Connecticut OSOW Permits

Updated: Sep 2

Permits valid for three days.

Connecticut permitting system:

Contact phone number: 1-860-594-2880


Daylight only (one-half hour after sunrise to one-half hour before sunset), no weekends or holidays. Weekend travel is not allowed for overweight only loads. No moves from 6:30 to 9:00 a.m. or 4:00 to 6:00 p.m. Loads 13'6" wide or over 14' high can only travel Tuesday through Thursday, 9:00 a.m. to 4:00 p.m.


No travel on major holidays (New Year, Good Friday, Memorial Day, Independence Day, Labor Day, Thanksgiving, and Christmas). If a holiday falls on Monday, shut down is at 12:00 noon on Friday. For Thanksgiving and Christmas, shut down is at 12:00 noon on the day before the Holiday. Ask the Permit Office to verify, as these may be subject to change from year to year.


Width: 8'6"

Height: 13'6" (Note: CT will not issue a permit for overheight for any kind of a building.)

Length: 48' trailer. Note: 53' semi-trailer is legal on Interstate and Designated Highways if the distance between the kingpin and the center of the rear axle does not exceed 43'. (Kingpin setting does not matter on an O/D permit load).

Note: You can be fined $750 if you have a 53' semi-trailer traveling without a permit and kingpin setting over 43' if you are traveling empty unless the return trip is shown on your permit!

Overhang: Maximum overhang shall not exceed 1/3 the length of the load. Ask the permit office to verify.

Weight: 80,000 Gross Single – 22,400 Tandem – 36,000 Tridem – 42,500


Width: 16'

Height: 15' (Route survey required for height over 14'); 13'6” is the maximum height for any kind of building

Length: 120'

Weight: 5 Axles – 122,000 6 Axles – 130,000 7 Axles – 140,000.

Single – 22,400 Tandem – 40,000 Tridem – 60,000.

Connecticut does not go strictly by axle weights. They will go as high as 25,000 on a single, providing that the manufacturer’s rating is not exceeded and provided that the gross is within the limits stated above for 5, 6, or 7 axles.

Over 14' high requires a route survey.

Over 14' wide, 14' high or 120 long is considered a Super Load. Over 140,000 lbs. requires an engineer review.


Width: Over 12' – 1 escort on divided highways, 2 on undivided highways; over 13'6" – 2 escorts, 15' (over 14’11”) – 3 escorts.

Height: Over 14' – 1 escort with a pole (route survey required before ordering permit). Over 15'3" – 2 or more State Police escorts.

Length: Divided Highway over 100' – 1 escort, over 120' – 2 escorts.

Undivided Highway over 80' – 1 escort; over 100' – 2 escorts.

Overhang: Over 25' – 1 escort likely.


On loads up to 14' wide, the blade can remain attached. If weight can be reduced, it must be hauled separately. Connecticut does not issue permits for containers. Connecticut will not issue a permit of overheight on any kind of building.


"Oversize Load" signs are required on loads over 10' wide or 13'6" high. Over 4' of overhang must be flagged during the day and lighted at night. Flags are required on all corners of the permitted vehicle on any oversize or overweight load, and on widest points of wide loads.

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