10.26.2021-SBN-Standards-Manufacturer-Additions-Minor-Revisions-final

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SECTION 6 – TRAFFIC AND LIGHTING 89 6-5.2 (b) MULTI-COMPONENT (EPOXY) Multi-Component is a durable marking material that can be used on any asphalt or on concrete pavement with an AADT value greater than 20,000 VPD or designated as an Arterial route, unless otherwise directed by the City. 6-5.2 (c) PREFORMED PLASTIC Preformed Plastic markings shall be used where there is a need for more durable, retained retro- reflectivity, increased detection distance, and wet retro-reflectivity characteristics. Preformed Plastic is a durable marking material that can be used on either bituminous or concrete pavement with an AADT greater than 20,000 VPD or designated as an Arterial route, unless otherwise directed by the City. Preformed plastic longitudinal skip line markings with pavement grooves shall be considered on all multi-lane concrete pavement projects. 6-5.2 (d) TRAFFIC PAINT Paint marking material is to be used where the additional cost of durable pavement markings is not warranted as determined by the Engineering Department. 6-5.3 GUIDANCE DEVICES Guidance Devices shall be provided to delineate curb extensions to mark the curb line from damage caused by heavy equipment during snow plowing operations. P.S.B GESMA Inc.’s R-6 curb markers shall be located and installed per manufacturer’s recommendation at the intersections to locate the face of curb. 6-6 LIGHTING 6-6.1 GENERAL The lighting criteria shall be the illuminance design method meeting the guidelines listed in AASHTO Roadway Lighting Design Guide. The road surface for asphalt pavements shall be considered an R3 classification, unless directed otherwise. The general land use term “commercial” shall be considered the boundary defined by the central business district. The lighting system shall take into account the effects that trees have on light distribution. The City Engineer shall approve all light fixtures installed within the Right-of-Way. The electrical power supply shall be single (1)-phase. If only three (3)-phase service is available, then a step down to single (1)-phase is required. The lighting layouts shall have wiring circuits A or B designed to avoid dark zones if either of the wire circuits would fail. Luminaires along a straight section of roadway typically have the A and B connections alternating with the opposite designation across the street. The lighting circuit shall be controlled at the service point by a photocell. All new lighting luminaire installations shall be a LED light source with color temperature between 4,500 K to 5,000 K without blue light. The bases, poles, mast arm, and fixtures shall be made of cast aluminum or steel with a black powder coat finish. Provisions for dark skies within the City right-of -way shall be considered.