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Traffic heat map of Clark County, Idaho: 175 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 15 and Veteran's Memorial Highway

Clark County, Idaho Traffic Counts

TrafficZoom tracks traffic on 175 road miles in Clark County, Idaho, divided into 236 segments averaging 3,922 ft. Its roads are the quietest of any county in Idaho, at 405 vehicles a day on average. 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 icon

Total Traffic Volume & Performance in Clark County, Idaho

Traffic

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

vehicles per day405
Trucks

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

17.0%
Average travel time

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

72.5 min
Drivers’ average age

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

46.0 yrs
Drivers’ average income

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

$53,022

A typical monitored road in Clark County, Idaho sees 405 vehicles per day, while its 175 miles of monitored roads together handle 153,825 vehicle-miles traveled per day (≈56.1 million per year). About 1 in 6 vehicles is a truck, well above the 9.7% across Idaho - a freight-heavy mix.

The quietest roads of any county in Idaho

Clark's average daily traffic volume is 93% lower than the state average - 405 vehicles per day against 5,734 - suggesting less traffic load per road - quiet roads that suit freight movement more than drive-by retail. In total volume terms, its road network carries about 0.3% of Idaho's statewide total of vehicle-miles. At 405 vehicles per day, Clark posts the lowest average traffic volume in Idaho.

The average trip takes 72.5 minutes, 114% higher than the state level. It also posts the highest average travel time in Idaho, at 72.5 minutes.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Clark County, Idaho

Trafficvehicles per day897
Trucks16.7%
Average travel time62.0 min
Drivers’ average age46.2 yrs
Drivers’ average income$53,118

The vast majority of driving in Clark County, Idaho happens on highways: 89% of all vehicle-miles. The average highway carries 897 vehicles per day, 229% more than the average non-highway road in the same area, which carries 273 vehicles per day.

Highways make up 57% of the monitored road miles (99 miles, 50 segments), so they carry more than their share: 137,537 vehicle-miles traveled per day (≈50.2 million per year).

Fewer highway trucks than 94% of counties in Idaho

The concentration of trucks on highways (16.7%) is 19% higher than the state average for similar road classifications. Highways here lean toward freight, so highway access is a real asset for logistics operators.

By truck concentration, highways here outrank 79% of counties in Idaho. 94% of counties in Idaho see more highway trucks per day than Clark's roughly 150.

non-highway traffic icon

Non-highway Traffic in Clark County, Idaho

Trafficvehicles per day273
Trucks19.2%
Average travel time75.4 min
Drivers’ average age45.1 yrs
Drivers’ average income$52,180

Only a small share of travel in Clark County, Idaho happens on local roads: 11% of vehicle-miles. A typical local road sees 273 vehicles per day.

Spread over 76 miles and 186 segments, 43% of the road network, local roads carry a lighter load per mile: 16,289 vehicle-miles traveled per day (≈5.9 million per year). About 1 in 5 vehicles on non-highway roads is a truck (19.2%).

Drivers from lower-income areas than 93% of counties in Idaho

Unusually, compared to highways, non-highway routes see 15% more trucks by share.

93% of counties in Idaho see higher average driver income among trip origins than Clark. The driver population here skews younger than 51% of counties in Idaho.

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 12:00 PM to 6:00 PM, with volumes reaching approximately 75% higher than the daily average.
Weekend traffic:
Weekend traffic is about as busy as on weekdays (-2%): leisure and through trips largely replace the commute.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +34% versus the annual average.
Lowest month:
January is the quietest month, with volumes -42% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Clark County, Idaho, the peak hour concentrates about 7% of the day's traffic, and there is a strong seasonal swing of +34% in high season.

Clark County vs. Idaho Traffic Comparison

Of the four measures, average travel time differs most: Clark County runs 114% above the Idaho average. Its average daily traffic per road, by contrast, is 93% below.

MetricClark CountyIdaho averageDifference
Traffic4055,734-92.9%
Truck % (Total Traffic)17.0%9.7%+75.6%
Truck % (Highway)16.7%14.1%+18.5%
Avg. Travel Time72.5 min33.8 min+114.4%

How Clark County compares

Clark County has the quietest roads among its nearby counties

Compared with its 4 closest neighbours, Clark County carries 86.8% less traffic on a typical road and sees 104.8% longer typical trips; it has the quietest 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.

