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Traffic heat map of Montana: roads over 1,000 vehicles a day shaded from blue (light) to red (heavy traffic)

Montana Traffic Counts

Our Montana traffic data covers 79,799 road segments over 11,058 road miles, with an average segment of just 732 ft. Trips here are among the 5 longest of any state nationwide. Whether you are evaluating a new retail location, planning routes or assessing infrastructure, these numbers replace guesswork.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
Updated:
September 29, 2026
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total traffic icon

Total Traffic Volume & Performance in Montana

Traffic

The average number of vehicles that travel each day over any road in the road network.

vehicles per day4,202
Trucks

The percentage of the total traffic volume composed of heavy vehicles.

11.7%
Average travel time

The average time of travel averaged among all vehicles traveling on the road network.

36.2 min
Congestion ratio

The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.

12.3%
Drivers’ average age

Average age of residents in the geographic areas where the vehicle trips originated.

46.5 yrs
Drivers’ average income

Average 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.

Longer trips than 94% of states nationwide

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.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Montana

Trafficvehicles per day5,906
Trucks15.0%
Average travel time37.7 min
Congestion ratio15.5%
Drivers’ average age46.7 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).

Fewer highway trucks than 94% of states nationwide

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.

non-highway traffic icon

Non-highway Traffic in Montana

Trafficvehicles per day3,777
Trucks6.7%
Average travel time36.0 min
Congestion ratio12.1%
Drivers’ average age46.5 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.

Drivers from lower-income areas than 88% of states nationwide

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.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
A long morning plateau from 8:00 AM to 12:00 PM and PM peak 3:00 PM–6:00 PM, with volumes reaching approximately 79% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 14% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +27% versus the annual average.
Lowest month:
January is the quietest month, with volumes -25% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Montana, the peak hour concentrates about 7% of the day's traffic, and there is a strong seasonal swing of +27% in high season.

Montana vs. United States Traffic Comparison

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.

MetricMontanaUnited States averageDifference
Traffic4,2026,986-39.8%
Truck % (Total Traffic)11.7%9.3%+24.8%
Truck % (Highway)15.0%13.1%+14.6%
Avg. Travel Time36.2 min33.3 min+8.6%

How Montana compares

Montana against nearby states

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.

Montana and the 4 nearest states by centroid distance, with the United States average for scale.
StateAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Montana4,20211.7%28,466,94436.2 min12.3%
Idaho5,7349.7%45,169,44433.8 min16.0%
Wyoming3,65017.9%21,843,30434.5 min11.5%
Utah10,1988.9%87,040,46632.2 min21.2%
Washington7,3227.1%155,256,67633.2 min19.9%
United States average6,9869.3%N/A33.3 min18.9%

Busiest counties in Montana

Together, those three counties carry 29.8% of all the vehicle-miles measured in the state.

Ranked by daily vehicle-miles, across the 56 counties in Montana with a published traffic page. Vehicle-miles is total travel, so this ranks by traffic MOVED rather than by how busy a typical road is.
CountyDaily vehicle-milesAverage daily trafficTruck shareRoad miles
1. Yellowstone County3,250,7246,4718.5%701
2. Gallatin County2,700,3715,0249.0%629
3. Missoula County2,532,4477,2769.8%466

Most truck-intensive counties in Montana

Together, those five counties carry 12.2% of the truck vehicle-miles driven in the state.

Ranked by truck share of all traffic, across the same 56 counties, shown with the traffic volume that share is measured against.
CountyTruck shareTruck share on highwaysAverage daily trafficDaily vehicle-miles
1. Mineral County25.8%27.1%1,957513,086
2. Sweet Grass County20.8%21.5%1,675510,315
3. Wibaux County20.5%21.2%1,00194,828
4. Powell County20.1%21.4%2,327584,984
5. Treasure County19.7%20.0%806155,876

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.

Busiest roads 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.

