GUIDANCE FOR USING RED LIGHT CAMERAS
Federal Highway AdministrationNational Highway Traffic Safety Administration
March 20, 2003
LIST OF TABLES
RED LIGHT CAMERA PROGRAM IMPLEMENTATION
Camera Housing and Supporting Structure
The types of camera housing and supporting structures will depend on the type of red light camera system being installed.
Curb-mounted red light camera systems, the most common type currently being employed by State and local agencies, need a camera housing enclosure that is mounted on a pole. The camera unit housing should be weather and damage resistant, and contain a locking mechanism to protect the system from vandalism. Additional poles may be employed for auxiliary flash lighting units. For digital camera systems, a separate enclosure for the data storage and communications equipment is also required at the intersection.
The poles for curb-mounted red light camera systems should be tall enough to provide the necessary angle of view to clearly record violations at the intersection. There are at least two types of poles currently in use. The first, a hinged pole, lowers the camera housing on a hinge located in the center of the pole. A second type, a solid pole, utilizes a motorized "elevator" to raise and lower the camera housing.
Overhead-mounted red light camera systems normally require curb-mounted poles with cantilever arms extending over the traffic lanes. Camera and flash units are mounted on the cantilever arms as required for system operation. Red light camera systems of this type provide an increased field of view that is especially advantageous for red light cameras on wider arterial streets as well as enhanced lighting for enhanced photographic data quality.