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Case Study Resource Center
REPORTS SORTED BY REGION
Northeast ·
Southeast ·
Midwest/Mountain ·
Northwest
California ·
Southwest ·
International
Population totals are from the US Census Bureau's American Fact Finder.
Northeast
Boston area, Massachusetts
Case Studies of Successful LED Traffic Signal Installations and Documentation of a Three-Color Signal Demonstration. (fee)
(updated February 2001 with Boston-area case studies)
American Council for an Energy-Efficient Economy for Boston Edison Company. December 1999.
New York City (Population: 7,322,564)
New York Power Authority Brightens Traffic Signals and Cuts Costs
New York Power Authority. September 3, 1998
New York State (Population: 18,976,457)
NYS Department of Transportation: An Effective LED Traffic Signal Purchasing Strategy to Save Maintenance and Energy Costs
Lighting Research Center Web site (NYSERDA-sponsored project)
September 2001.
Philadelphia, Pennsylvania (Population: 1,585,577)
Case Studies of Successful LED Traffic Signal Installations and Documentation of a Three-Color Signal Demonstration (fee)
(updated February 2001 with Boston-area case studies)
American Council for an Energy-Efficient Economy for Boston Edison Company. December 1999.
Light Emitting Diodes for Traffic Signal Displays
Public Technology Inc. 1993.
Stamford, Connecticut (Population, 108,056)
Energy Efficient LED Signals
Engineering Bureau: Traffic Engineering Division.
Troy, N.Y. (Population: 49,170)
Evaluation of NYSDOT LED Traffic Installation: Troy-Green Bridge, Troy, N.Y.
Lighting Research Center Web site (NYSERDA-sponsored project)
April 2002.
Southeast
Greensboro, North Carolina (Population, 183,521)
Traffic Signal Maintenance
City of Greensboro Traffic Signal Division.
Lee County, Florida (Population: 335,113)
Installation of LED Displays in the Red Section of a Traffic Signal
Lee County Department of Transportation: Traffic Section.
Midwest/Mountain
Boulder, Colorado (Population, 83,312)
Energy-saving Traffic Lights Installed
The Boulder County Business Report. April 1997.
Bowling Green, Ohio (Population: 28,176)
City of Bowling Green, Ohio Case Study
Center for Renewable Energy and Sustainable Technology.
1994.
City and County of Denver (Population: 467,610)
An ENERGY STARSM Buildings and Green Lights® Case Study for The City and County of Denver
ENERGY STAR Buildings. 1998.
Traffic Innovations: LED Traffic Signals
Traffic Operations Division, City of Denver. November 2000.
Hennepin County, Minnesota (Population: 1,032,431)
Solar Powered Blinkie: Solar Powered LED Applications Under Cold Weather Climatic Conditions
Public Technology Inc. December 1996.
Solar Powered LED Flasher Project
Hennepin County Department of Transportation & the Training and Employment Assistance Department. January 1998.
St. Louis, Missouri (Population: 396,685)
Innovations: LED Traffic Signals
City of St. Louis Street Department. October 10, 1999.
St. Paul, Minnesota (Population: 272,235)
City installs 72 energy-saving experimental LED traffic signals
City of St. Paul. March 6, 1996.
St. Paul Public Works puts technology to the test in City's parking meters and traffic signals
St. Paul Department of Public Works. January 1996.
Northwest
King County, Washington (Population: 1,507,319)
What's New this Week in Transportation: Bright Ideas for Conserving Electricity
King County Department of Transportation. February 19, 2001.
Portland, Oregon (Population: 529,121)
The City of Portland Finds Energy Savings in LED Traffic Signals
Report by Curt Nichols, Portland Office of Sustainable Development
March 2002.
California
Palo Alto, California (Population: 58,598)
City Moving Ahead to Reduce Water and Energy Use
City of Palo Alto Web site
August 2001.
Sunnyvale, California (Population: 117,229)
City gets the LED out in New Traffic Lights
The Sun: Sunnyvale's Newspaper. April 28, 1998.
Retrofit of Existing Red Incandescent Bulbs in Traffic Signals with Red Light Emitting Diodes (LEDs) (TR-97-1) RTC #98-039
City of Sunnyvale Department of Public Works. February 3, 1998.
Southwest
Albuquerque, New Mexico (Population: 384,736)
Central New Mexico: Many Partners See the Light
Rebuild America Program, US Department of Energy.
August 1999.
Scottsdale, Arizona (Population: 130,069)
Light Emitting Diodes to be used for traffic signal lights
City of Scottsdale Traffic Engineering Division. August 1998.
International
Singapore
LED for Traffic Lights
Singapore Land Transportation Authority Web site
December 2000.
CONTACT
For more information about CEE's Energy-Efficient Traffic Signal Initiative, contact Susan Loucks at 617-589-3949, ext. 205.
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