Ranked by daily traffic (AADT)

Only named roads are listed. Some unnamed segments, such as ramps or unlabeled carriageways, may carry as much traffic as the roads shown.

Cars and light vehiclesTrucks
1Last Chance Gulch StreetLewis and Clark County · Primary road · 56,385vehicles2,593trucks · 4.6%
Road class
Primary road
Congestion ratio
67.6%
Median trip time
55.5 min
Drivers’ median age
48.6 yrs
Drivers’ average income
$67,071

Delays build on Last Chance Gulch Street: its congestion ratio of 68% over free-flow time is well above the state's 12%.

2US Route 2Flathead County · Primary road · 34,660vehicles1,529trucks · 4.4%
Road class
Primary road
Congestion ratio
38.0%
Median trip time
39.3 min
Drivers’ median age
47.8 yrs
Drivers’ average income
$70,367

US Route 2 carries 8.2 times the state average on its busiest stretch, where the median trip lasts 39.3 minutes.

3Central AvenueCascade County · Trunk road · 34,426vehicles2,417trucks · 7.0%
Road class
Trunk road
Congestion ratio
44.7%
Median trip time
47.6 min
Drivers’ median age
47.2 yrs
Drivers’ average income
$57,701

Travel on Central Avenue's busiest stretch runs 45% over free-flow time, against 12% across the state, so expect slower peak hours.

4Reserve StreetMissoula County · Trunk road · 34,189vehicles1,309trucks · 3.8%
Road class
Trunk road
Congestion ratio
44.4%
Median trip time
31.8 min
Drivers’ median age
44.6 yrs
Drivers’ average income
$77,969

At 8.1 times the state average, Reserve Street draws drivers from neighborhoods averaging $77,969 in household income.

5Main StreetYellowstone County · Trunk road · 33,851vehicles2,269trucks · 6.7%
Road class
Trunk road
Congestion ratio
36.6%
Median trip time
31.1 min
Drivers’ median age
46.0 yrs
Drivers’ average income
$72,131

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%.

6First Avenue North BridgeCascade County · Primary road · 32,375vehicles1,389trucks · 4.3%
Road class
Primary road
Median trip time
36.0 min
Drivers’ median age
47.7 yrs
Drivers’ average income
$58,524

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%.

710th AvenueCascade County · Trunk road · 32,070vehicles1,339trucks · 4.2%
Road class
Trunk road
Congestion ratio
38.9%
Median trip time
34.6 min
Drivers’ median age
47.4 yrs
Drivers’ average income
$67,386

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%).

8US 87Yellowstone County · Trunk road · 30,828vehicles2,302trucks · 7.5%
Road class
Trunk road
Congestion ratio
24.8%
Median trip time
30.7 min
Drivers’ median age
46.1 yrs
Drivers’ average income
$71,877

US 87 carries 7.3 times the state average on its busiest stretch, where the median trip lasts 30.7 minutes.

919th AvenueGallatin County · Primary road · 28,078vehicles984trucks · 3.5%
Road class
Primary road
Congestion ratio
41.3%
Median trip time
31.4 min
Drivers’ median age
39.5 yrs
Drivers’ average income
$86,606

At 6.7 times the state average, 19th Avenue draws drivers from neighborhoods averaging $86,606 in household income.

10US 93Flathead County · Primary road · 27,310vehicles703trucks · 2.6%
Road class
Primary road
Congestion ratio
35.3%
Median trip time
36.3 min
Drivers’ median age
49.8 yrs
Drivers’ average income
$73,192

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%.

Ranked by trucks per day

Only named roads are listed. Some unnamed segments, such as ramps or unlabeled carriageways, may carry as much traffic as the roads shown.

Cars and light vehiclesTrucks
1Lower Box Elder RoadHill County · Tertiary road · 4,048vehicles3,367trucks · 83.2%
Road class
Tertiary road
Median trip time
86.1 min
Drivers’ median age
40.6 yrs
Drivers’ average income
$36,059

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%.

