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Traffic heat map of Gallatin County, Montana: 629 miles of roads shaded from blue (light) to red (heavy traffic), busiest on 19th Avenue and Huffine Lane

Gallatin County, Montana Traffic Counts

How busy are the roads of Gallatin County, Montana? We measure 629 road miles, divided into 7,263 segments, with multi-sourced, cross-verified mobile and sensor data. Its drivers come from the highest-income neighborhoods of any county in Montana, averaging $90,275. 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 Volume & Performance in Gallatin County, Montana

Traffic

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

vehicles per day5,024
Trucks

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

9.0%
Average travel time

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

29.2 min
Congestion ratio

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

16.6%
Drivers’ average age

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

38.5 yrs
Drivers’ average income

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

$90,275

Our data shows 5,024 vehicles per day on the average road in Gallatin County, Montana, and 2,700,371 vehicle-miles traveled per day (≈986 million per year) across its 629 miles of monitored roads. About 1 in 11 vehicles is a truck, fewer than the 1 in 9 across Montana.

Shorter trips than 98% of counties in Montana

At 5,024 vehicles per day, the average monitored road in Gallatin carries 20% more traffic than the state average of 4,202, suggesting more demand on each road - a critical factor for logistics and site planning. In total volume terms, its road network carries about 9.5% of Montana's statewide total of vehicle-miles. By volume, Gallatin's 5,024 vehicles per day outpaces 95% of counties in Montana.

Journey times run 19% lower than the state level, at 29.2 minutes on average. Its average travel time of 29.2 minutes is shorter than 98% of counties in Montana.

At 36% higher than the state level, the 16.6% congestion ratio signals more pronounced congestion - expect slower peak-hour deliveries and less predictable arrival times.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Gallatin County, Montana

Trafficvehicles per day10,160
Trucks12.4%
Average travel time32.4 min
Congestion ratio24.9%
Drivers’ average age39.1 yrs
Drivers’ average income$86,814

Travel in Gallatin County, Montana splits roughly evenly, with about half of it (53% of vehicle-miles) on highways. The average highway carries 10,160 vehicles per day, 150% more than the average non-highway road in the same area, which carries 4,060 vehicles per day.

Highways make up 30% of the monitored road miles (189 miles, 1,147 segments), so they carry more than their share: 1,433,180 vehicle-miles traveled per day (≈523 million per year).

That puts Gallatin among the top 3 counties in Montana for highway travel volume.

More highway trucks than 89% of counties in Montana

At 12.4%, highway truck share is 17% lower than the state average. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.

By truck concentration, highways here trail 76% of counties in Montana. By raw truck volume, Gallatin carries more highway trucks than 89% of counties in Montana.

non-highway traffic icon

Non-highway Traffic in Gallatin County, Montana

Trafficvehicles per day4,060
Trucks5.2%
Average travel time28.6 min
Congestion ratio15.1%
Drivers’ average age38.1 yrs
Drivers’ average income$92,904

Travel in Gallatin County, Montana splits roughly evenly, with about half of it (47% of vehicle-miles) on local roads. A typical local road sees 4,060 vehicles per day.

Spread over 440 miles and 6,116 segments, 70% of the road network, local roads carry a lighter load per mile: 1,267,192 vehicle-miles traveled per day (≈463 million per year). The truck share on non-highway roads is 5.2%.

The highest driver income of any county in Montana

Non-highway roads carry a truck concentration that's 58% lower than the highway network.

Non-highway congestion (15.1%) runs 25% higher than the state average, pointing to slower local traffic flow.

At $90,275, the average driver income for trips originating here is the highest in Montana. Drivers here also skew toward the lowest median age in Montana, at 38 years.

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 86% 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:
June–August is the high season, with volumes +49% versus the annual average.
Lowest month:
December is the quietest month, with volumes -39% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Gallatin County, Montana, the peak hour concentrates about 8% of the day's traffic, and there is a strong seasonal swing of +49% in high season.

Gallatin County vs. Montana Traffic Comparison

Of the four measures, truck share differs most: Gallatin County runs 23% below the Montana average. Its average daily traffic per road, by contrast, is 20% above.

