
Total Traffic Volume & Performance in Jefferson County, Montana
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day1,887 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 16.4% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 38.2 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. | 6.4% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 50.5 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $78,294 |
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The average monitored road in Jefferson County, Montana carries 1,887 vehicles per day. Across its 354 miles of monitored roads, that adds up to 929,067 vehicle-miles traveled per day (≈339 million per year). At 16.4%, the truck share runs above the 11.7% across Montana: about 1 in 6 vehicles.
Traffic 55% below the Montana average
At 1,887 vehicles per day, the average monitored road in Jefferson carries 55% less traffic than the state average of 4,202, suggesting less demand on each road - very light roads: easy truck access, but little passing trade for roadside retail. Network-wide, Jefferson accounts for about 3.3% of Montana's statewide total of vehicle-miles. 58% of counties in Montana see less traffic than Jefferson's 1,887 vehicles per day.
The average trip takes 38.2 minutes, 6% higher than the state level. On travel time, Jefferson runs shorter than 60% of counties in Montana.
Congestion runs 48% lower than the state level, at a ratio of 6.4%, which means smoother traffic flow - fewer delays make delivery windows more reliable.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Jefferson County, Montana
| Traffic | vehicles per day2,941 |
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| Trucks | 18.2% |
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| Average travel time | 38.8 min |
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| Congestion ratio | 6.5% |
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| Drivers’ average age | 50.2 yrs |
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| Drivers’ average income | $77,116 |
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Highways carry the vast majority of travel in Jefferson County, Montana, 84% of all vehicle-miles. The average highway carries 2,941 vehicles per day, 88% more than the average non-highway road in the same area, which carries 1,564 vehicles per day.
With 62% of the road miles (220 miles in 258 segments), highways punch above their length, carrying 776,940 vehicle-miles traveled per day (≈284 million per year).
89% of counties in Montana move less traffic on their highways.
More highway trucks than 72% of counties in Montana
At 18.2%, highway truck share is 21% higher than the state average. Highways here lean toward freight, so highway access is a real asset for logistics operators.
By truck concentration, highways here outrank 70% of counties in Montana. 72% of counties in Montana see fewer highway trucks per day than Jefferson's roughly 534.

Non-highway Traffic in Jefferson County, Montana
| Traffic | vehicles per day1,564 |
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| Trucks | 7.6% |
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| Average travel time | 38.1 min |
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| Congestion ratio | 6.4% |
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| Drivers’ average age | 50.8 yrs |
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| Drivers’ average income | $82,931 |
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Local roads carry a smaller share of travel in Jefferson County, Montana, 16% of vehicle-miles; most driving happens on highways. On the average non-highway road, that comes to 1,564 vehicles per day.
Local roads make up 38% of the monitored road miles (133 miles in 844 segments) but carry less than their share of travel: 152,127 vehicle-miles traveled per day (≈55.5 million per year). About 1 in 13 vehicles on non-highway roads is a truck (7.6%).
Drivers from higher-income areas than 93% of counties in Montana
Non-highway roads carry a truck concentration that's 58% lower than the highway network.
At 47% lower than the state level, the non-highway congestion ratio of 6.4% signals easier movement on local roads.
93% of counties in Montana see lower average driver income among trip origins than Jefferson. 51% of counties in Montana have a younger driver population than Jefferson.