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Traffic heat map of Idaho: roads over 1,000 vehicles a day shaded from blue (light) to red (heavy traffic)

Idaho Traffic Counts

The average monitored road here carries 5,734 vehicles a day. This page breaks down traffic in Idaho across 9,966 miles of monitored roads split into 130,698 segments, using multi-sourced mobile and sensor data. It goes beyond raw counts to truck flow, congestion and who is driving, so site selection and route planning rest on evidence.
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 Idaho

Traffic

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

vehicles per day5,734
Trucks

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

9.7%
Average travel time

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

33.8 min
Congestion ratio

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

16.0%
Drivers’ average age

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

44.2 yrs
Drivers’ average income

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

$77,692

Our data shows 5,734 vehicles per day on the average road in Idaho, and 45,169,444 vehicle-miles traveled per day (≈16.5 billion per year) across its 9,966 miles of monitored roads. Trucks are 9.7% of traffic, close to the 9.3% across the US.

Longer trips than 68% of states nationwide

At 5,734 vehicles per day, the average monitored road in Idaho carries 18% less traffic than the national average of 6,986, suggesting less demand on each road - a factor worth weighing in site selection and logistics planning. Across the whole network, that travel is about 0.6% of the national total. 56% of states nationwide see more traffic than Idaho's 5,734 vehicles per day.

Journey times here (33.8 minutes on average) closely track the national level. Its average travel time of 33.8 minutes is longer than 68% of states nationwide.

Congestion runs 15% lower than the national level, at a ratio of 16.0%, which means smoother traffic flow - crucial for traffic control improvement and logistics planning.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Idaho

Trafficvehicles per day7,992
Trucks14.1%
Average travel time38.2 min
Congestion ratio29.0%
Drivers’ average age46.3 yrs
Drivers’ average income$75,771

Highways carry about half of all travel in Idaho, 48% of vehicle-miles. The average highway carries 7,992 vehicles per day, 45% more than the average non-highway road in the same area, which carries 5,519 vehicles per day.

With 26% of the road miles (2,638 miles in 11,357 segments), highways punch above their length, carrying 21,709,262 vehicle-miles traveled per day (≈7.9 billion per year).

Fewer highway trucks than 80% of states nationwide

The concentration of trucks on highways (14.1%) is 8% higher than the national average for similar road classifications. The highway traffic mix is typical for the US: neither freight- nor commuter-dominated.

60% of states nationwide see a lower highway truck share than Idaho's 14.1%. 80% of states nationwide see more highway trucks per day than Idaho's roughly 1,125.

non-highway traffic icon

Non-highway Traffic in Idaho

Trafficvehicles per day5,519
Trucks5.6%
Average travel time33.5 min
Congestion ratio16.4%
Drivers’ average age43.9 yrs
Drivers’ average income$79,773

Local roads carry about half of all travel in Idaho, 52% of vehicle-miles. A typical local road sees 5,519 vehicles per day.

Spread over 7,327 miles and 119,341 segments, 74% of the road network, local roads carry a lighter load per mile: 23,460,185 vehicle-miles traveled per day (≈8.6 billion per year). Trucks make up 5.6% of non-highway traffic, about 1 in 18 vehicles.

Younger drivers than 82% of states nationwide

Compared to highways, non-highway routes see 61% fewer trucks by share.

Non-highway congestion (16.4%) runs slightly lower than the national level (10% lower).

Trip origins here have lower average income than 78% of states nationwide. The driver population here skews younger than 82% of states nationwide.

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 80% higher than the daily average.
Weekend traffic:
Weekends are much quieter: volumes run about 20% below weekday levels, the signature of a commute-driven road network.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +12% 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 Idaho, the peak hour concentrates about 8% of the day's traffic, and there is a strong seasonal swing of +12% in high season.

Idaho vs. United States Traffic Comparison

The average daily traffic per road sets Idaho apart: 18% below the United States average.

MetricIdahoUnited States averageDifference
Traffic5,7346,986-17.9%
Truck % (Total Traffic)9.7%9.3%+3.3%
Truck % (Highway)14.1%13.1%+7.7%
Avg. Travel Time33.8 min33.3 min+1.6%

How Idaho compares

Idaho against nearby states

Idaho tracks the 4 states around it closely - no measure in this table sets it far apart from the states immediately next to it, though it has the fourth busiest roads of the five.

Idaho and the 4 nearest states by centroid distance, with the United States average for scale.
StateAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Idaho5,7349.7%45,169,44433.8 min16.0%
Montana4,20211.7%28,466,94436.2 min12.3%
Utah10,1988.9%87,040,46632.2 min21.2%
Oregon5,9089.2%86,863,90434.3 min16.6%
Washington7,3227.1%155,256,67633.2 min19.9%
United States average6,9869.3%N/A33.3 min18.9%

Busiest counties in Idaho

Together, those three counties carry 41.1% of all the vehicle-miles measured in the state.

