New Hampshire State Regulations

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Please Note! This chart is for informational purposes only, mostly for interstate routes. You may still require escorts for smaller dimensions as well depending on the route you take, rear overhang and downtown areas. Always read your permits and provisions sheets carefully.

New Hampshire

New Hampshire DOT

Phone#:

(603) 271-2691

Email:

nhdotpermits@dot.nh.gov

Fax#:

(603) 271-6084

Hours:

8am-3:45pm Mon-Fr

Operating Time

One-half hour before sunrise to one-half hour after sunset, Monday through Friday. No weekend or holiday travel for overdimensional loads. Overweight only are not restricted for travel time.

Legal Dimensions

Length:

53' trailer

Width:

8'6

Height:

13'6

Overhang:

NO overhangs on 53 trailer (41′ Kingpin to center of rear tandem)

Weight:

Gross:80.000

Single:20,000 designated highways (22,400 other roads)

Tandem:34.000

Tridem:34.000

Weight Limits

Gross:

determined by the NH DOT

Single:

25.000

Tandem:

50.000

Tridem:

70.000

Notes:

A bridge review required for any 5-axle combination exceeding 100,000 pounds, any 6-axle combination exceeding 120,000 pounds.

Escort Conditions

Length:

at 80 - 1 escort

Single:

at 12′ – one escort

Height:

To be determined by the NH DOT

Notes:

Route survey may be required for over 13′-6″ high, escort not usually required for height.