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Traffic heat map of Boise County, Idaho: 81 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Horseshoe Bend Road and Main Street

Boise County, Idaho Traffic Counts

TrafficZoom tracks traffic on 81 road miles in Boise County, Idaho, divided into 465 segments averaging 916 ft. Trips here are among the 3 longest of any county in Idaho. 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 Boise County, Idaho

Traffic

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

vehicles per day4,833
Trucks

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

9.4%
Average travel time

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

58.1 min
Congestion ratio

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

3.8%
Drivers’ average age

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

54.4 yrs
Drivers’ average income

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

$83,615

A typical monitored road in Boise County, Idaho sees 4,833 vehicles per day, while its 81 miles of monitored roads together handle 266,406 vehicle-miles traveled per day (≈97.2 million per year). About 1 in 11 vehicles is a truck, in line with Idaho (9.7%).

Longer trips than 98% of counties in Idaho

Boise sees 16% lower average daily traffic volume than the state average (4,833 vehicles per day against 5,734), suggesting less demand on each road - a critical factor for logistics and site planning. Across the whole network, that travel is about 0.6% of Idaho's statewide total. By volume, Boise's 4,833 vehicles per day outpaces 84% of counties in Idaho.

At 58.1 minutes, the average travel time is 72% higher than the state level. On travel time, Boise runs longer than 98% of counties in Idaho.

The congestion ratio of 3.8% is 76% lower, pointing to smoother traffic flow than the state level - free-flowing roads make scheduled deliveries highly predictable.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Boise County, Idaho

Trafficvehicles per day11,106
Trucks9.7%
Average travel time60.4 min
Drivers’ average age54.4 yrs
Drivers’ average income$83,242

Highways carry the vast majority of travel in Boise County, Idaho, 87% of all vehicle-miles. The average highway carries 11,106 vehicles per day, 997% more than the average non-highway road in the same area, which carries 1,013 vehicles per day.

Highways make up 51% of the monitored road miles (41 miles, 176 segments), so they carry more than their share: 232,604 vehicle-miles traveled per day (≈84.9 million per year).

Lower highway truck share than 71% of counties in Idaho

Highway truck concentration here runs 31% lower than the state average, at 9.7%. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.

71% of counties in Idaho see a higher highway truck share than Boise's 9.7%. By raw truck volume, Boise carries fewer highway trucks than 56% of counties in Idaho.

non-highway traffic icon

Non-highway Traffic in Boise County, Idaho

Trafficvehicles per day1,013
Trucks7.7%
Average travel time56.8 min
Congestion ratio3.8%
Drivers’ average age55.1 yrs
Drivers’ average income$85,730

Local roads carry only a small share of the traffic in Boise County, Idaho, 13% of all vehicle-miles. On the average non-highway road, that comes to 1,013 vehicles per day.

Spread over 40 miles and 289 segments, 49% of the road network, local roads carry a lighter load per mile: 33,802 vehicle-miles traveled per day (≈12.3 million per year). Trucks make up 7.7% of non-highway traffic, about 1 in 13 vehicles.

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

Compared to highways, non-highway routes see 21% fewer trucks by share.

Non-highway congestion (3.8%) runs 77% lower than the state average, pointing to smoother local traffic flow.

Trip origins here have higher average income than 93% of counties in Idaho. 84% of counties in Idaho have a younger driver population than Boise.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 9:00 AM–12:00 PM and a long afternoon plateau from 2:00 PM to 6:00 PM, with volumes reaching approximately 119% higher than the daily average.
Weekend traffic:
Weekends are busier than weekdays: volumes run about 19% above weekday levels, which usually points to leisure, tourism or shopping traffic.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +60% versus the annual average.
Lowest month:
March is the quietest month, with volumes -41% versus the annual average.

Data Finding: Hourly & Seasonal Patterns

In Boise County, Idaho, traffic has a sharp commute peak, with the busiest hour carrying about 9% of the day's traffic, and there is a strong seasonal swing of +60% in high season.

Boise County vs. Idaho Traffic Comparison

The average travel time sets Boise County apart: 72% above the Idaho average. Its highway truck share, by contrast, is 31% below.