Clark 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
Clark County40517.0%153,82572.5 minN/A
Jefferson County, Idaho2,8528.4%692,37029.4 min8.2%
Madison County, Idaho4,3526.9%822,40333.5 min7.1%
Fremont County, Idaho2,9768.2%620,28037.9 minN/A
Butte County, Idaho2,09011.2%255,69840.9 minN/A
Idaho average5,7349.7%N/A33.8 min16.0%

Clark County ranked within Idaho

On average travel time, Clark County tops the Idaho field outright.

Clark County ranked among 44 county-level areas in Idaho (1 = highest); measures without data in every county rank a smaller field, down to 35.
MeasureClark CountyIdaho rank
Traffic volume (AADT)405#44 of 44
Highway vehicle-miles per day137,537#28 of 35
Truck share on highways16.7%#8 of 35
Highway trucks per day150#33 of 35
Average travel time72.5 min#1 of 44
Average driver income$53,022#41 of 44
Average driver age46.0 yrs#23 of 44

Clark County ranks #1 of 44 on average travel time but #44 of 44 on average daily traffic volume. Some of the longest trips in Idaho on some of its emptiest roads - distance, not congestion, is what sets travel time here.

Busiest roads in Clark County, Idaho

On their busiest stretches, the three busiest roads in Clark County carry 2,127 vehicles a day on average, 5.3 times the typical road in the county (405).

I 15 is the busiest road, at 3,226 vehicles a day, 509 of them trucks (15.8%). It tops the truck ranking too, with the most trucks.

Trucks make up 36.8% of traffic on CR A-2, against 17.0% across all roads in the county.

Few trucks use Main Street: 5.5% of its traffic, under half the county's 17.0%.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 15Motorway · 3,226vehicles509trucks · 15.8%
Road class
Motorway
Median trip time
58.4 min
Drivers’ median age
41.6 yrs
Drivers’ average income
$50,583

I 15 carries 8.0 times the county average at its busiest, 509 of them trucks (15.8%, below the county-wide 17.0%).

2Veteran's Memorial HighwayMotorway · 2,563vehicles441trucks · 17.2%
Road class
Motorway
Median trip time
61.2 min
Drivers’ median age
47.8 yrs
Drivers’ average income
$53,505

Veteran's Memorial Highway carries 6.3 times the county average on its busiest stretch, where the median trip lasts 61.2 minutes.

3Main StreetTertiary road · 593vehicles32trucks · 5.5%
Road class
Tertiary road
Median trip time
68.2 min
Drivers’ median age
45.6 yrs
Drivers’ average income
$52,702

Main Street carries 46% more than the county average on its busiest stretch, where the median trip lasts 68.2 minutes.

4ID 28Primary road · 315vehicles68trucks · 21.8%
Road class
Primary road
Median trip time
92.3 min

Even at its busiest, ID 28 carries 22% less than the county average; trucks are 21.8% of it, above the county-wide 17.0%.

5ID 22Secondary road · 293vehicles35trucks · 11.8%
Road class
Secondary road
Median trip time
77.6 min
Drivers’ median age
44.3 yrs
Drivers’ average income
$52,083

ID 22 is a quieter road: its busiest stretch carries 28% less than the county average; trucks are 11.8% of it, below the county-wide 17.0%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 15Motorway · #1 by traffic3,226vehicles509trucks · 15.8%
2Veteran's Memorial HighwayMotorway · #2 by traffic2,563vehicles441trucks · 17.2%
3ID 28Primary road · #4 by traffic315vehicles68trucks · 21.8%
4CR A-2Tertiary road · 114vehicles42trucks · 36.8%
Road class
Tertiary road
Median trip time
66.7 min

Even at its busiest, CR A-2 carries 72% less than the county average; trucks are 36.8% of it, above the county-wide 17.0%.

5ID 22Secondary road · #5 by traffic293vehicles35trucks · 11.8%
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

ClarkDepartment 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 Clark County

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

Need segment-level traffic data?

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