
Total Traffic Volume & Performance in Cobb County, Georgia
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day12,142 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 6.6% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 33.1 min |
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Congestion ratio The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network. | 23.2% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 43.4 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $113,864 |
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A typical monitored road in Cobb County, Georgia sees 12,142 vehicles per day, while its 1,076 miles of monitored roads together handle 16,509,931 vehicle-miles traveled per day (≈6.0 billion per year). About 1 in 15 vehicles is a truck, fewer than the 1 in 10 across Georgia.
Busier roads than 99% of counties in Georgia
Cobb's average daily traffic volume is 64% higher than the state average - 12,142 vehicles per day against 7,398 - suggesting more traffic load per road - prime passing trade for storefronts, with more competition for road space. Across the whole network, that travel is about 5.9% of Georgia's statewide total. By volume, Cobb's 12,142 vehicles per day outpaces 99% of counties in Georgia.
At 33.1 minutes, the average travel time matches the state level closely. On travel time, Cobb runs shorter than 52% of counties in Georgia.
The congestion ratio of 23.2% is 38% higher, pointing to more pronounced congestion than the state level - expect slower peak-hour deliveries and less predictable arrival times.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Cobb County, Georgia
| Traffic | vehicles per day28,874 |
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| Trucks | 9.9% |
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| Average travel time | 42.2 min |
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| Congestion ratio | 46.5% |
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| Drivers’ average age | 43.6 yrs |
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| Drivers’ average income | $106,103 |
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Highways carry a significant share of travel in Cobb County, Georgia: 43% of all vehicle-miles. The average highway carries 28,874 vehicles per day, 157% more than the average non-highway road in the same area, which carries 11,216 vehicles per day.
With 17% of the road miles (181 miles in 1,809 segments), highways punch above their length, carrying 7,147,340 vehicle-miles traveled per day (≈2.6 billion per year).
No more than 4 other counties in Georgia move more traffic on their highways.
More highway trucks than 86% of counties in Georgia
The concentration of trucks on highways (9.9%) is 27% lower than the state average for similar road classifications. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.
By truck concentration, highways here trail 77% of counties in Georgia. 86% of counties in Georgia see fewer highway trucks per day than Cobb's roughly 2,858.

Non-highway Traffic in Cobb County, Georgia
| Traffic | vehicles per day11,216 |
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| Trucks | 4.0% |
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| Average travel time | 32.6 min |
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| Congestion ratio | 21.9% |
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| Drivers’ average age | 43.2 yrs |
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| Drivers’ average income | $118,380 |
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Local roads carry more than half of all travel in Cobb County, Georgia (57% of vehicle-miles). A typical local road sees 11,216 vehicles per day.
Spread over 895 miles and 32,669 segments, 83% of the road network, local roads carry a lighter load per mile: 9,362,591 vehicle-miles traveled per day (≈3.4 billion per year). The truck share on non-highway roads is 4.0%.
Drivers from higher-income areas than 98% of counties in Georgia
The concentration of trucks on non-highway roads is 59% lower than on highways.
The non-highway congestion ratio of 21.9% is 35% higher than the state level, suggesting slower local mobility than the state average.
Cobb's average driver income is higher than 98% of counties in Georgia. The driver population here skews younger than 91% of counties in Georgia.