1066 LAWS OF MARYLAND. [CH. 520

an abrupt sound sufficiently loud to serve as an adequate
warning of danger, but no person operating any motor ve-
hicle shall make or cause to be made any unnecessary noise
with such bell, horn or signaling device, or use the same ex-
cept as a warning of danger, and such, signaling device shall
not be sounded while passing a horse or other animal in the
open country. Within the limits of cities, towns and villages,
loud sounding signaling devices shall not be used during the
period from one hour after sunset to one hour before sunrise,
unless absolutely necessary to avoid accidents. An adequate
signaling device shall in all cases be sounded on approaching
curves, tops of hills and intersecting highways in the open
country where the operator's view is obstructed.

(2-A) Mirrors. Every commercial motor vehicle not
equipped with pneumatic tires, and every commercial motor
vehicle so constructed or loaded that the operator is prevented
from having a free and unobstructed view of the highway im-
mediately to the rear and at the sides of the same, shall be
equipped with a mirror or reflector attached to and so located
and adjusted on such vehicle as to give the operator thereof a
clear reflected view of the highway to the rear of such vehicle.
It shall be the duty of the owner of such motor vehicle to
equip the same with a mirror or reflector as aforesaid, and see
that the same is maintained on such vehicle, and of the oper-
ator thereof at all times to see that such mirror or reflector is
kept in proper adjustment as aforesaid. The failure of either
to do as above required shall be a misdemeanor, punishable by
a fine of not less than one dollar ($1. 00) nor more than fifty
dollars ($50. 00) for the first offense.

(3) Lights. Every vehicle, including motor vehicles and
horse drawn vehicles, operated or driven on the public high-
ways of the State, at any time when there is not sufficient
daylight to render clearly discernible a person, vehicle or
other substantial object on the highway at a distance of two
hundred (200) feet ahead, shall be provided with lights, as
hereinafter provided of sufficient power and so adjusted
and operated as to enable the operator or driver to pro-
ceed with safety to himself and other users of the high-
ways under all conditions of light, road and weather, pro-
vided, however, that the following classes of vehicles shall
display under the above conditions not less than the lights
next specified, to wit: