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Traffic heat map of Beaverhead County, Montana: 320 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 15 Business and Atlantic Street

Beaverhead County, Montana Traffic Counts

How busy are the roads of Beaverhead County, Montana? We measure 320 road miles, divided into 851 segments, with multi-sourced, cross-verified mobile and sensor data. Its busiest road, I 15 Business, carries 7,612 vehicles a day, 4.6 times the average road. The breakdown below covers volume, trucks, congestion and driver profiles for retailers, logistics planners and engineers.
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 Beaverhead County, Montana

Traffic

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

vehicles per day1,643
Trucks

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

15.9%
Average travel time

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

35.2 min
Congestion ratio

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

6.5%
Drivers’ average age

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

46.6 yrs
Drivers’ average income

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

$56,324

The average monitored road in Beaverhead County, Montana carries 1,643 vehicles per day. Across its 320 miles of monitored roads, that adds up to 448,606 vehicle-miles traveled per day (≈164 million per year). At 15.9%, the truck share runs above the 11.7% across Montana: about 1 in 6 vehicles.

Traffic 61% below the Montana average

Beaverhead's average daily traffic volume is 61% lower than the state average - 1,643 vehicles per day against 4,202 - suggesting less traffic load per road - very light roads: easy truck access, but little passing trade for roadside retail. Network-wide, Beaverhead accounts for about 1.6% of Montana's statewide total of vehicle-miles. 55% of counties in Montana see more traffic than Beaverhead's 1,643 vehicles per day.

The average trip takes 35.2 minutes, on par with the state level. 80% of counties in Montana have a longer average travel time than Beaverhead's 35.2 minutes.

At 47% lower than the state level, the 6.5% congestion ratio signals smoother traffic flow - fewer delays make delivery windows more reliable.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Beaverhead County, Montana

Trafficvehicles per day1,364
Trucks17.8%
Average travel time53.2 min
Congestion ratio3.9%
Drivers’ average age47.4 yrs
Drivers’ average income$57,475

Highways carry the vast majority of travel in Beaverhead County, Montana, 81% of all vehicle-miles. The average highway carries 1,364 vehicles per day, 22% less than the average non-highway road in the same area, which carries 1,739 vehicles per day.

Highways also make up about 75% of the monitored road miles: 239 miles in 218 segments, together carrying 364,903 vehicle-miles traveled per day (≈133 million per year).

That is more highway travel volume than 63% of counties in Montana.

Fewer highway trucks than 70% of counties in Montana

Highway truck concentration here runs 19% higher than the state average, at 17.8%. Highways here lean toward freight, so highway access is a real asset for logistics operators.

By truck concentration, highways here outrank 67% of counties in Montana. By raw truck volume, Beaverhead carries fewer highway trucks than 70% of counties in Montana.

non-highway traffic icon

Non-highway Traffic in Beaverhead County, Montana

Trafficvehicles per day1,739
Trucks7.9%
Average travel time29.0 min
Congestion ratio7.4%
Drivers’ average age46.5 yrs
Drivers’ average income$55,509

At 19% of vehicle-miles, local roads carry a smaller share of the traffic in Beaverhead County, Montana than highways. On the average non-highway road, that comes to 1,739 vehicles per day.

Local roads make up 25% of the monitored road miles (81 miles in 633 segments) but carry less than their share of travel: 83,703 vehicle-miles traveled per day (≈30.6 million per year). About 1 in 13 vehicles on non-highway roads is a truck (7.9%).

Drivers from lower-income areas than 89% of counties in Montana

The concentration of trucks on non-highway roads is 55% lower than on highways.

At 39% lower than the state level, the non-highway congestion ratio of 7.4% signals easier movement on local roads.

Trip origins here have lower average income than 89% of counties in Montana. 84% of counties in Montana have an older driver population than Beaverhead.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 10:00 AM–12:00 PM and a long afternoon plateau from 2:00 PM to 6:00 PM, with volumes reaching approximately 69% higher than the daily average.
Weekend traffic:
Weekend traffic is about as busy as on weekdays (-1%): leisure and through trips largely replace the commute.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +24% 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 Beaverhead County, Montana, the peak hour concentrates about 7% of the day's traffic, and there is a strong seasonal swing of +24% in high season.

Beaverhead County vs. Montana Traffic Comparison

Of the four measures, average daily traffic per road differs most: Beaverhead County runs 61% below the Montana average. Its truck share, by contrast, is 37% above.

