Perimeter-area commuters are spending less time slamming on their brakes and are saving about 32 hours a year in travel time in portions of Sandy Springs, Dunwoody and Brookhaven.
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Traffic signal timing along three corridors was synchronized by May 2013:
- Ashford Dunwoody Road
- Peachtree Dunwoody Road
- Perimeter Center West / Abernathy Road
Traffic signal timing along these corridors was synchronized by August 2013:
- Hammond Road
- Perimeter Center Parkway
- Mount Vernon Road
- Chamblee Dunwoody Road
- Johnson Ferry Road
- Glenridge Road
- Interconnected 76 signals via fiber-optic cable to the Sandy Springs Traffic Control Center, which allows for the live management of the traffic.
An annual time and fuel cost savings of $30.20 per vehicle, per year and a total of $3.9 million in savings for the 215,000 vehicles that pass through the Perimeter area each day. That’s based on a value of $12 per hour for motorists’ time and $3.50 per gallon for gasoline.
Area commuters saved an average of 32 hours of travel time per vehicle, per year.
- Average vehicular delay (stopped time) was reduced by 29 percent.
Fuel consumption was reduced by 1.23 gallons per vehicle per year, or a total of 640 gallons per day for all drivers.
- Daily pollutant emissions were reduced by a total of 2.86 pounds per vehicle, per year, or a total of 1,490 pounds per year.
By the numbers
99: Total number of traffic signals
86: Number of signals that needed upgrades
45: Signals monitored by Sandy Springs Traffic Control Center prior to the program
20: Signals that were linked to the DeKalb County Traffic Control Center, but not actively monitored
76: Signals now monitored by Sandy Springs Traffic Control Center