
Total Traffic Volume & Performance in Silver Bow County, Montana
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day4,147 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 12.6% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 38.7 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. | 11.7% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 48.2 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $64,975 |
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The average monitored road in Silver Bow County, Montana carries 4,147 vehicles per day. Across its 204 miles of monitored roads, that adds up to 726,867 vehicle-miles traveled per day (≈265 million per year). Trucks are 12.6% of traffic, close to the 11.7% across Montana.
Busier roads than 85% of counties in Montana
Silver Bow's average daily traffic volume of 4,147 vehicles per day is on par with the state average of 4,202. In total volume terms, its road network carries about 2.6% of Montana's statewide total of vehicle-miles. Silver Bow carries more traffic than 85% of counties in Montana.
At 38.7 minutes, the average travel time is 7% higher than the state level. 56% of counties in Montana have a longer average travel time than Silver Bow's 38.7 minutes.
At 11.7%, the congestion ratio matches the state level closely.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Silver Bow County, Montana
| Traffic | vehicles per day4,528 |
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| Trucks | 17.0% |
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| Average travel time | 31.2 min |
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| Congestion ratio | 10.9% |
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| Drivers’ average age | 49.5 yrs |
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| Drivers’ average income | $70,444 |
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A little more than half of the driving in Silver Bow County, Montana happens on highways: 64% of all vehicle-miles. The average highway carries 4,528 vehicles per day, 10% more than the average non-highway road in the same area, which carries 4,117 vehicles per day.
Their share of road miles is similar, 57% (116 miles in 195 segments), carrying 463,404 vehicle-miles traveled per day (≈169 million per year).
72% of counties in Montana move less traffic on their highways.
More highway trucks than 76% of counties in Montana
Highway truck concentration here runs 13% higher than the state average, at 17.0%. The highway traffic mix is typical for Montana: neither freight- nor commuter-dominated.
Silver Bow's highway truck share (17.0%) is higher than 63% of counties in Montana. Silver Bow's highway truck count is higher than 76% of counties in Montana, at roughly 769 trucks per day.

Non-highway Traffic in Silver Bow County, Montana
| Traffic | vehicles per day4,117 |
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| Trucks | 5.0% |
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| Average travel time | 39.3 min |
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| Congestion ratio | 11.8% |
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| Drivers’ average age | 48.0 yrs |
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| Drivers’ average income | $62,966 |
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Local roads carry a significant share of travel in Silver Bow County, Montana: 36% of all vehicle-miles. A typical local road sees 4,117 vehicles per day.
Their share of road miles is similar, 43% (88 miles in 2,508 segments), carrying 263,463 vehicle-miles traveled per day (≈96.2 million per year). About 1 in 20 vehicles on non-highway roads is a truck (5.0%).
Younger drivers than 75% of counties in Montana
Compared to highways, non-highway routes see 71% fewer trucks by share.
At 11.8%, the non-highway congestion ratio matches the state level closely.
Trip origins here have lower average income than 56% of counties in Montana. The driver population here skews younger than 75% of counties in Montana.