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TrafficThe average number of vehicles that travel each day over any road in the road network. | vehicles per day5,734 |
|---|---|
TrucksThe percentage of the total traffic volume composed of heavy vehicles. | 9.7% |
Average travel timeThe average time of travel averaged among all vehicles traveling on the road network. | 33.8 min |
Congestion ratioThe rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network. | 16.0% |
Drivers’ average ageAverage age of residents in the geographic areas where the vehicle trips originated. | 44.2 yrs |
Drivers’ average incomeAverage 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.
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.
| Traffic | vehicles per day7,992 |
|---|---|
| Trucks | 14.1% |
| Average travel time | 38.2 min |
| Congestion ratio | 29.0% |
| Drivers’ average age | 46.3 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).
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.
| Traffic | vehicles per day5,519 |
|---|---|
| Trucks | 5.6% |
| Average travel time | 33.5 min |
| Congestion ratio | 16.4% |
| Drivers’ average age | 43.9 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.
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.
The average daily traffic per road sets Idaho apart: 18% below the United States average.
| Metric | Idaho | United States average | Difference |
|---|---|---|---|
| Traffic | 5,734 | 6,986 | -17.9% |
| Truck % (Total Traffic) | 9.7% | 9.3% | +3.3% |
| Truck % (Highway) | 14.1% | 13.1% | +7.7% |
| Avg. Travel Time | 33.8 min | 33.3 min | +1.6% |
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.
| State | Average daily traffic | Truck share | Daily vehicle-miles | Average travel time | Congestion ratio |
|---|---|---|---|---|---|
| Idaho | 5,734 | 9.7% | 45,169,444 | 33.8 min | 16.0% |
| Montana | 4,202 | 11.7% | 28,466,944 | 36.2 min | 12.3% |
| Utah | 10,198 | 8.9% | 87,040,466 | 32.2 min | 21.2% |
| Oregon | 5,908 | 9.2% | 86,863,904 | 34.3 min | 16.6% |
| Washington | 7,322 | 7.1% | 155,256,676 | 33.2 min | 19.9% |
| United States average | 6,986 | 9.3% | N/A | 33.3 min | 18.9% |
Together, those three counties carry 41.1% of all the vehicle-miles measured in the state.
| County | Daily vehicle-miles | Average daily traffic | Truck share | Road miles |
|---|---|---|---|---|
| 1. Ada County | 9,986,228 | 9,292 | 6.3% | 975 |
| 2. Canyon County | 4,736,861 | 6,466 | 7.2% | 746 |
| 3. Kootenai County | 3,854,991 | 5,955 | 6.7% | 735 |
Idaho's three most truck-intensive counties account for 21.8% of the truck vehicle-miles driven in the state.
| County | Truck share | Truck share on highways | Average daily traffic | Daily vehicle-miles |
|---|---|---|---|---|
| 1. Oneida County | 25.2% | 26.0% | 1,316 | 550,519 |
| 2. Cassia County | 24.1% | 30.9% | 4,238 | 1,392,072 |
| 3. Elmore County | 18.7% | 22.3% | 4,558 | 2,556,881 |
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.
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.
Only named roads are listed. Some unnamed segments, such as ramps or unlabeled carriageways, may carry as much traffic as the roads shown.
Vietnam Veterans Memorial Highway carries 12.1 times the state average on its busiest stretch, where the median trip lasts 34.6 minutes.
Delays build on Vietnam Veterans Memorial Highway: its congestion ratio of 65% over free-flow time is well above the state's 16%.
At 11.3 times the state average, I 84 draws drivers from neighborhoods averaging $89,474 in household income.
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%.
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%.
Travel on Blue Lakes Boulevard's busiest stretch runs 78% over free-flow time, against 16% across the state, so expect slower peak hours.
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%).
ID 55 carries 7.6 times the state average on its busiest stretch, where the median trip lasts 40.1 minutes.
At 7.5 times the state average, I 84 draws drivers from neighborhoods averaging $74,584 in household income.
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%.
Only named roads are listed. Some unnamed segments, such as ramps or unlabeled carriageways, may carry as much traffic as the roads shown.
Vietnam Veterans Memorial Highway leans on freight: 5,264 trucks a day, 23.5% of its traffic against 9.7% state-wide.
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%.
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%).
Vietnam Veterans Memorial Highway carries through traffic: the median trip using it lasts 62.2 minutes, against 33.8 for the state.
Vietnam Veterans Memorial Highway carries 4.0 times the state average on its busiest stretch, where the median trip lasts 42.7 minutes.
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%.
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%.
The average monitored road in Idaho carries 5,734 vehicles per day, 18% less than the national average of 6,986.
The driver population in Idaho skews younger than 82% of states nationwide.
Trucks make up about 9.7% of all traffic in Idaho, rising to 14.1% on highways, where long-haul freight concentrates.
Weekday traffic has two busy windows: a long morning plateau from 8:00 AM to 12:00 PM and PM peak 3:00 PM–6:00 PM - about 80% above the daily average.
Traffic in Idaho peaks in June–August, when volumes run 12% above the annual average. January is the quietest month, averaging 4,818 vehicles per day, 16% below the annual average.
Drivers on Idaho roads have a median age of 44 years, and the median household income of the neighborhoods trips originate from averages $77,692, 15% below the national average.
The average trip in Idaho takes 33.8 minutes, about the same as the national average, delays at signals and congestion included.
About 69,114 vehicles per day in both directions on its busiest stretch, including 8,241 trucks (11.9%). Traffic is lower on its quieter stretches; TrafficZoom shows the count for every segment.

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The same traffic breakdown for the states closest to Idaho.
Identify traffic patterns street by street and analyze the exact corridors that matter to your project.
Traffic counts, truck share, congestion and driver demographics for each of the 44 counties TrafficZoom measures in Idaho.