(A) Non Electronic Changeable Copy. Changeable copy by non-electronic means may be utilized on any permitted sign.
(B) Electronic Changeable Copy. Electronic message center (EMCs) signs are permitted in Nonresidential Districts in accordance with the sign areas permitted in § 150.357 in compliance with the following provisions:
(1) Frontage on Airport Highway (SR 2). Electronic message centers are permitted on lots in Nonresidential Districts with frontage on Airport Highway (SR 2) in compliance with the following:
(a) Setback from Residential Districts. The leading edge of the sign shall be a minimum distance of 100 feet from an abutting residential district boundary.
(b) Orientation. When located within 150 feet of a residential district, all parts of the electronic changeable copy sign shall be oriented so that no portion of the sign face is visible from an existing or permitted principal structure on such residential lot.
(2) EMC Illumination.
(a) The brightness of the EMC’s illuminance shall not exceed 0.3 foot-candles above the ambient light level in accordance with the following procedure:
1. The illuminance of an EMC shall be measured with an illuminance meter set to measure footcandles accurate to at least two decimals.
2. Illuminance shall be measured with the EMC off, and again with the EMC displaying a white image for a full color-capable EMC, or a solid message for a single-color EMC.
3. All measurements shall be taken as close as practical to a perpendicular plane of the sign at the distance determined by the following formula: Area of Sign Sq. Ft. x 100.
(b) All permitted EMCs shall be equipped with a sensor or other device that automatically determines the ambient illumination and be programmed to automatically dim according to ambient light conditions, or that can be adjusted to comply with the 0.3 footcandle measurements.
(c) Each EMC sign shall be operated with monitoring and methods in place that shall either turn off the display, or show a full black image on the display, in the event of a malfunction that affects more than fifty percent (50%) of the EMC sign face.
(3) EMC Display. EMC signs shall comply with the following display requirements:
(a) EMC signs shall have a minimum display time of eight (8) seconds.
(b) The transition time between messages and/or message frames shall not exceed three (3) seconds.
(c) Transitions may employ fade, dissolve, and or other transition effects.
(d) The following EMC display features and functions are prohibited: continuous scrolling and/or traveling, flashing, spinning, rotating, and similar moving effects, and all dynamic frame effects or patterns of illusionary movement or simulating movement.
(Ord. 2023-03, passed 2-27-2023)