This section outlines the requirements for accessory signs which utilize electronic digital technology to create a static sign which can have changeable copy or display a variable message and/or feature a graphic display. Such signs may be all or a portion of an allowed ground sign or wall sign, provided that the following conditions are met:
A. Digital signs are only allowed in areas that are zoned as C-4 and C-5.
B. No digital sign shall be located within fifty feet (50') of the driving surface of a signalized intersection, measured in a straight line from the leading edge of the sign structure to the nearest edge of pavement. Such sign may not be located closer than twenty feet (20') from the edge of any other street. Such signs must also comply with the setback provisions of this title, which may result in a greater setback.
C. Digital signs shall only display a static message or messages. There shall be no effects of movement, blinking, animation, scrolling, flashing, or similar effects in the individual images.
D. Digital signs which display more than one static message shall do so sequentially, with each static message having a dwell time of no less than eight (8) seconds and a transition time between static messages of no more than one second. Changes of image shall not be instantaneous as seen by the human eye, and shall not use blinking or similar effects as part of the change.
E. Digital signs shall not display an illuminative brightness exceeding three hundred (300) NITs at any time between one-half (1/2) hour before sunset until sunrise of the next day or five thousand (5,000) NITs between sunrise until one-half (1/2) hour before sunset.
F. Digital signs shall not display an illuminative brightness of such intensity or brilliance that they impair the vision or endanger the safety and welfare of any cyclist or person operating a motor vehicle.
G. Digital signs shall not resemble or simulate any warning or danger signal, or any official traffic control device, sign, signal, or light.
H. All digital signs shall have installed ambient light monitors or photocells, and shall at all times allow such devices to automatically adjust the brightness level of the sign based on ambient light conditions. Each sign shall be equipped with a default mechanism that will automatically freeze the sign in one position or display a static message if a malfunction occurs.
I. If a digital sign is visible from a nearby residential zoning district, it shall be located no closer than two hundred feet (200') from the closest point of that residential zoning district, measured in a straight line from the nearest point of the sign structure to the nearest point of the residential district.
J. The requirements of subsections C, D, E, F, and H of this section shall be certified by an electrical engineer licensed in the state of Oklahoma. (Ord. 1147, 2015)