1508                             Laws of Maryland                       Ch. 534

(2)    Vehicles of city, county, state or federal fire departments or
duly constituted volunteer fire departments or rescue squads may be
equipped with or display red and/or white lights or signal devices.

(3)    Ambulances may be equipped with or display red and/or
white lights or signal devices.

(4)    Authorized service vehicles, rural letter carrier, slow moving
farm vehicles and tow trucks may be equipped or display yellow or
amber lights or signal devices.

(5)    Said blue, red, or white lights or signal devices may only be
flashed or oscillated or otherwise used while enroute to, at the scene
of, or returning from an emergency and shall not relieve the au-
thorized emergency vehicle from otherwise giving an audible warning
as required elsewhere in this Article.

(6)    Such yellow or amber lights or signal devices permitted on
vehicles set out in subsection (c) (4) above shall only be flashed or
oscillated or otherwise used in the course of its official duties, to
indicate to the public that it is a slow moving vehicle or is otherwise
impeding traffic.

(7)    In addition to the penalties provided in Section 17-101 (b)
any person convicted of a violation of Section 12-218 shall have his
driving privileges suspended for a period of thirty (30) days, and
the registration of such vehicle shall be suspended for a period of
thirty (SO) days, notwithstanding that the owner of such vehicle
may not be the operator at the time of the offense, unless said owner
proves to the satisfaction of the Department that he had no control
over the use or display of a light or signal device and could not
prevent the violation of this Section.

(d)    A police vehicle when used as an authorized emergency
vehicle may but need not be equipped with the flashing red lights
specified herein.

(e)    The flashing lighting described in subsections (b) and (c)
of this section shall not be used on any vehicle other than an au-
thorized emergency vehicle, service vehicle or school bus.

(f)    The use of the signal equipment described herein shall im-
pose upon drivers of other vehicles the obligation to yield right of
way and stop as prescribed in sections 11-405 and 11-707 of this
article.

§ 12-218.1. Rural letter carrier's warning device.

(a)    Any rural letter carrier's motor vehicle may be equipped
with a warning device which may be used for the purpose of warn-
ing the operators of other vehicles of the presence of a vehicular
traffic hazard requiring the exercise of unusual care in approaching,
overtaking, and passing, and when so equipped may display the
device in addition to any other warning signal required or per-
mitted by law.

(b)    The warning device shall include two bi-directional lights
mounted at each side of the vehicle upon the roof, with two amber
lenses facing the rear and two amber lenses facing the front. Each
light shall be not less than four inches in diameter and shall be