2I 90Gallatin County · Motorway · 20,491vehicles2,887trucks · 14.1%
Road class
Motorway
Congestion ratio
19.2%
Median trip time
35.3 min
Drivers’ median age
41.9 yrs
Drivers’ average income
$83,934

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%.

3I 90Yellowstone County · Motorway · 25,405vehicles2,833trucks · 11.2%
Road class
Motorway
Congestion ratio
28.6%
Median trip time
32.6 min
Drivers’ median age
47.2 yrs
Drivers’ average income
$77,499

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%.

4I 90Broadwater County · Motorway · 13,342vehicles2,800trucks · 21.0%
Road class
Motorway
Median trip time
46.8 min
Drivers’ median age
45.3 yrs
Drivers’ average income
$73,673

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%.

5I 15Silver Bow County · Motorway · 16,615vehicles2,761trucks · 16.6%
Road class
Motorway
Congestion ratio
18.0%
Median trip time
29.6 min
Drivers’ median age
49.5 yrs
Drivers’ average income
$70,685

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%.

6I 90Park County · Motorway · 16,088vehicles2,754trucks · 17.1%
Road class
Motorway
Congestion ratio
17.9%
Median trip time
45.9 min
Drivers’ median age
42.2 yrs
Drivers’ average income
$83,022

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%).

7I 90Deer Lodge County · Motorway · 11,736vehicles2,745trucks · 23.4%
Road class
Motorway
Congestion ratio
14.0%
Median trip time
43.4 min
Drivers’ median age
49.3 yrs
Drivers’ average income
$75,042

I 90 carries 2.8 times the state average on its busiest stretch, where the median trip lasts 43.4 minutes.

8Last Chance Gulch StreetLewis and Clark County · Primary road · #1 by traffic56,385vehicles2,593trucks · 4.6%
9I 90Sweet Grass County · Motorway · 11,414vehicles2,533trucks · 22.2%
Road class
Motorway
Congestion ratio
12.4%
Median trip time
70.3 min
Drivers’ median age
45.4 yrs
Drivers’ average income
$74,726

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.

10I 90Powell County · Motorway · 10,633vehicles2,422trucks · 22.8%
Road class
Motorway
Congestion ratio
12.3%
Median trip time
61.3 min
Drivers’ median age
45.8 yrs
Drivers’ average income
$70,948

I 90 carries through traffic: the median trip using it lasts 61.3 minutes, against 36.2 for the state.

How to read these road counts
  • The first number is AADT, annual average daily traffic: the vehicles passing a point on an average day, both directions combined and trucks included. On a divided highway both carriageways are added together.
  • Traffic changes along a road, with more near interchanges and towns and less in open country. Every figure for a road describes its busiest stretch in the county, so the two rankings show the same numbers for the same road.
  • The second number is the trucks on that stretch, a part of its AADT. The bar splits the AADT into cars and light vehicles (blue) and trucks (amber).
  • See segment-level AADT for any road on TrafficZoom.

Data Sources & Methodology

The data presented on this page is derived from TrafficZoom's proprietary analytics platform, which aggregates and normalizes information from multiple sources, including:

Mobile device location data (anonymized and aggregated)

Road sensor networks and traffic counters

Historical traffic pattern databases

Public traffic count programs published by the

MontanaDepartment of Transportation

Demographic Baseline for O-D Modeling

U.S. Census Bureau
All metrics represent estimates based on statistical modeling and are intended for strategic planning purposes.
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Data current as of:
Q3 2026

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States near Montana

The same traffic breakdown for the states closest to Montana.

Need segment-level traffic data?

Identify traffic patterns street by street and analyze the exact corridors that matter to your project.

Counties in Montana

Traffic counts, truck share, congestion and driver demographics for each of the 56 counties TrafficZoom measures in Montana.