2.1 The Signal Heads shall meet the requirements set forth in the latest edition of the Manual of Uniform Traffic Control Devices (MUTCD) and the latest edition of the Institute of Transportation Engineers (ITE) Equipment Standard for Vehicular Traffic Control Signal Heads. 2.2 Traffic Signal Head 2.2.1 Traffic signal heads shall be constructed of flat black colored polycarbonate material. 2.2.2 Traffic signal heads shall be constructed with interchangeable sections that may be rearranged into City of Lincoln Signal Configurations. 2.2.3 Traffic signal heads shall be compatible with Astro-Brac mounting hardware available from PELCO Products, Inc., or approved alternate. 2.2.4 Traffic signal head material shall be colored to full depth. Cuts and scratches shall not uncover uncolored material. 2.2.5 Mounting hardware for LEDs shall be installed for later LED installation. 2.2.6 Traffic signal head sections shall be factory assembled according to the configuration ordered by the City. 2.3 Back Plates 2.3.1 Back plates shall be constructed of flat black colored, one piece, vacuum formed polycarbonate material. 2.3.2 Back plates shall have reinforcing flange on all edges. 2.3.3 Back plate material shall be colored to full depth. Cuts and scratches shall not uncover uncolored material. 2.3.4 Mounting hardware for back plates shall be included with all back plate orders. 2.3.5 Back plates shall not be mounted to the traffic signal heads prior to delivery. 2.4 Visors 2.4.1 Visors shall be tunnel type constructed of flat black colored, one piece polycarbonate material. 2.4.2 Visors material shall be colored to full depth. Cuts and scratches shall not uncover uncolored material. 2.4.3 Visors shall be mounted to the traffic signal head in vertical configuration. 2.5 Terminal Blocks 2.5.1 Terminal blocks for traffic signal heads shall be 6 position barrier type constructed of Bakelite material with brass terminals and brass screws. 2.5.2 Terminal blocks shall be mounted in the yellow section of a 3-section signal. Terminal blocks shall be mounted in the yellow, yellow arrow, and red sections of a 5-section signal. 2.5.3 Terminal blocks for pedestrian signal heads shall be 3 position barrier type constructed of Bakelite material with brass terminals and brass screws.
