
Total Traffic Volume & Performance in Stillwater County, Montana
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day1,674 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 18.6% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 35.5 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. | 6.6% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 49.9 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $80,282 |
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A typical monitored road in Stillwater County, Montana sees 1,674 vehicles per day, while its 179 miles of monitored roads together handle 544,514 vehicle-miles traveled per day (≈199 million per year). Freight weighs heavily here: trucks are 18.6% of traffic, against 11.7% across Montana.
Traffic 60% below the Montana average
Stillwater sees 60% lower average daily traffic volume than the state average (1,674 vehicles per day against 4,202), 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 1.9% of Montana's statewide total of vehicle-miles. Stillwater carries less traffic than 53% of counties in Montana.
Journey times here (35.5 minutes on average) closely track the state level. 78% of counties in Montana have a longer average travel time than Stillwater's 35.5 minutes.
Congestion runs 46% lower than the state level, at a ratio of 6.6%, which means smoother traffic flow - fewer delays make delivery windows more reliable.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Stillwater County, Montana
| Traffic | vehicles per day5,264 |
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| Trucks | 20.6% |
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| Average travel time | 49.0 min |
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| Congestion ratio | 13.0% |
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| Drivers’ average age | 48.5 yrs |
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| Drivers’ average income | $77,224 |
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The vast majority of driving in Stillwater County, Montana happens on highways: 82% of all vehicle-miles. The average highway carries 5,264 vehicles per day, 295% more than the average non-highway road in the same area, which carries 1,332 vehicles per day.
With 43% of the road miles (77 miles in 100 segments), highways punch above their length, carrying 448,279 vehicle-miles traveled per day (≈164 million per year).
70% of counties in Montana move less traffic on their highways.
More highway trucks than 96% of counties in Montana
The concentration of trucks on highways (20.6%) is 38% higher than the state average for similar road classifications. Highways here lean toward freight, so highway access is a real asset for logistics operators.
88% of counties in Montana see a lower highway truck share than Stillwater's 20.6%. By raw truck volume, Stillwater carries more highway trucks than 96% of counties in Montana.

Non-highway Traffic in Stillwater County, Montana
| Traffic | vehicles per day1,332 |
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| Trucks | 8.9% |
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| Average travel time | 34.2 min |
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| Congestion ratio | 6.0% |
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| Drivers’ average age | 53.1 yrs |
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| Drivers’ average income | $88,443 |
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Local roads carry a smaller share of travel in Stillwater County, Montana, 18% of vehicle-miles; most driving happens on highways. A typical local road sees 1,332 vehicles per day.
Spread over 102 miles and 1,049 segments, 57% of the road network, local roads carry a lighter load per mile: 96,235 vehicle-miles traveled per day (≈35.1 million per year). About 1 in 11 vehicles on non-highway roads is a truck (8.9%).
Drivers from higher-income areas than 96% of counties in Montana
The concentration of trucks on non-highway roads is 57% lower than on highways.
Non-highway congestion (6.0%) runs 51% lower than the state average, pointing to smoother local traffic flow.
96% of counties in Montana see lower average driver income among trip origins than Stillwater. Stillwater's median driver age is lower than 60% of counties in Montana.