Marvin Mandel, Governor                        1509

powered by a bulb of not less than 21 candle power, with reflector-
ization sufficient to assure visibility for at least 500 feet in front
of and to the rear of the vehicle. The lights shall be wired with
one "on-off" switch and one "flashing'' switch, which shall activate
both lights simultaneously, and which may be wired to operate
from the vehicle's stop light switch.

(c)    Between each light on the assembly of the device a sign
shall be mounted with the words "U. S. Mail" in black letters on a
white background, facing both to the front and to the rear. The
lettering on the sign shall be not less than four inches in height,
and the width of each stroke shall be not less than three-fourths of
an inch. The sign shall be constructed to permit it to be folded
down out of vision when not in use.

(d)    The warning device may be used only during the discharge
of a rural letter carrier's official duties. Prior to the first stop on
the route and following the last one the lights shall be darkened and
the sign folded down out of vision.

(e)    The warning device may not be installed or operated until
an application has been submitted to and approved by the depart-
ment. The application shall be made by the individual rural letter
carrier on forms furnished by the department.

§ 12-218.2. Amber lights on tow trucks escort and maintenance
vehicles.

One or more amber flashing lights may be displayed by a tow
truck while at the scene of an accident or a disabled vehicle, or
while towing a vehicle, and also by snow removal and other highway
maintenance and service equipment and escort vehicles.

§ 12-219. Signal lamps and signal devices.

(a)    Any vehicle may be equipped and when required under this
article shall be equipped with a stop lamp or lamps on the rear of
the vehicle which shall display a red or amber light, or any shade
of color between red and amber, visible from a distance of not less
than 300 feet to the rear in normal sunlight, and which shall be
actuated upon application of the service (foot) brake, and which
may but need not be incorporated with one or more other rear lamps.

(b)    Any vehicle may be equipped and when required under sec-
tion 12-206(b) shall be equipped with electric turn signals which
indicate an intention to turn by flashing lights showing to the front
and rear of a vehicle or on a combination of vehicles on the side of
the vehicle or combination toward which the turn is to be made.
The lamps showing to the front shall be mounted on the same level
and as widely spaced laterally as practicable and, when signaling,
shall emit white or amber light, or any shade of light between white
and amber. The lamps showing to the rear shall be mounted on the
same level and as widely spaced laterally as practicable, and, when
signaling, shall emit a red or amber light, or any shade of color
between red and amber. Turn signal lamps on vehicles 80 inches or
more in over-all width shall be visible from a distance of not less
than 500 feet in normal sunlight. Turn signal lamps on vehicles
less than 80 inches wide shall be visible at a distance of not less
than 300 feet in normal sunlight. No lamp shall project a glaring or