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Traffic heat map of Nez Perce County, Idaho: 236 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Thain Road and 21st Street

Nez Perce County, Idaho Traffic Counts

Traffic analytics for Nez Perce County, Idaho, calculated from real-world mobile and sensor networks on 2,353 road segments (236 road miles, about 530 ft each). It ranks among the top 3 counties in Idaho for average daily traffic. Use the figures below to move from assumptions to certainty on retail locations, logistics and road planning.
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 Nez Perce County, Idaho

Traffic

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

vehicles per day8,098
Trucks

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

6.4%
Average travel time

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

32.9 min
Drivers’ average age

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

49.0 yrs
Drivers’ average income

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

$73,833

A typical monitored road in Nez Perce County, Idaho sees 8,098 vehicles per day, while its 236 miles of monitored roads together handle 1,053,614 vehicle-miles traveled per day (≈385 million per year). About 1 in 16 vehicles is a truck, fewer than the 1 in 10 across Idaho.

Busier roads than 98% of counties in Idaho

At 8,098 vehicles per day, the average monitored road in Nez Perce carries 41% more traffic than the state average of 5,734, suggesting more demand on each road - a busier backdrop for retail sites, at the cost of slower access. In total volume terms, its road network carries about 2.3% of Idaho's statewide total of vehicle-miles. By volume, Nez Perce's 8,098 vehicles per day outpaces 98% of counties in Idaho.

Journey times here (32.9 minutes on average) closely track the state level. Its average travel time of 32.9 minutes is shorter than 56% of counties in Idaho.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Nez Perce County, Idaho

Trafficvehicles per day4,884
Trucks9.1%
Average travel time36.2 min
Drivers’ average age46.4 yrs
Drivers’ average income$67,693

Highways carry a significant share of travel in Nez Perce County, Idaho: 43% of all vehicle-miles. The average highway carries 4,884 vehicles per day, 45% less than the average non-highway road in the same area, which carries 8,803 vehicles per day.

Their share of road miles is similar, 42% (99 miles in 423 segments), carrying 451,056 vehicle-miles traveled per day (≈165 million per year).

56% of counties in Idaho move less traffic on their highways.

Lower highway truck share than 82% of counties in Idaho

Highway truck concentration here runs 35% lower than the state average, at 9.1%. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.

82% of counties in Idaho see a higher highway truck share than Nez Perce's 9.1%. By raw truck volume, Nez Perce carries fewer highway trucks than 71% of counties in Idaho.

non-highway traffic icon

Non-highway Traffic in Nez Perce County, Idaho

Trafficvehicles per day8,803
Trucks4.3%
Average travel time32.1 min
Drivers’ average age49.3 yrs
Drivers’ average income$76,250

A little more than half of the driving in Nez Perce County, Idaho happens on local roads: 57% of all vehicle-miles. The average non-highway road carries 8,803 vehicles per day.

Their share of road miles is similar, 58% (137 miles in 1,930 segments), carrying 602,558 vehicle-miles traveled per day (≈220 million per year). The truck share on non-highway roads is 4.3%.

Drivers from higher-income areas than 70% of counties in Idaho

Compared to highways, non-highway routes see 53% fewer trucks by share.

70% of counties in Idaho see lower average driver income among trip origins than Nez Perce. Nez Perce's median driver age is higher than 60% 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 2:00 PM to 8:00 PM, with volumes reaching approximately 70% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 19% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +10% versus the annual average.
Lowest month:
January is the quietest month, with volumes -16% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Nez Perce County, Idaho, the peak hour concentrates about 7% of the day's traffic, and there is a strong seasonal swing of +10% in high season.

Nez Perce County vs. Idaho Traffic Comparison

Nez Perce County's biggest difference from the Idaho average is its average daily traffic per road, 41% above it. Its highway truck share, by contrast, is 35% below.

MetricNez Perce CountyIdaho averageDifference
Traffic8,0985,734+41.2%
Truck % (Total Traffic)6.4%9.7%-34.2%
Truck % (Highway)9.1%14.1%-35.1%
Avg. Travel Time32.9 min33.8 min-2.9%

How Nez Perce County compares

Nez Perce County moves more traffic than any nearby county

Compared with its 4 closest neighbours, Nez Perce County carries 196.2% more traffic on a typical road and moves 5.2 times the total daily travel; it has the busiest roads of the five. Bigger and busier at once: more road than the areas around it and heavier traffic on it, which makes it the centre of gravity for travel in this part of the map.