Ranked by daily vehicle-miles, across the 44 counties in Idaho with a published traffic page. Vehicle-miles is total travel, so this ranks by traffic MOVED rather than by how busy a typical road is.
CountyDaily vehicle-milesAverage daily trafficTruck shareRoad miles
1. Ada County9,986,2289,2926.3%975
2. Canyon County4,736,8616,4667.2%746
3. Kootenai County3,854,9915,9556.7%735

Most truck-intensive counties in Idaho

Idaho's three most truck-intensive counties account for 21.8% of the truck vehicle-miles driven in the state.

Ranked by truck share of all traffic, across the same 44 counties, shown with the traffic volume that share is measured against.
CountyTruck shareTruck share on highwaysAverage daily trafficDaily vehicle-miles
1. Oneida County25.2%26.0%1,316550,519
2. Cassia County24.1%30.9%4,2381,392,072
3. Elmore County18.7%22.3%4,5582,556,881

Asking the same question of truck vehicle-miles gives a different answer - Ada County, Elmore County, Canyon County, Cassia County and Kootenai County, together 46.7% of all truck travel in Idaho.

Busiest roads in Idaho

On their busiest stretches, the top three roads on this list in Idaho carry 66,379 vehicles a day on average, 11.6 times the typical road in the state (5,734).

Vietnam Veterans Memorial Highway in Ada County tops the list with 69,114 vehicles a day, 8,241 of them trucks (11.9%). It also carries the most trucks on the list.

Freight stands out on Vietnam Veterans Memorial Highway in Oneida County and Vietnam Veterans Memorial Highway in Cassia County: trucks are 38.5% and 33.9% of the traffic there, against 9.7% state-wide.

Vietnam Veterans Memorial Highway in Oneida County carries longer journeys than most roads here, with a median trip of 73.9 minutes against 33.8 state-wide.

The truck ranking looks different from the traffic one, sharing just 3 of its 10 roads.

Ranked by daily traffic (AADT)

Only named roads are listed. Some unnamed segments, such as ramps or unlabeled carriageways, may carry as much traffic as the roads shown.

Cars and light vehiclesTrucks
1Vietnam Veterans Memorial HighwayAda County · Motorway · 69,114vehicles8,241trucks · 11.9%
Road class
Motorway
Congestion ratio
51.1%
Median trip time
34.6 min
Drivers’ median age
43.8 yrs
Drivers’ average income
$84,993

Vietnam Veterans Memorial Highway carries 12.1 times the state average on its busiest stretch, where the median trip lasts 34.6 minutes.

2Vietnam Veterans Memorial HighwayCanyon County · Motorway · 65,112vehicles5,498trucks · 8.4%
Road class
Motorway
Congestion ratio
65.1%
Median trip time
36.9 min
Drivers’ median age
43.4 yrs
Drivers’ average income
$76,455

Delays build on Vietnam Veterans Memorial Highway: its congestion ratio of 65% over free-flow time is well above the state's 16%.

3I 84Ada County · Motorway · 64,910vehicles5,182trucks · 8.0%
Road class
Motorway
Congestion ratio
55.1%
Median trip time
38.1 min
Drivers’ median age
44.0 yrs
Drivers’ average income
$89,474

At 11.3 times the state average, I 84 draws drivers from neighborhoods averaging $89,474 in household income.

4Boise ConnectorAda County · Motorway · 64,514vehicles3,008trucks · 4.7%
Road class
Motorway
Congestion ratio
48.9%
Median trip time
30.7 min
Drivers’ median age
43.5 yrs
Drivers’ average income
$83,202

A main artery: Boise Connector's busiest stretch carries 11.3 times the state average; trucks are 4.7% of it, below the state-wide 9.7%.

5Eagle RoadAda County · Trunk road · 62,963vehicles2,761trucks · 4.4%
Road class
Trunk road
Congestion ratio
59.7%
Median trip time
30.4 min
Drivers’ median age
43.8 yrs
Drivers’ average income
$94,705

Eagle Road is a trunk route for the state, carrying 11.0 times the state average on its busiest stretch; trucks are 4.4% of it, below the state-wide 9.7%.

6Blue Lakes BoulevardTwin Falls County · Primary road · 48,215vehicles1,389trucks · 2.9%
Road class
Primary road
Congestion ratio
77.7%
Median trip time
35.5 min
Drivers’ median age
44.5 yrs
Drivers’ average income
$68,212

Travel on Blue Lakes Boulevard's busiest stretch runs 78% over free-flow time, against 16% across the state, so expect slower peak hours.

74th StreetKootenai County · Primary road · 46,729vehicles1,372trucks · 2.9%
Road class
Primary road
Congestion ratio
48.4%
Median trip time
41.4 min
Drivers’ median age
48.0 yrs
Drivers’ average income
$68,067

4th Street carries 8.1 times the state average at its busiest, 1,372 of them trucks (2.9%, below the state-wide 9.7%).

