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Traffic heat map of Judith Basin County, Montana: 83 miles of roads shaded from blue (light) to red (heavy traffic), busiest on US 87 and US 191

Judith Basin County, Montana Traffic Counts

TrafficZoom tracks traffic on 83 road miles in Judith Basin County, Montana, divided into 424 segments averaging 1,029 ft. Trips here are the longest of any county in Montana, a median 79.6 minutes. Built from cross-verified mobile and road-sensor data, these counts help you size up a retail site, plan logistics routes or assess infrastructure needs.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
Updated:
September 29, 2026
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Total Traffic Volume & Performance in Judith Basin County, Montana

Traffic

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

vehicles per day1,425
Trucks

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

15.6%
Average travel time

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

79.6 min
Congestion ratio

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

4.0%
Drivers’ average age

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

55.9 yrs
Drivers’ average income

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

$60,822

The average monitored road in Judith Basin County, Montana carries 1,425 vehicles per day. Across its 83 miles of monitored roads, that adds up to 165,105 vehicle-miles traveled per day (≈60.3 million per year). Trucks are 15.6% of traffic, more than the 11.7% across Montana.

The longest trips of any county in Montana

Judith Basin's average daily traffic volume is 66% lower than the state average - 1,425 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. Across the whole network, that travel is about 0.6% of Montana's statewide total. 65% of counties in Montana see more traffic than Judith Basin's 1,425 vehicles per day.

The average trip takes 79.6 minutes, 120% higher than the state level. At 79.6 minutes, Judith Basin also has the highest average travel time in Montana.

At 68% lower than the state level, the 4.0% congestion ratio signals smoother traffic flow - free-flowing roads make scheduled deliveries highly predictable.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Judith Basin County, Montana

Trafficvehicles per day2,128
Trucks15.9%
Average travel time64.6 min
Congestion ratio5.2%
Drivers’ average age55.8 yrs
Drivers’ average income$61,350

Nearly all driving in Judith Basin County, Montana happens on highways: 97% of every vehicle-mile. The average highway carries 2,128 vehicles per day, 360% more than the average non-highway road in the same area, which carries 463 vehicles per day.

Highways make up 80% of the monitored road miles (66 miles, 245 segments), so they carry more than their share: 159,364 vehicle-miles traveled per day (≈58.2 million per year).

A typical mix of freight and passenger traffic

The concentration of trucks on highways (15.9%) is 6% higher than the state average for similar road classifications. The highway traffic mix is typical for Montana: neither freight- nor commuter-dominated.

By truck concentration, highways here outrank 54% of counties in Montana. 54% of counties in Montana see fewer highway trucks per day than Judith Basin's roughly 338.

non-highway traffic icon

Non-highway Traffic in Judith Basin County, Montana

Trafficvehicles per day463
Trucks8.2%
Average travel time100.1 min
Congestion ratio2.3%
Drivers’ average age56.8 yrs
Drivers’ average income$57,337

With 3% of vehicle-miles, local roads play a minor role in how Judith Basin County, Montana travels. On the average non-highway road, that comes to 463 vehicles per day.

Local roads make up 20% of the monitored road miles (17 miles in 179 segments) but carry less than their share of travel: 5,740 vehicle-miles traveled per day (≈2.1 million per year). About 1 in 12 vehicles on non-highway roads is a truck (8.2%).

Local congestion 81% below the Montana average

The concentration of trucks on non-highway roads is 48% lower than on highways.

Non-highway congestion (2.3%) runs 81% lower than the state average, pointing to smoother local traffic flow.

Judith Basin's average driver income is lower than 80% of counties in Montana. The driver population here skews older than 87% of counties in Montana.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 9:00 AM–12:00 PM and PM peak 5:00 PM–6:00 PM, with volumes reaching approximately 81% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 8% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
July–September is the high season, with volumes +31% versus the annual average.
Lowest month:
January is the quietest month, with volumes -26% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Judith Basin County, Montana, the peak hour concentrates about 8% of the day's traffic, and there is a strong seasonal swing of +31% in high season.

Judith Basin County vs. Montana Traffic Comparison

Judith Basin County's biggest difference from the Montana average is its average travel time, 120% above it. Its average daily traffic per road, by contrast, is 66% below.

