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Traffic heat map of Carter County, Montana: 98 miles of roads shaded from blue (light) to red (heavy traffic), busiest on US 212 and MT 7

Carter County, Montana Traffic Counts

TrafficZoom tracks traffic on 98 road miles in Carter County, Montana, divided into 185 segments averaging 2,807 ft. The average road here carries 895 vehicles a day, 79% less than the Montana average of 4,202. 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 Carter County, Montana

Traffic

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

vehicles per day895
Trucks

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

16.4%
Average travel time

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

51.4 min
Congestion ratio

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

4.4%
Drivers’ average age

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

54.4 yrs
Drivers’ average income

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

$70,241

Our data shows 895 vehicles per day on the average road in Carter County, Montana, and 117,940 vehicle-miles traveled per day (≈43.0 million per year) across its 98 miles of monitored roads. Trucks are 16.4% of traffic, more than the 11.7% across Montana.

Traffic 79% below the Montana average

At 895 vehicles per day, the average monitored road in Carter carries 79% less traffic than the state average of 4,202, suggesting less demand on each road - quiet roads that suit freight movement more than drive-by retail. In total volume terms, its road network carries about 0.4% of Montana's statewide total of vehicle-miles. By volume, Carter's 895 vehicles per day trails 87% of counties in Montana.

At 51.4 minutes, the average travel time is 42% higher than the state level. 89% of counties in Montana have a shorter average travel time than Carter's 51.4 minutes.

Congestion runs 64% lower than the state level, at a ratio of 4.4%, which means smoother traffic flow - free-flowing roads make scheduled deliveries highly predictable.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Carter County, Montana

Trafficvehicles per day2,048
Trucks15.9%
Average travel time58.6 min
Congestion ratio4.4%
Drivers’ average age54.0 yrs
Drivers’ average income$72,296

The vast majority of driving in Carter County, Montana happens on highways: 82% of all vehicle-miles. The average highway carries 2,048 vehicles per day, 420% more than the average non-highway road in the same area, which carries 394 vehicles per day.

With 41% of the road miles (41 miles in 56 segments), highways punch above their length, carrying 96,295 vehicle-miles traveled per day (≈35.1 million per year).

A typical mix of freight and passenger traffic

Highway truck concentration here runs 6% higher than the state average, at 15.9%. The highway traffic mix is typical for Montana: neither freight- nor commuter-dominated.

Carter's highway truck share (15.9%) is higher than 57% of counties in Montana. 50% of counties in Montana see fewer highway trucks per day than Carter's roughly 326.

non-highway traffic icon

Non-highway Traffic in Carter County, Montana

Trafficvehicles per day394
Trucks18.6%
Average travel time48.2 min
Drivers’ average age60.2 yrs
Drivers’ average income$50,789

Local roads carry a smaller share of travel in Carter County, Montana, 18% of vehicle-miles; most driving happens on highways. The average non-highway road carries 394 vehicles per day.

Spread over 58 miles and 129 segments, 59% of the road network, local roads carry a lighter load per mile: 21,646 vehicle-miles traveled per day (≈7.9 million per year). About 1 in 5 vehicles on non-highway roads is a truck (18.6%).

Older drivers than 76% of counties in Montana

Unusually, compared to highways, non-highway routes see 17% more trucks by share.

Trip origins here have higher average income than 64% of counties in Montana. The driver population here skews older than 76% of counties in Montana.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

In Carter County, Montana, the peak hour concentrates about 7% of the day's traffic.

Carter County vs. Montana Traffic Comparison

The average daily traffic per road sets Carter County apart: 79% below the Montana average. Its average travel time, by contrast, is 42% above.

MetricCarter CountyMontana averageDifference
Traffic8954,202-78.7%
Truck % (Total Traffic)16.4%11.7%+40.7%
Truck % (Highway)15.9%15.0%+6.3%
Avg. Travel Time51.4 min36.2 min+42.0%

How Carter County compares

Carter County against nearby counties

Carter County tracks the 4 areas around it closely - no measure in this table sets it far apart from the areas immediately next to it, though it has the fourth busiest roads of the five. Quiet roads and long journeys - a rural pattern, where the distance between destinations rather than the traffic on the way is what takes the time.

