Item 5ARTERIAL STREET STANDARDStreet 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