67 Pa. Code § 173.2
The following words and terms, when used in this chapter, have the following meanings, unless the context clearly indicates otherwise:
Authorized vehicle-The term as defined in 75 Pa.C.S. § 102 (relating to definitions).
Emergency vehicle-The term as defined in 75 Pa.C.S. § 102.
Flash-An intermittent burst of light.
Flash rate-The rate of flash, revolution or oscillation per minute of a single light, when that light is observed from a fixed position.
Flashing headlamp system-A system designed to automatically flash the high intensity-high beam-portion of the headlamps of a vehicle in either an alternate or simultaneous flash. The system shall be designed so that activation of the high intensity-high beam-portion of the standard headlamp system overrides the flashing headlamp system.
Flashing light-A light designed to flash by current interruption, or by other means providing an intermittent change in intensity when the light is observed from a fixed position.
Hazard warning system-Driver-controlled flashing front and rear lights used to warn approaching motorists when a vehicle is broken down or is traveling at a slow speed.
Intersection light-A flashing red, blue, white, or clear light used as part of a flashing, oscillating, or revolving light system to enhance the visibility of an emergency vehicle from the front and side as it approaches or travels through an intersection.
Light activation indicator-An audible signal or an illuminated switch or pilot light which provides the driver of an emergency or authorized vehicle with a clearly audible or visible and continual indicator that a flashing or revolving light, flashing headlamp system, traffic control emergency directional light or authorized nonflashing or nonrevolving light is activated.
Light-bar assembly-A device or devices designed and constructed to provide and display more than one steady burning, flashing, oscillating or revolving light.
Oscillating light-A light designed to flash by movement back and forth between two or more points, including the alternation between the maximum and minimum voltage.
Revolving light-A light designed to give the appearance of flashing by its rotation around a fixed axis through a 360° arc, on a horizontal plane.
Single light-A device containing one or more lenses, lamps or bulbs which are designed to produce, when viewed from a fixed position or point, the appearance of one flashing or revolving beam of light.
Traffic control emergency directional light assembly-A device electronically designed to display amber or yellow warning signal lights in a distinctive motion-lighting pattern-arrow left, arrow right, center out or alternately flashing-to warn motorists that they are approaching a hazard or to direct them around an impending hazard.
Unmarked police vehicle-A police vehicle not equipped with a roof-mounted light-bar assembly. The vehicle may display graphics, markings or decals, identifying the agency or department.
67 Pa. Code § 173.2
The provisions of this §173.2 amended under the Vehicle Code, 75 Pa.C.S. §§ 4571, 4572 and 6103.
This section cited in 67 Pa. Code § 173a.2 (relating to definitions).