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<br />Streetlights & Traffic Signals Sector Detailed Report <br />The “Streetlights & Traffic Signals” sector includes all traffic signals, all sidewalk lighting and <br />all outdoor park-lighting owned and operated by the city. This category was responsible for <br />approximately 30.7% of University City’s 2005 Government Operations emissions making it the <br />second highest emitting sector behind “Buildings & Facilities”. Furthermore, the City spent <br />approximately $562,669 to power its streetlights and traffic signals in 2005, more than any other <br />sector. A more in depth breakdown of this sector is provided in Table 25. As visible in this <br />table, “unmetered street lighting” proved to be the largest GHG emitter, energy user, and the <br />most expensive type of lighting to power. <br /> <br />The University City Department of Public Works is currently performing a comprehensive street <br />lighting study aimed to save energy through the development of a more efficient street light <br />policy. The 4,060 street lights inventoried within University City limits fall into the following <br />three categories: privately-owned/Ameren operated; University City owned and operated; and <br />Ameren-owned/operated but billed to University City. Within this report, only the approximate <br />460 street lights owned and operated by University City along with the approximate 3,339 street <br />xxiv <br />lights owned and operated by Ameren, but billed to University City have been included. <br />University City-owned lights only account for one percent of the total lighting energy use. The <br />Ameren-owned lights account 99 percent of the lighting energy use and costs. According to the <br />City’s lighting study, there are eight different types of light fixtures comprising two main groups: <br />Cobra and Post Top. The majority of these lights are furnished with one of three different bulb <br />xxv <br />types: High Pressure Sodium (HPS), Mercury Vapor (MV), or Metal Halide (MH). <br /> <br />Table 25: Streetlights & Traffic Signals GHG Emissions, 2005 <br /> <br />₂₂ <br />CO COe <br />₂₄₂ <br />NO CH COe Cost <br /> (MMBtu) <br /> <br />(metric (metric <br />xxvi <br />($) <br />(kg)(kg)(%) <br /> <br />tons)tons) <br /> <br />Athletic Field <br />53 1 1 53 0.7 216 3,528 <br />xxvii <br />Lighting <br />Decorative Park <br />Lighting-10 0 0 10 0.1 41 440 <br />xxviii <br />Electricity <br />Metered Street <br />83 1 1 84 1.1 342 5,945 <br />xxix <br />Lighting <br />Park Fountains- <br />49 1 1 50 0.7 203 3,553 <br />xxx <br />Electricity <br />Park Sign <br />Lighting-6 0 0 6 0.1 26 549 <br />xxxi <br />Electricity <br />2010-2011 Greenhouse Gas Emissions Inventory, City of University City, MO 32 <br /> <br /> <br />