
Total Traffic Volume & Performance in Jefferson County, Idaho
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day2,852 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 8.4% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 29.4 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. | 8.2% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 37.5 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $76,877 |
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Our data shows 2,852 vehicles per day on the average road in Jefferson County, Idaho, and 692,370 vehicle-miles traveled per day (≈253 million per year) across its 235 miles of monitored roads. About 1 in 12 vehicles is a truck, in line with Idaho (9.7%).
Shorter trips than 91% of counties in Idaho
Jefferson sees 50% lower average daily traffic volume than the state average (2,852 vehicles per day against 5,734), suggesting less demand on each road - quiet roads that suit freight movement more than drive-by retail. In total volume terms, its road network carries about 1.5% of Idaho's statewide total of vehicle-miles. Jefferson carries less traffic than 56% of counties in Idaho.
At 29.4 minutes, the average travel time is 13% lower than the state level. Its average travel time of 29.4 minutes is shorter than 91% of counties in Idaho.
The congestion ratio of 8.2% is 49% lower, pointing to smoother traffic flow than the state level - travel times are easy to plan around for scheduled deliveries.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Jefferson County, Idaho
| Traffic | vehicles per day8,567 |
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| Trucks | 10.2% |
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| Average travel time | 35.5 min |
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| Congestion ratio | 4.4% |
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| Drivers’ average age | 35.7 yrs |
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| Drivers’ average income | $72,854 |
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Travel in Jefferson County, Idaho splits roughly evenly, with about half of it (54% of vehicle-miles) on highways. The average highway carries 8,567 vehicles per day, 229% more than the average non-highway road in the same area, which carries 2,607 vehicles per day.
Highways make up 34% of the monitored road miles (79 miles, 76 segments), so they carry more than their share: 374,033 vehicle-miles traveled per day (≈137 million per year).
By highway travel volume, Jefferson outranks 53% of counties in Idaho.
Passenger-oriented highways
At 10.2%, highway truck share is 27% lower than the state average. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.
63% of counties in Idaho see a higher highway truck share than Jefferson's 10.2%. 62% of counties in Idaho see more highway trucks per day than Jefferson's roughly 878.

Non-highway Traffic in Jefferson County, Idaho
| Traffic | vehicles per day2,607 |
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| Trucks | 6.2% |
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| Average travel time | 29.2 min |
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| Congestion ratio | 8.3% |
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| Drivers’ average age | 39.8 yrs |
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| Drivers’ average income | $81,448 |
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Travel in Jefferson County, Idaho splits roughly evenly, with about half of it (46% of vehicle-miles) on local roads. A typical local road sees 2,607 vehicles per day.
Spread over 156 miles and 1,775 segments, 66% of the road network, local roads carry a lighter load per mile: 318,338 vehicle-miles traveled per day (≈116 million per year). Trucks make up 6.2% of non-highway traffic, about 1 in 16 vehicles.
Younger drivers than 95% of counties in Idaho
The concentration of trucks on non-highway roads is 40% lower than on highways.
Non-highway congestion (8.3%) runs 49% lower than the state average, pointing to smoother local traffic flow.
Jefferson's average driver income is higher than 84% of counties in Idaho. Jefferson's median driver age is lower than 95% of counties in Idaho.