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Item 5ARTERIAL STREET STANDARD Street Lighting Location Map Phase 2 Phase 1 Gateway Church Kirkwood Items to Consider AASHTO criteria for arterial street lighting coverage Desirable 1-foot candle average light Minimum 0.8 – foot candle average light City of Southlake Lighting ordinance Arterial street light - exempt 0.2 foot candle avg at residential property line Gullwing Standard Shoebox (Rectangular) OPTIONS Gullwing 150 Watt @ 200 foot spacing 250 Watt @ 180 foot spacing Shoebox 150 Watt @ 200 foot spacing 250 Watt @ 180 foot spacing Gullwing Shoebox Gullwing Shoebox ISSUES TO CONSIDER Aesthetics Fixture Minimize number of poles Light Spillover Street lighting vs. lighting ordinance Minimize lighting “hot spots” RECOMMENDATION Shoebox fixture Minimizes spillover Minimizes “hot spots” Maximizes average pavement lighting Questions? Items to consider Spacing to achieve 1 foot-candle (standard lighting measure) on the pavement: Pedestrian scale decorative street light poles spaced at 50’ on each side of the parkway requires 200+ poles Standard street light poles (Gullwing, Shoebox) spaced at 200’ in the median requires 30 poles Standard street light poles (Gullwing, Shoebox) spaced at 200’ on each side of the parkway requires 60 poles Additional Issues Standard street lights are directed to the pavement with limited spillover to adjacent property Decorative street lights spread light 360 degrees causing spillover to adjacent properties Gullwing Standard Shoebox (Rectangular or Round) Decorative Similar to Southlake Town Center parking lot lighting Installation and Maintenance Currently not included in Retail Electric Provider’s standard inventory Retail Electric Provider will install for additional cost and maintain at no additional cost Service Costs City is responsible Least expensive (similar to Option 2) Lighting Coverage (1-ft candle light average) Pole height: 30-40’ Spacing: 150-250’ Wattage: 400 W (HPS) Street Lighting PROS Primary light source is inexpensive Minimizes potential for “hotspots” Average 1 foot-candle light coverage with standard pole spacing CONS Currently not included in Tri-County or ONCOR’s standard inventory Similar to Byron Nelson Parkway street lighting Installation and Maintenance Included in REP’s standard inventory REP will install and maintain at no capital cost to the City Service Costs City is responsible Least expensive (similar to Option 1) Lighting coverage (1-ft candle lighting average) Pole height: 30-40’ Spacing: 150’-250’ Wattage: 400 W (HPS) Street Lighting PROS Primary light source is inexpensive Minimizes potential for “hotspots” Average 1 foot-candle light coverage with standard pole height and spacing Included in REP’s standard inventory CONS Aesthetics Similar to SH 114 intersection lighting at Kimball, Carroll and White Chapel Installation and Maintenance Included in REP’s standard inventory REP will install and maintain at no capital cost to the City Service Costs City is responsible Most expensive Lighting coverage (1-ft candle lighting average) Pole height: 16-20’ Spacing: 40-50’ Wattage: 250 W (HPS) Pedestrian-scale lighting Pedestrian-scale Lighting PROS Included in REP’s standard inventory Aesthetics CONS Pedestrian scale only, not intended for arterial roadway lighting Possible “dark spots” on inside turn lanes Possible “visual clutter” Spill-over to adjacent property Pole spacing to meet 1-ft candle coverage is 3-5 times the spacing for Options 1 and 2 Service costs