang: 3' front, 6' rear

Weight: 80,000 Gross Single – 22,400 Tandem – 36,000 Tridem – 42,000 with axles spacings less than 4'6", 42,750 with 4'6"


Width: *

Height: *

Length: *

*Determined by routes and dimensions

Weight: determined by spacings, usually 22,500 per axle is permitted. 5 Axles 6 Axles or 7 Axles – depends on spacings, weight, and routing Over 200,000 pounds, an outside engineering firm must survey the routes.


Width: Over 12' – 1 escort, over 14'6" – 2 escorts

Height: Over 14' – 1 escort

Length: Over 80' – 1 escort, over 90' – 2 escorts

Overhang: Over 15' – 1 escort

Note: Some metropolitan areas may require police escorts


Vehicles hauling poles, pipes, and other material of a structural nature that cannot be separated or readily dismembered do not need a special hauling permit unless the overall length exceeds


Warning signs are required for all oversize movements. “Oversize Load” signs are to be displayed on the front of the vehicle and on the end of the load for all loads exceeding legal width, length, or rear overhang. Wide loads require at least two flags and up to six flags mounted at the widest extremities. Overlength vehicles/loads require one flag if the load is less than 2' wide, and two flags if the load is greater than 2' wide. Less than 2' of overhang requires one flag; greater than 2' of overhang, two flags required, one on each corner.

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