MetricBoise CountyIdaho averageDifference
Traffic4,8335,734-15.7%
Truck % (Total Traffic)9.4%9.7%-2.5%
Truck % (Highway)9.7%14.1%-31.2%
Avg. Travel Time58.1 min33.8 min+71.9%

How Boise County compares

Trips in Boise County run longer than in any nearby county

Compared with its 4 closest neighbours, Boise County moves 8.0% of the total daily travel and is 70.1% less congested; it has the second busiest roads of the five. Trips here run longer without running slower: distance, not congestion, is what drivers spend their time on.

Boise 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
Boise County4,8339.4%266,40658.1 min3.8%
Gem County, Idaho3,2285.8%370,68129.7 min15.7%
Elmore County, Idaho4,55818.7%2,556,88130.2 min3.6%
Ada County, Idaho9,2926.3%9,986,22832.6 min22.5%
Valley County, Idaho3,7807.5%421,43823.3 min9.7%
Idaho average5,7349.7%N/A33.8 min16.0%

Boise County ranked within Idaho

On average travel time, Boise County is among the three highest county-level areas in Idaho.

Boise County ranked among 44 county-level areas in Idaho (1 = highest); measures without data in every county rank a smaller field, down to 35.
MeasureBoise CountyIdaho rank
Traffic volume (AADT)4,833#8 of 44
Highway vehicle-miles per day232,604#24 of 35
Truck share on highways9.7%#25 of 35
Highway trucks per day1,075#20 of 35
Average travel time58.1 min#2 of 44
Average driver income$83,615#4 of 44
Average driver age54.4 yrs#8 of 44

Busiest roads in Boise County, Idaho

The three busiest roads in Boise County average 15,169 vehicles a day, 3.1 times the county average of 4,833 across all its monitored roads.

Horseshoe Bend Road leads with 15,471 vehicles a day, 1,362 of them trucks (8.8%). Main Street is practically level with it at 15,192. It also carries the most trucks.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Horseshoe Bend RoadTrunk road · 15,471vehicles1,362trucks · 8.8%
Road class
Trunk road
Median trip time
58.8 min
Drivers’ median age
54.9 yrs
Drivers’ average income
$79,226

The busiest stretch of Horseshoe Bend Road carries 3.2 times the county average; trucks are 8.8% of it, below the county-wide 9.4%.

2Main StreetTrunk road · 15,192vehicles1,197trucks · 7.9%
Road class
Trunk road
Median trip time
58.4 min
Drivers’ median age
53.2 yrs
Drivers’ average income
$82,832

On its busiest stretch, Main Street carries 3.1 times the county average; trucks are 7.9% of it, below the county-wide 9.4%.

3Summit Ridge RoadTrunk road · 14,843vehicles1,242trucks · 8.4%
Road class
Trunk road
Median trip time
58.1 min
Drivers’ median age
53.5 yrs
Drivers’ average income
$83,293

Summit Ridge Road peaks at 14,843 vehicles a day, 3.1 times the county average; trucks are 8.4% of it, below the county-wide 9.4%.

4ID 55Trunk road · 13,474vehicles1,106trucks · 8.2%
Road class
Trunk road
Median trip time
62.6 min
Drivers’ median age
56.5 yrs
Drivers’ average income
$82,019

ID 55 carries 2.8 times the county average at its busiest, 1,106 of them trucks (8.2%, below the county-wide 9.4%).

5Payette River Scenic BywayTrunk road · 12,744vehicles1,203trucks · 9.4%
Road class
Trunk road
Median trip time
52.1 min
Drivers’ median age
52.3 yrs
Drivers’ average income
$89,226

Payette River Scenic Byway carries 2.6 times the county average on its busiest stretch, where the median trip lasts 52.1 minutes.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Horseshoe Bend RoadTrunk road · #1 by traffic15,471vehicles1,362trucks · 8.8%
2Summit Ridge RoadTrunk road · #3 by traffic14,843vehicles1,242trucks · 8.4%
3Payette River Scenic BywayTrunk road · #5 by traffic12,744vehicles1,203trucks · 9.4%
4Main StreetTrunk road · #2 by traffic15,192vehicles1,197trucks · 7.9%
5ID 55Trunk road · #4 by traffic13,474vehicles1,106trucks · 8.2%
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

BoiseDepartment 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 Boise County

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

Need segment-level traffic data?

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