
Total Traffic Volume & Performance in Yellowstone County, Montana
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day6,471 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 8.5% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 34.2 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. | 16.0% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 46.0 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $79,094 |
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The average monitored road in Yellowstone County, Montana carries 6,471 vehicles per day. Across its 701 miles of monitored roads, that adds up to 3,250,724 vehicle-miles traveled per day (≈1.2 billion per year). Trucks are a smaller part of the mix than across Montana: 8.5% against 11.7%.
Busier roads than 98% of counties in Montana
Yellowstone sees 54% higher average daily traffic volume than the state average (6,471 vehicles per day against 4,202), suggesting more demand on each road - heavy exposure for roadside retail, and tight road space for deliveries. Network-wide, Yellowstone accounts for about 11% of Montana's statewide total of vehicle-miles. Yellowstone carries more traffic than 98% of counties in Montana.
The average trip takes 34.2 minutes, 5% lower than the state level. Its average travel time of 34.2 minutes is shorter than 85% of counties in Montana.
At 30% higher than the state level, the 16.0% congestion ratio signals more pronounced congestion - a factor for delivery windows and signal timing.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Yellowstone County, Montana
| Traffic | vehicles per day6,962 |
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| Trucks | 13.2% |
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| Average travel time | 33.0 min |
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| Congestion ratio | 16.2% |
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| Drivers’ average age | 46.6 yrs |
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| Drivers’ average income | $77,767 |
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A significant share of driving in Yellowstone County, Montana, 44% of vehicle-miles, happens on highways. The average highway carries 6,962 vehicles per day, 8% more than the average non-highway road in the same area, which carries 6,441 vehicles per day.
Highways also make up about 37% of the monitored road miles: 258 miles in 570 segments, together carrying 1,432,616 vehicle-miles traveled per day (≈523 million per year).
No more than 2 other counties in Montana move more traffic on their highways.
More highway trucks than 78% of counties in Montana
Highway truck concentration here runs 12% lower than the state average, at 13.2%. The highway traffic mix is typical for Montana: neither freight- nor commuter-dominated.
By truck concentration, highways here trail 67% of counties in Montana. 78% of counties in Montana see fewer highway trucks per day than Yellowstone's roughly 916.

Non-highway Traffic in Yellowstone County, Montana
| Traffic | vehicles per day6,441 |
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| Trucks | 4.9% |
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| Average travel time | 34.3 min |
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| Congestion ratio | 15.9% |
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| Drivers’ average age | 46.0 yrs |
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| Drivers’ average income | $79,599 |
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A little more than half of the driving in Yellowstone County, Montana happens on local roads: 56% of all vehicle-miles. The average non-highway road carries 6,441 vehicles per day.
Local roads also make up about 63% of the monitored road miles: 443 miles in 9,249 segments, together carrying 1,818,108 vehicle-miles traveled per day (≈664 million per year). The truck share on non-highway roads is 4.9%.
Drivers from higher-income areas than 95% of counties in Montana
The concentration of trucks on non-highway roads is 63% lower than on highways.
The non-highway congestion ratio of 15.9% is 32% higher than the state level, suggesting slower local mobility than the state average.
95% of counties in Montana see lower average driver income among trip origins than Yellowstone. 87% of counties in Montana have an older driver population than Yellowstone.