
Total Traffic Volume & Performance in Jefferson County, Kentucky
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day14,083 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 7.7% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 32.5 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. | 30.1% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 46.0 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $88,544 |
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A typical monitored road in Jefferson County, Kentucky sees 14,083 vehicles per day, while its 835 miles of monitored roads together handle 14,775,115 vehicle-miles traveled per day (≈5.4 billion per year). Trucks are a smaller part of the mix than across Kentucky: 7.7% against 12.1%.
The busiest roads of any county in Kentucky
At 14,083 vehicles per day, the average monitored road in Jefferson carries 200% more traffic than the state average of 4,696, suggesting more demand on each road - heavy exposure for roadside retail, and tight road space for deliveries. Network-wide, Jefferson accounts for about 12% of Kentucky's statewide total of vehicle-miles. Jefferson stands out as having the highest traffic volume in Kentucky - 14,083 vehicles per day.
The average trip takes 32.5 minutes, on par with the state level. 66% of counties in Kentucky have a shorter average travel time than Jefferson's 32.5 minutes.
Congestion runs 105% higher than the state level, at a ratio of 30.1%, which means more pronounced congestion - peak-hour routing and delivery windows need real slack here.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Jefferson County, Kentucky
| Traffic | vehicles per day27,361 |
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| Trucks | 10.5% |
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| Average travel time | 35.0 min |
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| Congestion ratio | 46.6% |
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| Drivers’ average age | 46.2 yrs |
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| Drivers’ average income | $90,141 |
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A little more than half of the driving in Jefferson County, Kentucky happens on highways: 58% of all vehicle-miles. The average highway carries 27,361 vehicles per day, 113% more than the average non-highway road in the same area, which carries 12,872 vehicles per day.
Highways make up 33% of the monitored road miles (274 miles, 2,094 segments), so they carry more than their share: 8,512,783 vehicle-miles traveled per day (≈3.1 billion per year).
No county in Kentucky moves more traffic on its highways.
More highway trucks than 86% of counties in Kentucky
At 10.5%, highway truck share is 34% lower than the state average. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.
By truck concentration, highways here trail 80% of counties in Kentucky. Jefferson's highway truck count is higher than 86% of counties in Kentucky, at roughly 2,867 trucks per day.

Non-highway Traffic in Jefferson County, Kentucky
| Traffic | vehicles per day12,872 |
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| Trucks | 3.9% |
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| Average travel time | 32.3 min |
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| Congestion ratio | 28.6% |
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| Drivers’ average age | 45.9 yrs |
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| Drivers’ average income | $86,689 |
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A significant share of driving in Jefferson County, Kentucky, 42% of vehicle-miles, happens on local roads. The average non-highway road carries 12,872 vehicles per day.
Spread over 561 miles and 22,947 segments, 67% of the road network, local roads carry a lighter load per mile: 6,262,332 vehicle-miles traveled per day (≈2.3 billion per year). The truck share on non-highway roads is 3.9%.
Local congestion 106% above the Kentucky average
The concentration of trucks on non-highway roads is 62% lower than on highways.
The non-highway congestion ratio of 28.6% is 106% higher than the state level, suggesting slower local mobility than the state average.
94% of counties in Kentucky see lower average driver income among trip origins than Jefferson. Jefferson's median driver age is lower than 84% of counties in Kentucky.