(1)Except
as otherwise provided in this section, every authorized service vehicle must, in
addition to any other equipment required by this article 4, be equipped with one or
more warning lamps mounted as high as practicable, which must be capable of
displaying in all directions one or more flashing, oscillating, or rotating yellow
lights. Only yellow and no other color or combination of colors may be used as a
warning lamp on an authorized service vehicle; except that an authorized service
vehicle snowplow operated by a state, county, or local government may also be
equipped with and use no more than two flashing, oscillating, or rotating blue lights
as warning lamps. Lighted directional signs used by police and highway
departments to direct traffic need not be visible except t
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(1) Except
as otherwise provided in this section, every authorized service vehicle must, in
addition to any other equipment required by this article 4, be equipped with one or
more warning lamps mounted as high as practicable, which must be capable of
displaying in all directions one or more flashing, oscillating, or rotating yellow
lights. Only yellow and no other color or combination of colors may be used as a
warning lamp on an authorized service vehicle; except that an authorized service
vehicle snowplow operated by a state, county, or local government may also be
equipped with and use no more than two flashing, oscillating, or rotating blue lights
as warning lamps. Lighted directional signs used by police and highway
departments to direct traffic need not be visible except to the front and rear. Such
lights must have sufficient intensity to be visible at five hundred feet in normal
sunlight.
(2) The warning lamps authorized in subsection (1) of this section shall be
activated by the operator of an authorized service vehicle only when the vehicle is
operating upon the roadway so as to create a hazard to other traffic. The use of
such lamps shall not relieve the operator from the duty of using due care for the
safety of others or from the obligation of using any other safety equipment or
protective devices that are required by this article. Service vehicles authorized to
operate also as emergency vehicles shall also be equipped to comply with signal
requirements for emergency vehicles.
(3) Whenever an authorized service vehicle is performing its service function
and is displaying lights as authorized in subsection (1) of this section, drivers of all
other vehicles shall exercise more than ordinary care and caution in approaching,
overtaking, or passing such service vehicle and, in the case of highway and traffic
maintenance equipment engaged in work upon the highway, shall comply with the
instructions of section 42-4-712.
(4) On or after January 1, 1978, only authorized service vehicles shall be
equipped with the warning lights authorized in subsection (1) of this section.
(5) The department of transportation shall determine by rule which types of
vehicles render an essential public service when operating on or along a roadway
and warrant designation as authorized service vehicles under specified conditions,
including, without limitation, vehicles that sell or apply chains or other equipment to
motor vehicles necessary to enable compliance with section 42-4-106.
(6) (a) Any person who violates any provision of this section commits a class
B traffic infraction; except that a person commits a class A traffic infraction if the
person passes an authorized service vehicle snowplow that is operated by a state,
county, or local government, displaying lights as authorized in subsection (1) of this
section, and performing its service function in echelon formation with one or more
other such snowplows.
(b) As used in this subsection (6), unless the context otherwise requires,
echelon formation means a formation in which snowplows are arranged
diagonally, with each unit stationed behind and to the right, or behind and to the
left, of the unit ahead.