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TrafficThe average number of vehicles that travel each day over any road in the road network. | vehicles per day4,202 |
|---|---|
TrucksThe percentage of the total traffic volume composed of heavy vehicles. | 11.7% |
Average travel timeThe average time of travel averaged among all vehicles traveling on the road network. | 36.2 min |
Congestion ratioThe rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network. | 12.3% |
Drivers’ average ageAverage age of residents in the geographic areas where the vehicle trips originated. | 46.5 yrs |
Drivers’ average incomeAverage income of residents in the geographic areas where the vehicle trips originated. | $72,981 |
The average monitored road in Montana carries 4,202 vehicles per day. Across its 11,058 miles of monitored roads, that adds up to 28,466,944 vehicle-miles traveled per day (≈10.4 billion per year). At 11.7%, the truck share runs above the 9.3% across the US: about 1 in 9 vehicles.
Montana's average daily traffic volume is 40% lower than the national average - 4,202 vehicles per day against 6,986 - suggesting less traffic load per road - less drive-by exposure for retail, but easier access for deliveries. Across the whole network, that travel is about 0.4% of the national total. 84% of states nationwide see more traffic than Montana's 4,202 vehicles per day.
The average trip takes 36.2 minutes, 9% higher than the national level. On travel time, Montana runs longer than 94% of states nationwide.
Congestion runs 35% lower than the national level, at a ratio of 12.3%, which means smoother traffic flow - travel times are easy to plan around for scheduled deliveries.
| Traffic | vehicles per day5,906 |
|---|---|
| Trucks | 15.0% |
| Average travel time | 37.7 min |
| Congestion ratio | 15.5% |
| Drivers’ average age | 46.7 yrs |
| Drivers’ average income | $72,483 |
A little more than half of the driving in Montana happens on highways: 60% of all vehicle-miles. The average highway carries 5,906 vehicles per day, 56% more than the average non-highway road in the same area, which carries 3,777 vehicles per day.
With 43% of the road miles (4,765 miles in 15,951 segments), highways punch above their length, carrying 17,136,946 vehicle-miles traveled per day (≈6.3 billion per year).
The concentration of trucks on highways (15.0%) is 15% higher than the national average for similar road classifications. The highway traffic mix is typical for the US: neither freight- nor commuter-dominated.
By truck concentration, highways here outrank 72% of states nationwide. By raw truck volume, Montana carries fewer highway trucks than 94% of states nationwide.
| Traffic | vehicles per day3,777 |
|---|---|
| Trucks | 6.7% |
| Average travel time | 36.0 min |
| Congestion ratio | 12.1% |
| Drivers’ average age | 46.5 yrs |
| Drivers’ average income | $74,042 |
Local roads carry a significant share of travel in Montana: 40% of all vehicle-miles. The average non-highway road carries 3,777 vehicles per day.
Spread over 6,293 miles and 63,848 segments, 57% of the road network, local roads carry a lighter load per mile: 11,330,002 vehicle-miles traveled per day (≈4.1 billion per year). Trucks make up 6.7% of non-highway traffic, about 1 in 15 vehicles.
The concentration of trucks on non-highway roads is 55% lower than on highways.
The non-highway congestion ratio of 12.1% is 34% lower than the national level, suggesting more efficient local mobility than the national average.
Trip origins here have lower average income than 88% of states nationwide. 66% of states nationwide have a younger driver population than Montana.
Montana's biggest difference from the United States average is its average daily traffic per road, 40% below it. Its truck share, by contrast, is 25% above.
| Metric | Montana | United States average | Difference |
|---|---|---|---|
| Traffic | 4,202 | 6,986 | -39.8% |
| Truck % (Total Traffic) | 11.7% | 9.3% | +24.8% |
| Truck % (Highway) | 15.0% | 13.1% | +14.6% |
| Avg. Travel Time | 36.2 min | 33.3 min | +8.6% |
Against the 4 nearest states, Montana moves 36.8% of the total daily travel and carries 37.5% less traffic on a typical road; it has the fourth busiest roads of the five. Less traffic and more room for it - the roads here run both quieter and freer than the states around them.
| State | Average daily traffic | Truck share | Daily vehicle-miles | Average travel time | Congestion ratio |
|---|---|---|---|---|---|
| Montana | 4,202 | 11.7% | 28,466,944 | 36.2 min | 12.3% |
| Idaho | 5,734 | 9.7% | 45,169,444 | 33.8 min | 16.0% |
| Wyoming | 3,650 | 17.9% | 21,843,304 | 34.5 min | 11.5% |
| Utah | 10,198 | 8.9% | 87,040,466 | 32.2 min | 21.2% |
| Washington | 7,322 | 7.1% | 155,256,676 | 33.2 min | 19.9% |
| United States average | 6,986 | 9.3% | N/A | 33.3 min | 18.9% |
Together, those three counties carry 29.8% of all the vehicle-miles measured in the state.
| County | Daily vehicle-miles | Average daily traffic | Truck share | Road miles |
|---|---|---|---|---|
| 1. Yellowstone County | 3,250,724 | 6,471 | 8.5% | 701 |
| 2. Gallatin County | 2,700,371 | 5,024 | 9.0% | 629 |
| 3. Missoula County | 2,532,447 | 7,276 | 9.8% | 466 |
Together, those five counties carry 12.2% of the truck vehicle-miles driven in the state.
| County | Truck share | Truck share on highways | Average daily traffic | Daily vehicle-miles |
|---|---|---|---|---|
| 1. Mineral County | 25.8% | 27.1% | 1,957 | 513,086 |
| 2. Sweet Grass County | 20.8% | 21.5% | 1,675 | 510,315 |
| 3. Wibaux County | 20.5% | 21.2% | 1,001 | 94,828 |
| 4. Powell County | 20.1% | 21.4% | 2,327 | 584,984 |
| 5. Treasure County | 19.7% | 20.0% | 806 | 155,876 |
Ranked by truck vehicle-miles instead of truck share, the list is different: Yellowstone County, Missoula County, Gallatin County, Jefferson County and Flathead County carry 32.2% of all truck travel in Montana.