MetricGallatin CountyMontana averageDifference
Traffic5,0244,202+19.5%
Truck % (Total Traffic)9.0%11.7%-22.9%
Truck % (Highway)12.4%15.0%-17.5%
Avg. Travel Time29.2 min36.2 min-19.4%

How Gallatin County compares

Gallatin County moves more traffic than any nearby county

Set against the average of the 4 areas nearest to it, Gallatin County moves 4.7 times the total daily travel and carries 115.9% more traffic on a typical road; it has the busiest roads of the five. Busier roads and shorter trips together - destinations here sit closer to one another than in the areas around it.

Gallatin 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
Gallatin County5,0249.0%2,700,37129.2 min16.6%
Madison County, Montana1,7979.7%381,41641.8 min5.7%
Park County, Montana2,85815.1%797,61336.6 min10.1%
Fremont County, Idaho2,9768.2%620,28037.9 minN/A
Sweet Grass County, Montana1,67520.8%510,31543.6 min6.1%
Montana average4,20211.7%N/A36.2 min12.3%

Gallatin County ranked within Montana

No other county-level area in Montana records a higher average driver income than Gallatin County.

Gallatin County ranked among 56 county-level areas in Montana (1 = highest); measures without data in every county rank a smaller field, down to 47.
MeasureGallatin CountyMontana rank
Traffic volume (AADT)5,024#4 of 56
Highway vehicle-miles per day1,433,180#2 of 47
Truck share on highways12.4%#36 of 47
Highway trucks per day1,256#6 of 47
Average travel time29.2 min#55 of 56
Average driver income$90,275#1 of 56
Average driver age38.5 yrs#56 of 56

Gallatin County ranks #4 of 56 on average daily traffic volume but #55 of 56 on average travel time. Heavy traffic and short trips together: a compact network where destinations sit close to one another.

Busiest roads in Gallatin County, Montana

The three busiest roads in Gallatin County average 25,273 vehicles a day, 5.0 times the county average of 5,024 across all its monitored roads.

19th Avenue leads with 28,078 vehicles a day, 984 of them trucks (3.5%). I 90 carries the most trucks, 2,887 a day (14.1% of its traffic), although it ranks #5 for all traffic.

19th Avenue is busy with cars rather than freight: only 3.5% of its traffic is trucks, against 9.0% county-wide.

Freight stands out on I 90: trucks are 14.1% of the traffic there, against 9.0% county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
119th AvenuePrimary 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

Travel on 19th Avenue's busiest stretch runs 41% over free-flow time, against 17% across the county, so expect slower peak hours.

2Huffine LaneTrunk road · 26,626vehicles1,226trucks · 4.6%
Road class
Trunk road
Congestion ratio
31.2%
Median trip time
28.5 min
Drivers’ median age
38.7 yrs
Drivers’ average income
$95,760

Huffine Lane carries 5.3 times the county average on its busiest stretch, where the median trip lasts 28.5 minutes.

3Amsterdam RoadPrimary road · 21,115vehicles1,176trucks · 5.6%
Road class
Primary road
Congestion ratio
41.3%
Median trip time
27.2 min
Drivers’ median age
41.1 yrs
Drivers’ average income
$86,319

Amsterdam Road is one of the more congested roads here: trips take 41% longer than at free-flow speed, against 17% county-wide.

4Main StreetTrunk road · 21,061vehicles859trucks · 4.1%
Road class
Trunk road
Congestion ratio
32.4%
Median trip time
36.2 min
Drivers’ median age
38.7 yrs
Drivers’ average income
$87,053

Main Street carries 4.2 times the county average on its busiest stretch, where the median trip lasts 36.2 minutes.

5I 90Motorway · 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

At 4.1 times the county average, I 90 draws drivers from neighborhoods averaging $83,934 in household income.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 90Motorway · #5 by traffic20,491vehicles2,887trucks · 14.1%
2Jackrabbit LanePrimary road · 19,969vehicles1,384trucks · 6.9%
Road class
Primary road
Congestion ratio
38.6%
Median trip time
27.5 min
Drivers’ median age
40.8 yrs
Drivers’ average income
$92,517

The busiest stretch of Jackrabbit Lane carries 4.0 times the county average; trucks are 6.9% of it, below the county-wide 9.0%.

3Huffine LaneTrunk road · #2 by traffic26,626vehicles1,226trucks · 4.6%
4Amsterdam RoadPrimary road · #3 by traffic21,115vehicles1,176trucks · 5.6%
519th AvenuePrimary road · #1 by traffic28,078vehicles984trucks · 3.5%
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

GallatinDepartment 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 Gallatin County

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

Need segment-level traffic data?

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