
Total Traffic Volume & Performance in Missoula County, Montana
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day7,276 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 9.8% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 35.0 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. | 16.8% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 42.7 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $75,921 |
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A typical monitored road in Missoula County, Montana sees 7,276 vehicles per day, while its 466 miles of monitored roads together handle 2,532,447 vehicle-miles traveled per day (≈924 million per year). Trucks are a smaller part of the mix than across Montana: 9.8% against 11.7%.
The busiest roads of any county in Montana
At 7,276 vehicles per day, the average monitored road in Missoula carries 73% more traffic than the state average of 4,202, suggesting more demand on each road - prime passing trade for storefronts, with more competition for road space. In total volume terms, its road network carries about 8.9% of Montana's statewide total of vehicle-miles. At 7,276 vehicles per day, Missoula posts the highest average traffic volume in Montana.
At 35.0 minutes, the average travel time matches the state level closely. On travel time, Missoula runs shorter than 84% of counties in Montana.
At 37% higher than the state level, the 16.8% congestion ratio signals more pronounced congestion - a factor for delivery windows and signal timing.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Missoula County, Montana
| Traffic | vehicles per day13,747 |
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| Trucks | 12.4% |
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| Average travel time | 33.2 min |
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| Congestion ratio | 23.8% |
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| Drivers’ average age | 44.0 yrs |
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| Drivers’ average income | $76,573 |
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Highways carry more than half of all travel in Missoula County, Montana (61% of vehicle-miles). The average highway carries 13,747 vehicles per day, 136% more than the average non-highway road in the same area, which carries 5,836 vehicles per day.
Highways make up 45% of the monitored road miles (209 miles, 1,271 segments), so they carry more than their share: 1,541,691 vehicle-miles traveled per day (≈563 million per year).
That is the most highway travel volume of any county in Montana.
More highway trucks than 83% of counties in Montana
The concentration of trucks on highways (12.4%) is 17% 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.
Missoula's highway truck share (12.4%) is lower than 74% of counties in Montana. Missoula's highway truck count is higher than 83% of counties in Montana, at roughly 1,702 trucks per day.

Non-highway Traffic in Missoula County, Montana
| Traffic | vehicles per day5,836 |
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| Trucks | 5.7% |
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| Average travel time | 35.4 min |
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| Congestion ratio | 15.2% |
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| Drivers’ average age | 41.2 yrs |
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| Drivers’ average income | $75,246 |
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A significant share of driving in Missoula County, Montana, 39% of vehicle-miles, happens on local roads. The average non-highway road carries 5,836 vehicles per day.
Local roads make up 55% of the monitored road miles (258 miles in 5,709 segments) but carry less than their share of travel: 990,755 vehicle-miles traveled per day (≈362 million per year). The truck share on non-highway roads is 5.7%.
Younger drivers than 96% of counties in Montana
Non-highway roads carry a truck concentration that's 54% lower than the highway network.
Non-highway congestion (15.2%) runs 26% higher than the state average, pointing to slower local traffic flow.
85% of counties in Montana see lower average driver income among trip origins than Missoula. The driver population here skews younger than 96% of counties in Montana.