8ID 55Canyon County · Trunk road · 43,503vehicles2,717trucks · 6.2%
Road class
Trunk road
Median trip time
40.1 min
Drivers’ median age
42.9 yrs
Drivers’ average income
$76,169

ID 55 carries 7.6 times the state average on its busiest stretch, where the median trip lasts 40.1 minutes.

9I 84Canyon County · Motorway · 42,997vehicles3,828trucks · 8.9%
Road class
Motorway
Congestion ratio
57.4%
Median trip time
37.0 min
Drivers’ median age
44.2 yrs
Drivers’ average income
$74,584

At 7.5 times the state average, I 84 draws drivers from neighborhoods averaging $74,584 in household income.

10Highway 44Ada County · Primary road · 42,156vehicles1,747trucks · 4.1%
Road class
Primary road
Congestion ratio
58.3%
Median trip time
34.6 min
Drivers’ median age
45.8 yrs
Drivers’ average income
$99,958

A main artery: Highway 44's busiest stretch carries 7.4 times the state average; trucks are 4.1% of it, below the state-wide 9.7%.

Ranked by trucks per day

Only named roads are listed. Some unnamed segments, such as ramps or unlabeled carriageways, may carry as much traffic as the roads shown.

Cars and light vehiclesTrucks
1Vietnam Veterans Memorial HighwayAda County · Motorway · #1 by traffic69,114vehicles8,241trucks · 11.9%
2Vietnam Veterans Memorial HighwayCanyon County · Motorway · #2 by traffic65,112vehicles5,498trucks · 8.4%
3Vietnam Veterans Memorial HighwayElmore County · Motorway · 22,424vehicles5,264trucks · 23.5%
Road class
Motorway
Median trip time
59.5 min
Drivers’ median age
44.6 yrs
Drivers’ average income
$75,734

Vietnam Veterans Memorial Highway leans on freight: 5,264 trucks a day, 23.5% of its traffic against 9.7% state-wide.

4I 84Ada County · Motorway · #3 by traffic64,910vehicles5,182trucks · 8.0%
5Vietnam Veterans Memorial HighwayGooding County · Motorway · 22,424vehicles4,868trucks · 21.7%
Road class
Motorway
Median trip time
47.6 min
Drivers’ median age
45.2 yrs
Drivers’ average income
$73,310

Vietnam Veterans Memorial Highway peaks at 22,424 vehicles a day, 3.9 times the state average; trucks are 21.7% of it, above the state-wide 9.7%.

6Vietnam Veterans Memorial HighwayPayette County · Motorway · 26,024vehicles4,634trucks · 17.8%
Road class
Motorway
Congestion ratio
17.2%
Median trip time
44.2 min
Drivers’ median age
44.9 yrs
Drivers’ average income
$71,840

Vietnam Veterans Memorial Highway carries 4.5 times the state average at its busiest, 4,634 of them trucks (17.8%, above the state-wide 9.7%).

7Vietnam Veterans Memorial HighwayCassia County · Motorway · 13,418vehicles4,548trucks · 33.9%
Road class
Motorway
Congestion ratio
12.0%
Median trip time
62.2 min
Drivers’ median age
43.2 yrs
Drivers’ average income
$78,230

Vietnam Veterans Memorial Highway carries through traffic: the median trip using it lasts 62.2 minutes, against 33.8 for the state.

8Vietnam Veterans Memorial HighwayJerome County · Motorway · 23,097vehicles4,522trucks · 19.6%
Road class
Motorway
Congestion ratio
19.9%
Median trip time
42.7 min
Drivers’ median age
44.4 yrs
Drivers’ average income
$74,210

Vietnam Veterans Memorial Highway carries 4.0 times the state average on its busiest stretch, where the median trip lasts 42.7 minutes.

9Vietnam Veterans Memorial HighwayMinidoka County · Motorway · 16,679vehicles3,986trucks · 23.9%
Road class
Motorway
Median trip time
52.4 min
Drivers’ median age
44.3 yrs
Drivers’ average income
$75,967

A freight route: trucks are 23.9% of the traffic on Vietnam Veterans Memorial Highway's busiest stretch, 2.5 times the state-wide 9.7%.

10Vietnam Veterans Memorial HighwayOneida County · Motorway · 10,076vehicles3,884trucks · 38.5%
Road class
Motorway
Median trip time
73.9 min
Drivers’ median age
42.4 yrs
Drivers’ average income
$80,501

Vietnam Veterans Memorial Highway is busy by local standards, at 76% more than the state average on its busiest stretch; trucks are 38.5% of it, above the state-wide 9.7%.

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

IdahoDepartment 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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States near Idaho

The same traffic breakdown for the states closest to Idaho.

Need segment-level traffic data?

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

Counties in Idaho

Traffic counts, truck share, congestion and driver demographics for each of the 44 counties TrafficZoom measures in Idaho.