Nez Perce 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
Nez Perce County8,0986.4%1,053,61432.9 minN/A
Asotin County, Washington3,3065.7%200,35628.8 min12.3%
Lewis County, Idaho1,91610.2%116,10127.0 minN/A
Garfield County, Washington1,87313.2%70,25157.5 min5.6%
Latah County, Idaho3,8417.5%416,48830.0 min17.3%
Idaho average5,7349.7%N/A33.8 min16.0%

Nez Perce County ranked within Idaho

On average daily traffic volume, Nez Perce County is among the three highest county-level areas in Idaho.

Nez Perce County ranked among 44 county-level areas in Idaho (1 = highest); measures without data in every county rank a smaller field, down to 35.
MeasureNez Perce CountyIdaho rank
Traffic volume (AADT)8,098#2 of 44
Highway vehicle-miles per day451,056#16 of 35
Truck share on highways9.1%#29 of 35
Highway trucks per day446#25 of 35
Average travel time32.9 min#25 of 44
Average driver income$73,833#14 of 44
Average driver age49.0 yrs#18 of 44

The two ends of this table sit far apart: #2 of 44 on average daily traffic volume, against #29 of 35 on truck share on highways.

Busiest roads in Nez Perce County, Idaho

The three busiest roads in Nez Perce County average 35,176 vehicles a day, 4.3 times the county average of 8,098 across all its monitored roads.

Thain Road leads with 38,370 vehicles a day, 1,605 of them trucks (4.2%). Memorial Bridge carries the most trucks, 2,290 a day (7.3% of its traffic), although it ranks #3 for all traffic.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Thain RoadPrimary road · 38,370vehicles1,605trucks · 4.2%
Road class
Primary road
Median trip time
31.0 min
Drivers’ median age
49.9 yrs
Drivers’ average income
$75,879

The busiest stretch of Thain Road carries 4.7 times the county average; trucks are 4.2% of it, below the county-wide 6.4%.

221st StreetPrimary road · 36,016vehicles1,442trucks · 4.0%
Road class
Primary road
Median trip time
35.6 min
Drivers’ median age
47.2 yrs
Drivers’ average income
$72,072

On its busiest stretch, 21st Street carries 4.4 times the county average; trucks are 4.0% of it, below the county-wide 6.4%.

3Memorial BridgeTrunk road · 31,142vehicles2,290trucks · 7.3%
Road class
Trunk road
Median trip time
36.0 min
Drivers’ median age
45.5 yrs
Drivers’ average income
$70,338

Memorial Bridge peaks at 31,142 vehicles a day, 3.8 times the county average; trucks are 7.3% of it, above the county-wide 6.4%.

4Bryden AvenuePrimary road · 22,537vehicles1,046trucks · 4.6%
Road class
Primary road
Median trip time
30.0 min
Drivers’ median age
50.0 yrs
Drivers’ average income
$75,292

Bryden Avenue carries 2.8 times the county average at its busiest, 1,046 of them trucks (4.6%, below the county-wide 6.4%).

5US 12Trunk road · 21,937vehicles1,540trucks · 7.0%
Road class
Trunk road
Median trip time
33.7 min
Drivers’ median age
45.9 yrs
Drivers’ average income
$72,059

US 12 carries 2.7 times the county average on its busiest stretch, where the median trip lasts 33.7 minutes.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Memorial BridgeTrunk road · #3 by traffic31,142vehicles2,290trucks · 7.3%
2Thain RoadPrimary road · #1 by traffic38,370vehicles1,605trucks · 4.2%
3US 12Trunk road · #5 by traffic21,937vehicles1,540trucks · 7.0%
421st StreetPrimary road · #2 by traffic36,016vehicles1,442trucks · 4.0%
5Bryden AvenuePrimary road · #4 by traffic22,537vehicles1,046trucks · 4.6%
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

Nez PerceDepartment 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 Nez Perce County

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

Need segment-level traffic data?

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