RSA 1980 cH-7 s44
Other Equipment
Horn, etc.
45(1) Every motor vehicle, motor cycle, moped, power bicycle
and bicycle shall be equipped with an adequate horn, gong or bell
and it shall be kept in good working order and shall be sounded
whenever it is reasonably necessary to warn persons on or
approaching the highway in the vicinity of the vehicle or motor
cycle, moped, power bicycle or bicycle.
(2) No person having the control of a motor vehicle, motor cycle,
moped, power bicycle or bicycle shall use the horn, gong, bell or
other signalling device on it except for the purpose of giving notice
to persons on or approaching the highway in the vicinity of the
motor vehicle, motor cycle, moped, power bicycle or bicycle of the
approach of the vehicle, and in so doing shall not make any more
noise than is reasonably necessary for the purpose of giving the
warning.