City of Phildelphia: Light emitting diodes for traffic signal displays

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Description

This project investigated the feasibility of using light emitting diodes (LEDs) for red traffic signals in a demonstration program at 27 signalized intersections in the City of Philadelphia. LED traffic signals have the potential to achieve significant savings over standard incandescent signals in terms of energy usage and costs, signal relamping costs, signal system maintenance costs, tort liability, and environmental impact. Based on successful experience with the demonstration program, the City of Philadelphia is currently developing funding for the conversion of all existing red incandescent traffic signals at approximately 2,700 intersections to LED signals. This program is expected to cost ... continued below

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Medium: P; Size: 67 p.

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Creator: Unknown. December 1, 1995.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

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Description

This project investigated the feasibility of using light emitting diodes (LEDs) for red traffic signals in a demonstration program at 27 signalized intersections in the City of Philadelphia. LED traffic signals have the potential to achieve significant savings over standard incandescent signals in terms of energy usage and costs, signal relamping costs, signal system maintenance costs, tort liability, and environmental impact. Based on successful experience with the demonstration program, the City of Philadelphia is currently developing funding for the conversion of all existing red incandescent traffic signals at approximately 2,700 intersections to LED signals. This program is expected to cost approximately $4.0 million and save about $850,000 annually in energy costs. During late 1993 and early 1994, 212 red LED traffic signals (134 8-inch signals and 78 12-inch signals) were installed at 27 intersections in Philadelphia. The first group of 93 signals were installed at 13 prototypical intersections throughout the City. The remaining group of signals were installed on a contiguous route in West Philadelphia consisting of standard incandescent signals and LED signals interspersed in a random pattern.

Physical Description

Medium: P; Size: 67 p.

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OSTI as DE96012882

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  • Other Information: PBD: Dec 1995

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  • Other: DE96012882
  • Report No.: DOE/CE/16067--9(Rev)
  • Grant Number: FC02-92CE16067
  • DOI: 10.2172/258151 | External Link
  • Office of Scientific & Technical Information Report Number: 258151
  • Archival Resource Key: ark:/67531/metadc673308

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  • December 1, 1995

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  • June 29, 2015, 9:42 p.m.

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  • Nov. 30, 2015, 6:10 p.m.

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City of Phildelphia: Light emitting diodes for traffic signal displays, report, December 1, 1995; United States. (digital.library.unt.edu/ark:/67531/metadc673308/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.