New Hampshire oversize permits are valid for five travel days. Must have the overweight permit prior to entering the state.
Travel is allowed one-half hour before sunrise to one-half hour after sunset, Monday through Friday. No weekend or holiday travel for over dimensional loads. Overweight only are permitted continuous travel.
Travel through the city of Manchester is restricted during the hours of 7:00 a.m. – 9:00 a.m. and 3:00 p.m. – 6:00 p.m. Toll road requirements are the same as other highways. No travel on major holidays, including some holiday weekend restrictions.
Maximum posted limits unless otherwise specified on permit.
* When GVW isn’t over 73,280 pounds, 22,440 pounds legal on a single axle, and 36,000 on a tandem
Loads exceeding these dimensions are treated as super loads.
A bridge review is required when: any single axle exceeds 27,500 pounds, any axle of a tandem exceeds 25,000 pounds, any axle of a tridem exceeds 22,500 pounds, any axle of a quad exceeds 20,000 pounds, any 5-axle combination exceeds 100,000 pounds, any 6-axle combination exceeds 120,000 pounds, any 7-axle combination exceeds 130,000 pounds, any combination of 8 or more axles exceeds 149,999 pounds.
“Oversize Load” sign required on front of an oversize vehicle and on the rear of the vehicle or load, whichever provides the best rear display. Mount red flags (at least 12″ square) on all extremities of the load when load extends over sides of trailer more than 4 inches. When rear overhang exceeds 4′, 1 flag shall be displayed at the end of the overhang if less than 2′ wide and 2 flags if the overhang is over 2′ wide. There are no special lighting requirements.