Traffic concentrates on a few corridors: the top three roads on this list average 41,823 vehicles a day, against 4,202 on the average road in Montana.
Last Chance Gulch Street in Lewis and Clark County tops the list with 56,385 vehicles a day, 2,593 of them trucks (4.6%). That is 63% more than the next road, US Route 2 in Flathead County (34,660). Lower Box Elder Road in Hill County carries the most trucks on the list, 3,367 a day (83.2% of its traffic), although it is not among the 10 busiest roads overall.
Freight stands out on Lower Box Elder Road in Hill County and I 90 in Deer Lodge County: trucks are 83.2% and 23.4% of the traffic there, against 11.7% state-wide.
Trips using Lower Box Elder Road in Hill County are long: a median of 86.1 minutes against 36.2 state-wide, the mark of a through route.
Lower Box Elder Road in Hill County draws drivers from lower-income areas: their neighborhoods average $36,059 in household income, 51% below the state's $72,981.
Only named roads are listed. Some unnamed segments, such as ramps or unlabeled carriageways, may carry as much traffic as the roads shown.
Delays build on Last Chance Gulch Street: its congestion ratio of 68% over free-flow time is well above the state's 12%.
US Route 2 carries 8.2 times the state average on its busiest stretch, where the median trip lasts 39.3 minutes.
Travel on Central Avenue's busiest stretch runs 45% over free-flow time, against 12% across the state, so expect slower peak hours.
At 8.1 times the state average, Reserve Street draws drivers from neighborhoods averaging $77,969 in household income.
A main artery: Main Street's busiest stretch carries 8.1 times the state average; trucks are 6.7% of it, below the state-wide 11.7%.
First Avenue North Bridge is a trunk route for the state, carrying 7.7 times the state average on its busiest stretch; trucks are 4.3% of it, below the state-wide 11.7%.
10th Avenue carries 7.6 times the state average at its busiest, 1,339 of them trucks (4.2%, below the state-wide 11.7%).
US 87 carries 7.3 times the state average on its busiest stretch, where the median trip lasts 30.7 minutes.
At 6.7 times the state average, 19th Avenue draws drivers from neighborhoods averaging $86,606 in household income.
A main artery: US 93's busiest stretch carries 6.5 times the state average; trucks are 2.6% of it, below the state-wide 11.7%.
Only named roads are listed. Some unnamed segments, such as ramps or unlabeled carriageways, may carry as much traffic as the roads shown.
Even at its busiest, Lower Box Elder Road carries about the same as the state average; trucks are 83.2% of it, above the state-wide 11.7%.
The busiest stretch of I 90 carries 4.9 times the state average; trucks are 14.1% of it, above the state-wide 11.7%.
I 90 is a trunk route for the state, carrying 6.0 times the state average on its busiest stretch; trucks are 11.2% of it, in line with the state-wide 11.7%.
On its busiest stretch, I 90 carries 3.2 times the state average; trucks are 21.0% of it, above the state-wide 11.7%.
I 15 peaks at 16,615 vehicles a day, 4.0 times the state average; trucks are 16.6% of it, above the state-wide 11.7%.
I 90 carries 3.8 times the state average at its busiest, 2,754 of them trucks (17.1%, above the state-wide 11.7%).
I 90 carries 2.8 times the state average on its busiest stretch, where the median trip lasts 43.4 minutes.
Drivers on I 90 are on long journeys, a median 70.3 minutes against 36.2 state-wide: a through route more than a local street.
I 90 carries through traffic: the median trip using it lasts 61.3 minutes, against 36.2 for the state.
The average monitored road in Montana carries 4,202 vehicles per day, 40% less than the national average of 6,986.
Montana carries fewer highway trucks by raw volume than 94% of states nationwide, at roughly 885 per day.
The average trip in Montana takes 36.2 minutes, 9% longer than the national average of 33.3 minutes, delays at signals and congestion included.
Drivers on Montana roads have a median age of 47 years, and the median household income of the neighborhoods trips originate from averages $72,981, 20% below the national average.
Weekday traffic has two busy windows: a long morning plateau from 8:00 AM to 12:00 PM and PM peak 3:00 PM–6:00 PM - about 79% above the daily average.
Trucks make up about 11.7% of all traffic in Montana, rising to 15.0% on highways, where long-haul freight concentrates.
Traffic in Montana peaks in June–August, when volumes run 27% above the annual average. January is the quietest month, averaging 3,140 vehicles per day, 25% below the annual average.
About 56,385 vehicles per day in both directions on its busiest stretch, including 2,593 trucks (4.6%). Traffic is lower on its quieter stretches; TrafficZoom shows the count for every segment.
About 3,367 trucks per day on its busiest stretch, 83.2% of its 4,048 vehicles.

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The same traffic breakdown for the states closest to Montana.
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Traffic counts, truck share, congestion and driver demographics for each of the 56 counties TrafficZoom measures in Montana.