
Total Traffic Volume & Performance in Hamilton County, Iowa
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day1,470 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 17.2% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 33.6 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. | 6.1% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 47.3 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $78,452 |
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The average monitored road in Hamilton County, Iowa carries 1,470 vehicles per day. Across its 394 miles of monitored roads, that adds up to 1,145,474 vehicle-miles traveled per day (≈418 million per year). Freight weighs heavily here: trucks are 17.2% of traffic, against 11.0% across Iowa.
Traffic 52% below the Iowa average
Hamilton's average daily traffic volume is 52% lower than the state average - 1,470 vehicles per day against 3,042 - suggesting less traffic load per road - very light roads: easy truck access, but little passing trade for roadside retail. Network-wide, Hamilton accounts for about 1.4% of Iowa's statewide total of vehicle-miles. By volume, Hamilton's 1,470 vehicles per day trails 60% of counties in Iowa.
The average trip takes 33.6 minutes, on par with the state level. 52% of counties in Iowa have a shorter average travel time than Hamilton's 33.6 minutes.
Congestion runs 46% lower than the state level, at a ratio of 6.1%, which means smoother traffic flow - travel times are easy to plan around for scheduled deliveries.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Hamilton County, Iowa
| Traffic | vehicles per day6,768 |
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| Trucks | 20.2% |
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| Average travel time | 63.3 min |
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| Congestion ratio | 15.0% |
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| Drivers’ average age | 44.5 yrs |
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| Drivers’ average income | $80,115 |
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Most travel in Hamilton County, Iowa happens on highways, 74% of all vehicle-miles. The average highway carries 6,768 vehicles per day, 419% more than the average non-highway road in the same area, which carries 1,303 vehicles per day.
With 27% of the road miles (108 miles in 90 segments), highways punch above their length, carrying 844,735 vehicle-miles traveled per day (≈308 million per year).
By highway travel volume, Hamilton outranks 81% of counties in Iowa.
Higher highway truck share than 77% of counties in Iowa
The concentration of trucks on highways (20.2%) is 26% higher than the state average for similar road classifications. Highways here lean toward freight, so highway access is a real asset for logistics operators.
By truck concentration, highways here outrank 77% of counties in Iowa. Hamilton's highway truck count is higher than 74% of counties in Iowa, at roughly 1,369 trucks per day.

Non-highway Traffic in Hamilton County, Iowa
| Traffic | vehicles per day1,303 |
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| Trucks | 8.7% |
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| Average travel time | 32.7 min |
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| Congestion ratio | 5.9% |
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| Drivers’ average age | 51.2 yrs |
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| Drivers’ average income | $76,580 |
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Local roads carry a smaller share of travel in Hamilton County, Iowa, 26% of vehicle-miles; most driving happens on highways. The average non-highway road carries 1,303 vehicles per day.
Local roads make up 73% of the monitored road miles (286 miles in 2,865 segments) but carry less than their share of travel: 300,740 vehicle-miles traveled per day (≈110 million per year). The truck share on non-highway roads is 8.7%.
Younger drivers than 79% of counties in Iowa
Non-highway roads carry a truck concentration that's 57% lower than the highway network.
At 47% lower than the state level, the non-highway congestion ratio of 5.9% signals easier movement on local roads.
69% of counties in Iowa see lower average driver income among trip origins than Hamilton. 79% of counties in Iowa have an older driver population than Hamilton.