Electronic message signs shall be permitted only in accord with this section.
A. Types of signs.
(1) In the C-1 Convenience Commercial, C-2 Office Park, I Industrial and I-A Industrial Airport Districts, the following types of signs, as otherwise permitted by this chapter, may be in the form of an electronic message sign:
(a) Changeable panel sign (§
400-114G).
(b) Individual freestanding business identification sign [§
400-114A(2)].
(c) Shopping center and multiple occupant business freestanding identification sign [§
400-114B(3)].
(d) A retail fuel sales sign (§
400-114F).
(2) An off-premises advertising sign or billboard (§
400-115), as otherwise permitted by this chapter, may be an electronic message sign only adjacent to I-380 in accord with this section and PennDOT requirements.
B. Standards. In addition to the other applicable requirements of this chapter, electronic message signs shall comply with the following:
(1) One sign. Only one electronic message sign shall be permitted per lot. If the sign structure has two sign faces, each sign face may be an electronic message sign.
(2) Size. The electronic message sign shall not exceed 80% of the maximum allowable size of a nonelectronic message sign of the same type.
(3) Message display.
(a) Motion. Electronic message sign motion shall be limited to the transition from one message to another. The image shall be static, with no animation, streaming video, flashing, scrolling, fading, or other illusions of motion.
(b) Transition. Transitions for electronic message signs shall change without any of the following: fading in or out; scrolling; blinking; sudden bursts of light or sound; and/or, the appearance of graphics or animation. The content shall not change more than once every 15 seconds.
(c) Continuation. The images and messages displayed shall be complete on display without continuation in content to the next image or message or to any other sign.
(d) Projection. Images or messages projected onto buildings or other objects shall be prohibited.
(e) No red, green or yellow lights shall be permitted such that the display looks like a traffic signal.
(4) Luminance. Electronic message signs shall not display light of such intensity or brilliance to cause glare, hazard or impair the vision of the motorist, or interfere with the effectiveness of an official traffic sign, device or signal.
(a) Maximum. Electronic message signs shall have a maximum luminance of 5,000 nits when measured from the sign face at its maximum brightness during daylight hours. During the nighttime, such signs shall be limited to a maximum luminance of 150 nits when measured from the sign face at its maximum brightness.
(b) Dimmer control. All electronic message signs shall be equipped with both a dimmer control and a photocell that automatically adjusts the display's luminance according to natural ambient light conditions.
(c) Light trespass. Electronic message signs shall comply with the light and glare requirements of § 27-49I. The maximum light trespass limit at the boundary line of R-1, R-2, R-3, SP and W-C Districts and permanent open space shall be 0.1 footcandle, and 1.0 footcandle at the boundary line of C-1, C-2, I and I-A Districts.
(d) Measurement. Surface luminance measurements shall be made directly with a calibrated luminance meter in accord with manufacturer's specifications. Readings shall be taken from the area from which the sign will be visible, usually the road, and which is closest to being directly in front of the sign where the luminosity output is most focused. This reading shall be the measurement of an all-white image display to evaluate the worst-case scenario. With an all-white display, a maximum of 200 nits shall be permitted during nighttime.
(e) Certification. Prior to issuance of a sign permit, the applicant shall provide written certification from the sign manufacturer that the sign luminance has been factory preset to not exceed 5,000 nits and that the intensity has been protected from end-user manipulation by password-protected software.
(5) Height. The electronic message sign shall not exceed the maximum allowable height of a nonelectronic message sign of the same type.
(6) Structural support. No more than one digital sign or billboard may be installed on a single structural support; that is, signs shall not be stacked vertically or horizontally.
(7) Automatic shutoff. The controls for the sign shall include fail-safe programming to freeze the static image or turn off the sign in the case of a malfunction to prevent a violation of ordinance provisions.
(8) Emergency messages. The applicant shall be required to coordinate and permit message access from local, regional, state and national emergency services during emergency situations and such messages shall not be required to conform to the message standards in this section.
(9) No messages shall be displayed that are intended to be and/or that result in a dangerous distraction to drivers.
(10) The sign shall utilize a non-glare face combined with flat-colored borders to minimize reflection of the sun or vehicle headlights. The sign shall have dark backgrounds and light letters, rather than light backgrounds and dark letters, to help reduce glare.
(11) No electronic message sign shall be located within 500 feet of any lot containing a residential use and/or any lot located within a residential zoning district.
(12) No two electronic message signs shall be spaced less than 300 feet apart.