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Case Study Resource Center
GOVERNMENT TYPE
City/Town
County State
Population totals are from the US Census Bureau's American Fact Finder.
City/Town
Albuquerque, New Mexico (Population: 384,736)
Central New Mexico: Many Partners See the Light
Rebuild America Program, US Department of Energy.
August 1999.
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.
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.
Fort Hood, Texas (Population: 35,580)
Technology Bulletin: LED Traffic Signal Lighting
US Armed Forces Command Technology Bulletin.
January 31, 1999.
Fayetteville, Arkansas (Population: 58,047)
Case study prepared by City of Fayetteville
July 1, 2003.
Greensboro, North Carolina (Population, 183,521)
Traffic Signal Maintenance
City of Greensboro Traffic Signal Division.
Little Rock, Arkansas (Population: 183,133)
Conventional vs. LED Traffic Signals; Operational Characteristics and Feasibility
Case study prepared by Dept. of Public Works, City of Little Rock.
July 1, 2003.
New York City (Population: 7,322,564)
New York Power Authority Brightens Traffic Signals and Cuts Costs
New York Power Authority. September 3, 1998
Palo Alto, California (Population: 58,598)
City Moving Ahead to Reduce Water and Energy Use
City of Palo Alto Web site
August 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.
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.
Stamford, Connecticut (Population, 108,056)
Energy Efficient LED Signals
Engineering Bureau: Traffic Engineering Division.
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.
Scottsdale, Arizona (Population: 130,069)
Light Emitting Diodes to be used for traffic signal lights
City of Scottsdale Traffic Engineering Division. August 1998.
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.
County
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.
Energy Efficiency Sector: LED Traffic Signals
ENERGY STAR. June 1999.
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 (See Section H of Publications Catalog)
Public Technology Inc. December 1996.
Solar Powered LED Flasher Project
Hennepin County Department of Transportation & the Training and Employment Assistance Department. January 1998.
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.
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.
State
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.
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Evaluation of NYSDOT LED Traffic Installation: Troy-Green Bridge, Troy, N.Y.
Lighting Research Center Web site (NYSERDA-sponsored project)
April 2002.
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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