
Total Traffic Volume & Performance in Adams County, Idaho
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day2,204 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 9.4% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 40.3 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. | 6.8% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 55.7 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $65,821 |
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A typical monitored road in Adams County, Idaho sees 2,204 vehicles per day, while its 69 miles of monitored roads together handle 137,788 vehicle-miles traveled per day (≈50.3 million per year). Trucks are 9.4% of traffic, close to the 9.7% across Idaho.
Longer trips than 86% of counties in Idaho
At 2,204 vehicles per day, the average monitored road in Adams carries 62% less traffic than the state average of 5,734, suggesting less demand on each road - very light roads: easy truck access, but little passing trade for roadside retail. In total volume terms, its road network carries about 0.3% of Idaho's statewide total of vehicle-miles. Adams carries less traffic than 65% of counties in Idaho.
Journey times run 19% higher than the state level, at 40.3 minutes on average. 86% of counties in Idaho have a shorter average travel time than Adams's 40.3 minutes.
Congestion runs 57% lower than the state level, at a ratio of 6.8%, which means smoother traffic flow - free-flowing roads make scheduled deliveries highly predictable.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Adams County, Idaho
| Traffic | vehicles per day2,934 |
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| Trucks | 9.4% |
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| Average travel time | 42.4 min |
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| Congestion ratio | 8.3% |
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| Drivers’ average age | 55.6 yrs |
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| Drivers’ average income | $67,069 |
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Nearly all driving in Adams County, Idaho happens on highways: 95% of every vehicle-mile. The average highway carries 2,934 vehicles per day, 593% more than the average non-highway road in the same area, which carries 424 vehicles per day.
Highways make up 71% of the monitored road miles (49 miles, 541 segments), so they carry more than their share: 131,073 vehicle-miles traveled per day (≈47.8 million per year).
Fewer highway trucks than 91% of counties in Idaho
The concentration of trucks on highways (9.4%) is 33% 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 74% of counties in Idaho. Adams's highway truck count is lower than 91% of counties in Idaho, at roughly 277 trucks per day.

Non-highway Traffic in Adams County, Idaho
| Traffic | vehicles per day424 |
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| Trucks | 8.2% |
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| Average travel time | 35.2 min |
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| Congestion ratio | 3.2% |
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| Drivers’ average age | 62.1 yrs |
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| Drivers’ average income | $52,847 |
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Local roads play a minor role in Adams County, Idaho, carrying just 5% of all vehicle-miles. The average non-highway road carries 424 vehicles per day.
Local roads make up 29% of the monitored road miles (20 miles in 222 segments) but carry less than their share of travel: 6,715 vehicle-miles traveled per day (≈2.5 million per year). Trucks make up 8.2% of non-highway traffic, about 1 in 12 vehicles.
Older drivers than 93% of counties in Idaho
Compared to highways, non-highway routes see 13% fewer trucks by share.
Non-highway congestion (3.2%) runs 80% lower than the state average, pointing to smoother local traffic flow.
72% of counties in Idaho see higher average driver income among trip origins than Adams. The driver population here skews older than 93% of counties in Idaho.