Idle Reduction Weight Exemption
Any heavy-duty vehicle equipped with an auxiliary power unit or other qualified idle reduction technology may exceed the state gross, axle, tandem, or bridge formula weight limits by up to 550 pounds. To qualify for this exemption, drivers must be able to provide proof of the idle reduction technology’s weight through written certification. Drivers must also be able to prove through demonstration or certification that the idle reduction technology is fully functional at all times.
(Reference New Hampshire Revised Statutes 266:18-c)