In Oakland County, Michigan retiming 640 traffic signals during a two-phase project resulted in Carbon monoxide reductions of 1.7 and 2.5 percent, Nitrogen oxide reductions of 1.9 and 3.5 percent, and hydrocarbon reductions of 2.7 and 4.2 percent.
Oakland County, Michigan Traffic Signal Retiming
Date Posted
01/19/2007
Michigan, United States
Oakland County:
Michigan,
United States
Identifier
2007-B00426
Red Light, Green Light
Summary Information
This journal article examined how appropriate timing of traffic signals can decrease congestion, improve air quality, and reduce fuel consumption. Example retiming programs in Syracuse, New York and Oakland County, Michigan were highlighted.
FINDINGS
The benefits of improved signal timing have been demonstrated in Oakland County, Michigan and Syracuse, New York.
The benefits of improved signal timing have been demonstrated in Oakland County, Michigan and Syracuse, New York.
- In Oakland County, Michigan, retiming 640 traffic signals during a two-phase project resulted in Carbon monoxide reductions of 1.7 and 2.5 percent, Nitrogen oxide reductions of 1.9 and 3.5 percent, and hydrocarbon reductions of 2.7 and 4.2 percent.
- In Syracuse, New York, benefits were realized when signal timing was optimized for 145 intersections. Signal retiming decreased the number of stops by 15.7 percent, reduced travel time by 16.7 percent, lowered delay by 18.8 percent, caused a 13.8 percent decline in fuel consumption, and resulted in a 13 percent reduction in vehicle emissions and noise pollution.
Red Light, Green Light
Red Light, Green Light
Source Publication Date
11/02/2004
Publisher
Public Roads Journal, U.S. DOT
Goal Areas
Deployment Locations