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Lemhi County, Idaho Traffic Counts

This page delivers traffic analytics for Lemhi County, Idaho. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Lemhi County, Idaho among 118 road miles divided in 503 segments. Our metrics go beyond simple volume counts to provide actionable insights on traffic intensity, congestion, commercial vehicle flow, and network performance with highest possible granularity (average segment length is 1,241 ft). Whether you are evaluating a new retail location, planning logistics routes, or assessing infrastructure needs, this data helps you move from assumptions to certainty.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
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Total Traffic Volume & Performance

Traffic

Traffic

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

2,431

Trucks

Trucks

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

9.1%

Average travel time

Average travel time

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

29.5 min

Drivers’ average age

Drivers’ average age

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

57.0 yrs

Drivers’ average income

Drivers’ average income

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

$52,508

Our data indicates an estimated average traffic volume of 2,431 vehicles per day in Lemhi County, Idaho that results in 127,813 vehicle-miles traveled per day (≈46.7 million per year). The traffic stream is comprised of an average of 1 truck for every 11 vehicles. Typical time spent behind the wheel per trip is 29.5 minutes, which already accounts for delays at signals, intersections, and congestion.

Analytical insight

When compared to the Idaho state averages: Lemhi's average daily traffic volume is 58% lower than the state average - 2,431 vehicles per day against 5,734 - suggesting less traffic load per road, a critical factor for logistics and site planning. Network-wide, Lemhi accounts for about 0.3% of Idaho's statewide total, at 127,813 vehicle-miles traveled per day (≈46.7 million per year). The average trip takes 29.5 minutes, 13% lower than the state level. Lemhi carries more traffic than 37% of counties in Idaho. Its average travel time of 29.5 minutes is longer than 12% of counties in Idaho.

Highway vs. Non-Highway Traffic Analysis

Analytical insight

N/A
non-highway traffic icon

Non-highway traffic

Traffic

Traffic

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

2,431

Trucks

Trucks

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

9.1%

Average travel time

Average travel time

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

29.5 min

Drivers’ average age

Drivers’ average age

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

57.0 yrs

Drivers’ average income

Drivers’ average income

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

$52,508

The non-highway road network in Lemhi County, Idaho supports a substantial volume of traffic. The average non-highway road carries 2,431 vehicles per day. That average covers 118 non-highway road miles divided in 503 segments (average segment length 1,241 ft), together carrying 127,813 vehicle-miles traveled per day (≈46.7 million per year). Trucks constitute 9.1% of non-highway traffic.

Analytical insight

Overall, average travel time here is longer than 12% of counties in Idaho. Lemhi's average driver income exceeds 2% of counties in Idaho. Lemhi's median driver age is higher than 95% of counties in Idaho.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 8:00 AM–12:00 PM and PM peak 12:00 PM–2:00 PM, with volumes reaching approximately 74% higher than the daily average.
Weekend traffic:
Weekend volumes run about 7% below weekday levels.
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 -32% versus the annual average.

Analytical insight

In Lemhi County, Idaho, the peak hour concentrates about 7% of the day's traffic, and seasonal swing is pronounced at +31% in high season.

Traffic Flow Profile Comparison

Metric

Lemhi

Idaho
Average

Difference

Traffic

2,431

5,734

-57.6%

Truck % (Total Traffic)

9.1%

9.7%

-5.9%

Truck % (Highway)

14.1%

Avg. Travel Time

29.5 min

33.8 min

-12.9%

How Lemhi County compares

Lemhi County against nearby areas

Against the 4 nearest areas, Lemhi County moves 30.6% of the total daily travel; it has the third busiest roads of the five. The same kind of road, just less of it: traffic per road matches the areas around it while the network itself is smaller.

Lemhi County and the 4 nearest county-level areas by centroid distance, with the Idaho average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Lemhi County2,4319.1%127,81329.5 minN/A
Beaverhead County, Montana1,64315.9%448,60635.2 min6.5%
Custer County, Idaho1,14110.7%92,31131.3 minN/A
Ravalli County, Montana4,6856.2%709,40431.9 min10.1%
Valley County, Idaho3,7807.5%421,43823.3 min9.7%
Idaho average5,7349.7%N/A33.8 min16.0%

Lemhi County ranked within Idaho

On average driver age, Lemhi County is among the three highest county-level areas in Idaho.

Where Lemhi County sits among Idaho's county-level areas on each measure. Rank 1 is the highest value in the state, whether or not that is the outcome you want; the field size differs by measure because not every county carries highway data.
MeasureLemhi CountyIdaho rank
Traffic volume (AADT)2,431#28 of 44
Average travel time29.5 min#39 of 44
Average driver income$52,508#43 of 44
Average driver age57.0 yrs#3 of 44

Lemhi County ranks #3 of 44 on average driver age but #43 of 44 on average driver income. The driver population here skews older and lower-income than most of Idaho.

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

IdahoDepartment of Transportation

Historical traffic pattern databases

U.S. Census Bureau
All metrics represent estimates based on statistical modeling and are intended for strategic planning purposes.
TrafficZoom methodology
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Data current as of:
Q3 2026

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Counties near Lemhi County

The same traffic breakdown for the areas closest to Lemhi County, Idaho.

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