MetricJudith Basin CountyMontana averageDifference
Traffic1,4254,202-66.1%
Truck % (Total Traffic)15.6%11.7%+33.9%
Truck % (Highway)15.9%15.0%+6.1%
Avg. Travel Time79.6 min36.2 min+120.1%

How Judith Basin County compares

Trips in Judith Basin County run longer than in any nearby county

Compared with its 4 closest neighbours, Judith Basin County sees 100.7% longer typical trips and is 47.8% less congested; it has the third busiest roads of the five. Freight passes through here that never reaches the areas around it: the truck share is high precisely because the local car traffic is not.

Judith Basin 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
Judith Basin County1,42515.6%165,10579.6 min4.0%
Meagher County, Montana9519.4%38,66838.5 min4.1%
Fergus County, Montana2,26211.4%213,06538.8 min8.7%
Wheatland County, Montana1,40213.4%104,44845.8 min3.6%
Cascade County, Montana4,2668.0%1,339,08735.6 min13.9%
Montana average4,20211.7%N/A36.2 min12.3%

Judith Basin County ranked within Montana

No other county-level area in Montana records a higher average travel time than Judith Basin County.

Judith Basin County ranked among 56 county-level areas in Montana (1 = highest); measures without data in every county rank a smaller field, down to 47.
MeasureJudith Basin CountyMontana rank
Traffic volume (AADT)1,425#37 of 56
Highway vehicle-miles per day159,364#30 of 47
Truck share on highways15.9%#22 of 47
Highway trucks per day338#22 of 47
Average travel time79.6 min#1 of 56
Average driver income$60,822#45 of 56
Average driver age55.9 yrs#8 of 56

The two ends of this table sit far apart: #1 of 56 on average travel time, against #45 of 56 on average driver income.

Busiest roads in Judith Basin County, Montana

The three busiest roads in Judith Basin County average 1,870 vehicles a day, 31% more than the county average of 1,425 across all its monitored roads.

US 87 is the busiest road, at 2,480 vehicles a day, 394 of them trucks (15.9%). It also carries the most trucks.

Trips using 3rd Street are long: a median of 159.6 minutes against 79.6 county-wide, the mark of a through route.

3rd Street is busy with cars rather than freight: only 7.3% of its traffic is trucks, against 15.6% county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1US 87Trunk road · 2,480vehicles394trucks · 15.9%
Road class
Trunk road
Congestion ratio
5.4%
Median trip time
66.2 min
Drivers’ median age
55.9 yrs
Drivers’ average income
$60,989

US 87 peaks at 2,480 vehicles a day, 74% more than the county average; trucks are 15.9% of it, in line with the county-wide 15.6%.

2US 191Trunk road · 2,317vehicles253trucks · 10.9%
Road class
Trunk road
Congestion ratio
5.3%
Median trip time
44.2 min
Drivers’ median age
59.7 yrs
Drivers’ average income
$49,028

Trips on US 191 are short, a median 44.2 minutes against 79.6 county-wide, so it mostly serves local errands and commutes.

33rd StreetSecondary road · 814vehicles59trucks · 7.3%
Road class
Secondary road
Congestion ratio
2.3%
Median trip time
159.6 min
Drivers’ median age
56.7 yrs
Drivers’ average income
$59,737

Even at its busiest, 3rd Street carries 43% less than the county average; trucks are 7.3% of it, below the county-wide 15.6%.

4MT 239Tertiary road · 736vehicles38trucks · 5.1%
Road class
Tertiary road
Median trip time
48.8 min
Drivers’ median age
55.7 yrs
Drivers’ average income
$54,964

MT 239 is a local road at heart: the median trip using it lasts 48.8 minutes, against 79.6 for the county.

5Central AvenueTertiary road · 636vehicles28trucks · 4.5%
Road class
Tertiary road
Median trip time
75.8 min
Drivers’ median age
58.9 yrs
Drivers’ average income
$49,278

Central Avenue is a quieter road: its busiest stretch carries 55% less than the county average; trucks are 4.5% of it, below the county-wide 15.6%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1US 87Trunk road · #1 by traffic2,480vehicles394trucks · 15.9%
2US 191Trunk road · #2 by traffic2,317vehicles253trucks · 10.9%
33rd StreetSecondary road · #3 by traffic814vehicles59trucks · 7.3%
4MT 239Tertiary road · #4 by traffic736vehicles38trucks · 5.1%
5Central AvenueTertiary road · #5 by traffic636vehicles28trucks · 4.5%
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

Judith BasinDepartment 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 Judith Basin County

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

Need segment-level traffic data?

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