
Total Traffic Volume & Performance in Darke County, Ohio
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day2,371 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 8.3% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 36.2 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. | 7.9% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 50.6 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $64,872 |
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Our data shows 2,371 vehicles per day on the average road in Darke County, Ohio, and 987,464 vehicle-miles traveled per day (≈360 million per year) across its 537 miles of monitored roads. Trucks are a smaller part of the mix than across Ohio: 8.3% against 9.9%.
Longer trips than 85% of counties in Ohio
Darke sees 59% lower average daily traffic volume than the state average (2,371 vehicles per day against 5,773), suggesting less demand on each road - very light roads: easy truck access, but little passing trade for roadside retail. Across the whole network, that travel is about 0.4% of Ohio's statewide total. By volume, Darke's 2,371 vehicles per day trails 75% of counties in Ohio.
Journey times run 10% higher than the state level, at 36.2 minutes on average. On travel time, Darke runs longer than 85% of counties in Ohio.
The congestion ratio of 7.9% is 52% lower, pointing to smoother traffic flow than the state level - free-flowing roads make scheduled deliveries highly predictable.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Darke County, Ohio
| Traffic | vehicles per day5,497 |
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| Trucks | 11.2% |
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| Average travel time | 38.8 min |
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| Congestion ratio | 13.3% |
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| Drivers’ average age | 50.8 yrs |
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| Drivers’ average income | $67,116 |
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At 29% of vehicle-miles, highways carry a smaller share of the traffic in Darke County, Ohio than local roads. The average highway carries 5,497 vehicles per day, 154% more than the average non-highway road in the same area, which carries 2,161 vehicles per day.
Highways make up 10% of the monitored road miles (54 miles, 552 segments), so they carry more than their share: 284,052 vehicle-miles traveled per day (≈104 million per year).
Fewer highway trucks than 90% of counties in Ohio
The concentration of trucks on highways (11.2%) is 25% 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.
Darke's highway truck share (11.2%) is lower than 77% of counties in Ohio. By raw truck volume, Darke carries fewer highway trucks than 90% of counties in Ohio.

Non-highway Traffic in Darke County, Ohio
| Traffic | vehicles per day2,161 |
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| Trucks | 7.1% |
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| Average travel time | 36.1 min |
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| Congestion ratio | 7.6% |
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| Drivers’ average age | 50.5 yrs |
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| Drivers’ average income | $64,236 |
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Most travel in Darke County, Ohio happens on local roads, 71% of all vehicle-miles. The average non-highway road carries 2,161 vehicles per day.
Local roads make up 90% of the monitored road miles (483 miles in 8,232 segments) but carry less than their share of travel: 703,412 vehicle-miles traveled per day (≈257 million per year). The truck share on non-highway roads is 7.1%.
Older drivers than 78% of counties in Ohio
The concentration of trucks on non-highway roads is 37% lower than on highways.
Non-highway congestion (7.6%) runs 52% lower than the state average, pointing to smoother local traffic flow.
Darke's average driver income is lower than 76% of counties in Ohio. 78% of counties in Ohio have a younger driver population than Darke.