
Total Traffic Volume & Performance in Davis County, Iowa
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day1,464 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 10.6% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 33.8 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. | 4.6% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 48.8 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $78,614 |
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A typical monitored road in Davis County, Iowa sees 1,464 vehicles per day, while its 149 miles of monitored roads together handle 163,251 vehicle-miles traveled per day (≈59.6 million per year). About 1 in 9 vehicles is a truck, in line with Iowa (11.0%).
Congestion 60% below the Iowa average
Davis's average daily traffic volume is 52% lower than the state average - 1,464 vehicles per day against 3,042 - suggesting less traffic load per road - quiet roads that suit freight movement more than drive-by retail. In total volume terms, its road network carries about 0.2% of Iowa's statewide total of vehicle-miles. 61% of counties in Iowa see more traffic than Davis's 1,464 vehicles per day.
The average trip takes 33.8 minutes, on par with the state level. Its average travel time of 33.8 minutes is longer than 56% of counties in Iowa.
The congestion ratio of 4.6% is 60% 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 Davis County, Iowa
| Traffic | vehicles per day3,670 |
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| Trucks | 12.2% |
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| Average travel time | 35.3 min |
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| Congestion ratio | 8.1% |
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| Drivers’ average age | 48.8 yrs |
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| Drivers’ average income | $79,485 |
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Travel in Davis County, Iowa splits roughly evenly, with about half of it (52% of vehicle-miles) on highways. The average highway carries 3,670 vehicles per day, 378% more than the average non-highway road in the same area, which carries 768 vehicles per day.
Highways make up 20% of the monitored road miles (29 miles, 181 segments), so they carry more than their share: 84,626 vehicle-miles traveled per day (≈30.9 million per year).
Fewer highway trucks than 96% of counties in Iowa
The concentration of trucks on highways (12.2%) 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.
Davis's highway truck share (12.2%) is lower than 78% of counties in Iowa. 96% of counties in Iowa see more highway trucks per day than Davis's roughly 446.

Non-highway Traffic in Davis County, Iowa
| Traffic | vehicles per day768 |
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| Trucks | 9.0% |
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| Average travel time | 33.3 min |
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| Congestion ratio | 3.5% |
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| Drivers’ average age | 49.1 yrs |
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| Drivers’ average income | $77,745 |
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Travel in Davis County, Iowa splits roughly evenly, with about half of it (48% of vehicle-miles) on local roads. On the average non-highway road, that comes to 768 vehicles per day.
Spread over 120 miles and 573 segments, 80% of the road network, local roads carry a lighter load per mile: 78,625 vehicle-miles traveled per day (≈28.7 million per year). The truck share on non-highway roads is 9.0%.
Local congestion 69% below the Iowa average
Non-highway roads carry a truck concentration that's 26% lower than the highway network.
At 69% lower than the state level, the non-highway congestion ratio of 3.5% signals easier movement on local roads.
Davis's average driver income is higher than 71% of counties in Iowa. The driver population here skews younger than 61% of counties in Iowa.