MetricBeaverhead CountyMontana averageDifference
Traffic1,6434,202-60.9%
Truck % (Total Traffic)15.9%11.7%+36.7%
Truck % (Highway)17.8%15.0%+18.8%
Avg. Travel Time35.2 min36.2 min-2.8%

How Beaverhead County compares

Beaverhead County against nearby counties

Set against the average of the 4 areas nearest to it, Beaverhead County carries 37.8% less traffic on a typical road; it has the quietest roads of the five.

Beaverhead 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
Beaverhead County1,64315.9%448,60635.2 min6.5%
Silver Bow County, Montana4,14712.6%726,86738.7 min11.7%
Lemhi County, Idaho2,4319.1%127,81329.5 minN/A
Madison County, Montana1,7979.7%381,41641.8 min5.7%
Deer Lodge County, Montana2,19717.0%298,40132.2 min8.2%
Montana average4,20211.7%N/A36.2 min12.3%

Beaverhead County ranked within Montana

Average driver income places Beaverhead County #50 of 56 in Montana - the bottom quarter of the state.

Beaverhead County ranked among 56 county-level areas in Montana (1 = highest); measures without data in every county rank a smaller field, down to 47.
MeasureBeaverhead CountyMontana rank
Traffic volume (AADT)1,643#31 of 56
Highway vehicle-miles per day364,903#18 of 47
Truck share on highways17.8%#16 of 47
Highway trucks per day243#33 of 47
Average travel time35.2 min#45 of 56
Average driver income$56,324#50 of 56
Average driver age46.6 yrs#47 of 56

Busiest roads in Beaverhead County, Montana

On their busiest stretches, the three busiest roads in Beaverhead County carry 6,149 vehicles a day on average, 3.7 times the typical road in the county (1,643).

I 15 Business leads with 7,612 vehicles a day, 335 of them trucks (4.4%). I 15 carries the most trucks, 546 a day (18.4% of its traffic), although it ranks #5 for all traffic.

I 15 Business is busy with cars rather than freight: only 4.4% of its traffic is trucks, against 15.9% county-wide.

Trips using I 15 are long: a median of 48.1 minutes against 35.2 county-wide, the mark of a through route.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 15 BusinessPrimary road · 7,612vehicles335trucks · 4.4%
Road class
Primary road
Congestion ratio
17.4%
Median trip time
27.1 min
Drivers’ median age
47.8 yrs
Drivers’ average income
$54,876

Travel on I 15 Business's busiest stretch runs 17% over free-flow time, against 7% across the county, so expect slower peak hours.

2Atlantic StreetPrimary road · 6,262vehicles337trucks · 5.4%
Road class
Primary road
Congestion ratio
14.3%
Median trip time
31.1 min
Drivers’ median age
47.7 yrs
Drivers’ average income
$61,680

At 3.8 times the county average, Atlantic Street draws drivers from neighborhoods averaging $61,680 in household income.

3Helena StreetPrimary road · 4,572vehicles214trucks · 4.7%
Road class
Primary road
Congestion ratio
10.5%
Median trip time
25.9 min
Drivers’ median age
45.9 yrs
Drivers’ average income
$58,840

Helena Street is a local road at heart: the median trip using it lasts 25.9 minutes, against 35.2 for the county.

4I 15 BusPrimary road · 3,729vehicles184trucks · 4.9%
Road class
Primary road
Congestion ratio
8.3%
Median trip time
30.8 min
Drivers’ median age
44.4 yrs
Drivers’ average income
$46,330

The busiest stretch of I 15 Bus carries 2.3 times the county average; trucks are 4.9% of it, below the county-wide 15.9%.

5I 15Motorway · 2,969vehicles546trucks · 18.4%
Road class
Motorway
Congestion ratio
3.5%
Median trip time
48.1 min
Drivers’ median age
47.4 yrs
Drivers’ average income
$57,475

At 81% more than the county average, I 15 draws drivers from neighborhoods averaging $57,475 in household income.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 15Motorway · #5 by traffic2,969vehicles546trucks · 18.4%
2Atlantic StreetPrimary road · #2 by traffic6,262vehicles337trucks · 5.4%
3I 15 BusinessPrimary road · #1 by traffic7,612vehicles335trucks · 4.4%
4Helena StreetPrimary road · #3 by traffic4,572vehicles214trucks · 4.7%
5MT 41Primary road · 2,001vehicles200trucks · 10.0%
Road class
Primary road
Congestion ratio
6.4%
Median trip time
33.7 min
Drivers’ median age
46.1 yrs
Drivers’ average income
$54,826

MT 41 is busy by local standards, at 22% more than the county average on its busiest stretch; trucks are 10.0% of it, below the county-wide 15.9%.

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

BeaverheadDepartment 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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Counties near Beaverhead County

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

Need segment-level traffic data?

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