Need segment-level traffic data?

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

Get insights →
Traffic heat map of Missoula County, Montana: 466 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Reserve Street and Russell Street

Missoula County, Montana Traffic Counts

Traffic analytics for Missoula County, Montana, calculated from real-world mobile and sensor networks on 6,980 road segments (466 road miles, about 353 ft each). It has the busiest roads of any county in Montana, averaging 7,276 vehicles a day. Use the figures below to move from assumptions to certainty on retail locations, logistics and road planning.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
Updated:
September 29, 2026
Find my place
total traffic icon

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
Trucks

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

9.8%
Average travel time

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

35.0 min
Congestion ratio

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

16.8%
Drivers’ average age

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

42.7 yrs
Drivers’ average income

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

$75,921

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 icon

Highway Traffic in Missoula County, Montana

Trafficvehicles per day13,747
Trucks12.4%
Average travel time33.2 min
Congestion ratio23.8%
Drivers’ average age44.0 yrs
Drivers’ average income$76,573

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 icon

Non-highway Traffic in Missoula County, Montana

Trafficvehicles per day5,836
Trucks5.7%
Average travel time35.4 min
Congestion ratio15.2%
Drivers’ average age41.2 yrs
Drivers’ average income$75,246

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.

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 15% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +20% versus the annual average.
Lowest month:
January is the quietest month, with volumes -23% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Missoula County, Montana, the peak hour concentrates about 7% of the day's traffic, and there is a strong seasonal swing of +20% in high season.

Missoula County vs. Montana Traffic Comparison

Of the four measures, average daily traffic per road differs most: Missoula County runs 73% above the Montana average. Its highway truck share, by contrast, is 17% below.

MetricMissoula CountyMontana averageDifference
Traffic7,2764,202+73.1%
Truck % (Total Traffic)9.8%11.7%-16.4%
Truck % (Highway)12.4%15.0%-17.4%
Avg. Travel Time35.0 min36.2 min-3.3%

How Missoula County compares

Missoula County moves more traffic than any nearby county

Set against the average of the 4 areas nearest to it, Missoula County carries 189.0% more traffic on a typical road and is 133.2% more congested; it has the busiest roads of the five. It is where traffic concentrates in this corner of the map - the local bottleneck, with more vehicles per road AND less room to absorb them.

Missoula County and the 4 nearest county-level areas by centroid distance, with the Montana average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Missoula County7,2769.8%2,532,44735.0 min16.8%
Powell County, Montana2,32720.1%584,98442.1 min6.7%
Lake County, Montana4,3079.1%875,23739.6 min10.6%
Mineral County, Montana1,95725.8%513,08648.6 min6.4%
Granite County, Montana1,47919.0%486,49929.9 min5.1%
Montana average4,20211.7%N/A36.2 min12.3%

Missoula County ranked within Montana

Missoula County records the state's highest average daily traffic volume and highway travel volume - 2 first places in one county.

Missoula County ranked among 56 county-level areas in Montana (1 = highest); measures without data in every county rank a smaller field, down to 47.
MeasureMissoula CountyMontana rank
Traffic volume (AADT)7,276#1 of 56
Highway vehicle-miles per day1,541,691#1 of 47
Truck share on highways12.4%#35 of 47
Highway trucks per day1,702#9 of 47
Average travel time35.0 min#47 of 56
Average driver income$75,921#9 of 56
Average driver age42.7 yrs#54 of 56

The two ends of this table sit far apart: #1 of 56 on average daily traffic volume, against #54 of 56 on average driver age.

Busiest roads in Missoula County, Montana

Traffic concentrates on a few corridors: the three busiest roads average 26,995 vehicles a day, against 7,276 on the average road in Missoula County.

Reserve Street leads with 34,189 vehicles a day, 1,309 of them trucks (3.8%). I 90 carries the most trucks, 2,413 a day (10.8% of its traffic), although it ranks #3 for all traffic.

Few trucks use Reserve Street: 3.8% of its traffic, under half the county's 9.8%.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Reserve StreetTrunk 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

Reserve Street is one of the more congested roads here: trips take 44% longer than at free-flow speed, against 17% county-wide.

2Russell StreetSecondary road · 24,363vehicles1,000trucks · 4.1%
Road class
Secondary road
Congestion ratio
37.5%
Median trip time
40.9 min
Drivers’ median age
41.7 yrs
Drivers’ average income
$63,153

Delays build on Russell Street: its congestion ratio of 37% over free-flow time is well above the county's 17%.

3I 90Motorway · 22,432vehicles2,413trucks · 10.8%
Road class
Motorway
Congestion ratio
22.3%
Median trip time
27.7 min
Drivers’ median age
42.5 yrs
Drivers’ average income
$76,844

I 90 peaks at 22,432 vehicles a day, 3.1 times the county average; trucks are 10.8% of it, above the county-wide 9.8%.

4Brooks StreetTrunk road · 22,162vehicles1,014trucks · 4.6%
Road class
Trunk road
Congestion ratio
28.5%
Median trip time
34.0 min
Drivers’ median age
43.7 yrs
Drivers’ average income
$75,171

Brooks Street carries 3.0 times the county average at its busiest, 1,014 of them trucks (4.6%, below the county-wide 9.8%).

5Broadway StreetTrunk road · 21,906vehicles1,532trucks · 7.0%
Road class
Trunk road
Congestion ratio
25.0%
Median trip time
34.1 min
Drivers’ median age
40.6 yrs
Drivers’ average income
$72,253

Broadway Street carries 3.0 times the county average on its busiest stretch, where the median trip lasts 34.1 minutes.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 90Motorway · #3 by traffic22,432vehicles2,413trucks · 10.8%
2Broadway StreetTrunk road · #5 by traffic21,906vehicles1,532trucks · 7.0%
3Bitteroot RoadTrunk road · 19,718vehicles1,386trucks · 7.0%
Road class
Trunk road
Congestion ratio
21.6%
Median trip time
33.9 min
Drivers’ median age
45.8 yrs
Drivers’ average income
$77,023

At 2.7 times the county average, Bitteroot Road draws drivers from neighborhoods averaging $77,023 in household income.

4Reserve StreetTrunk road · #1 by traffic34,189vehicles1,309trucks · 3.8%
5US 12Trunk road · 19,852vehicles1,290trucks · 6.5%
Road class
Trunk road
Congestion ratio
23.1%
Median trip time
32.8 min
Drivers’ median age
46.7 yrs
Drivers’ average income
$76,133

The busiest stretch of US 12 carries 2.7 times the county average; trucks are 6.5% of it, below the county-wide 9.8%.

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

MissoulaDepartment 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.
link arrow icon
Data current as of:
Q3 2026

Explore further

TrafficZoom platform

— street-level analytics and custom corridor reports.

Map AI

— demographics, housing and mobility data.

Counties near Missoula County

The same traffic breakdown for the areas closest to Missoula County, Montana.

Need segment-level traffic data?

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