Specifications include, but are not limited to: Vertical Solar Powered Rectangular Rapid Flashing Crosswalk Beacon Systems (RRFBS) must consist of the following: Signs must be double sided. Visible light emitting diode (LED) light in daylight, fog, and snow. Two (2) each 36 in. x 36 in. pedestrian crossing symbol W11-2, 2009 Manual of Uniform Traffic Devices (MUTCD) https://mutcd.fhwa.dot.gov/. Color must be fluorescent yellow/green with high intensity prismatic (HIP) or diamond grade cubed sheeting (DG3) or equal. One (1) each 24 in. x 12 in., arrow sign with a right, down arrow W16-7P(r), 2009 MUTCD with fluorescent yellow/green HIP or diamond grade cubed sheeting (DG3) or equal. One (1) each 24 in. x 12 in., arrow sign with a left, down arrow W16-7P(l), 2009 MUTCD, fluorescent yellow/green HIP or diamond grade cubed sheeting (DG3) or equal. One (1) each pre-wired, self-contained, battery powered solar engine.