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U.S. Department of Transportation
Environmental Benefits from Current
Systems
§The 2007 National Traffic
Signal Report Card estimated that “updating signal
timing costs less than $3,000 per intersection,” can reduce emissions up to 22%, and has a
high return on investment.
§A number of
traffic signal coordination projects in the United
States have documented emissions savings. Some examples
include:
□Syracuse, New York | The implementation of
traffic signal coordination reduced emissions by 9 to 13%, reduced delays by 14 to 19%, and increased the
average speed by 7 to 17%.
□St. Augustine, Texas | Traffic signal
coordination resulted
in a
savings of 26,000 gallons of fuel, reduced delays by 36%, and saved $1.1
million.
□Los Angeles,
California | Emissions reductions of 14% and a reduction of fuel by 13% were achieved by
implementing traffic signal coordination.
□Oakland County,
Michigan | The County’s traffic signal coordination project reduced CO by 1.7 to 2.5
percent, NOx by 1.9 to 3.5%, and
reduced fuel consumption by 2.7 to 4.2%.