Carter 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
Carter County89516.4%117,94051.4 min4.4%
Fallon County, Montana1,05910.5%55,08439.9 min4.1%
Harding County, South Dakota77516.8%82,68453.9 minN/A
Powder River County, Montana1,96817.5%167,76044.2 min6.3%
Bowman County, North Dakota1,04611.5%86,20136.8 min3.9%
Montana average4,20211.7%N/A36.2 min12.3%

Carter County ranked within Montana

Average travel time places Carter County #7 of 56 in Montana - the top quarter of the state.

Carter County ranked among 56 county-level areas in Montana (1 = highest); measures without data in every county rank a smaller field, down to 47.
MeasureCarter CountyMontana rank
Traffic volume (AADT)895#49 of 56
Highway vehicle-miles per day96,295#38 of 47
Truck share on highways15.9%#21 of 47
Highway trucks per day326#24 of 47
Average travel time51.4 min#7 of 56
Average driver income$70,241#21 of 56
Average driver age54.4 yrs#14 of 56

Carter County ranks #7 of 56 on average travel time but #49 of 56 on average daily traffic volume - the two describe the same roads and are worth reading together rather than either on its own.

Busiest roads in Carter County, Montana

On their busiest stretches, the three busiest roads in Carter County carry 1,108 vehicles a day on average, 24% more than the typical road in the county (895).

US 212 leads with 2,369 vehicles a day, 377 of them trucks (15.9%). That is 4.9 times the next road, MT 7 (481). It tops the truck ranking too, with the most trucks.

Trucks make up 73.8% of traffic on Belle Creek Road and 50.9% on Box Elder Road, against 16.4% across all roads in the county.

Trips using Hammond Road are long: a median of 90.0 minutes against 51.4 county-wide, the mark of a through route.

MT 7 draws drivers from lower-income areas: their neighborhoods average $50,789 in household income, 28% below the county's $70,241.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1US 212Trunk road · 2,369vehicles377trucks · 15.9%
Road class
Trunk road
Congestion ratio
4.4%
Median trip time
58.3 min
Drivers’ median age
54.0 yrs
Drivers’ average income
$72,296

US 212 carries 2.6 times the county average on its busiest stretch, where the median trip lasts 58.3 minutes.

2MT 7Secondary road · 481vehicles56trucks · 11.6%
Road class
Secondary road
Median trip time
38.8 min
Drivers’ median age
60.2 yrs
Drivers’ average income
$50,789

MT 7 is a quieter road: its busiest stretch carries 46% less than the county average; trucks are 11.6% of it, below the county-wide 16.4%.

3Box Elder RoadTertiary road · 475vehicles241trucks · 50.9%
Road class
Tertiary road
Median trip time
72.0 min

Drivers on Box Elder Road are on long journeys, a median 72.0 minutes against 51.4 county-wide: a through route more than a local street.

4S-326Secondary road · 414vehicles27trucks · 6.6%
Road class
Secondary road
Median trip time
64.1 min

Even at its busiest, S-326 carries 54% less than the county average; trucks are 6.6% of it, below the county-wide 16.4%.

5MT 323Secondary road · 339vehicles57trucks · 16.8%
Road class
Secondary road
Median trip time
52.5 min
Drivers’ median age
60.2 yrs
Drivers’ average income
$50,789

MT 323 is a quieter road: its busiest stretch carries 62% less than the county average; trucks are 16.8% of it, in line with the county-wide 16.4%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1US 212Trunk road · #1 by traffic2,369vehicles377trucks · 15.9%
2Box Elder RoadTertiary road · #3 by traffic475vehicles241trucks · 50.9%
3Belle Creek RoadTertiary road · 190vehicles140trucks · 73.8%
Road class
Tertiary road
Median trip time
17.5 min

Belle Creek Road is a local road at heart: the median trip using it lasts 17.5 minutes, against 51.4 for the county.

4Hammond RoadTertiary road · 180vehicles73trucks · 40.6%
Road class
Tertiary road
Median trip time
90.0 min

Trucks make up 40.6% of Hammond Road's traffic, against 16.4% across the county, so freight weighs heavily here.

5MT 323Secondary road · #5 by traffic339vehicles57trucks · 16.8%
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

CarterDepartment 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 Carter County

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

Need segment-level traffic data?

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