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Traffic heat map of Twin Falls County, Idaho: 410 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Blue Lakes Boulevard

Twin Falls County, Idaho Traffic Counts

Its busiest road, Blue Lakes Boulevard, carries 48,215 vehicles a day, 8.4 times the average road. This page breaks down traffic in Twin Falls County, Idaho across 410 miles of monitored roads split into 6,517 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 icon

Total Traffic Volume & Performance in Twin Falls County, Idaho

Traffic

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

vehicles per day5,757
Trucks

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

6.2%
Average travel time

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

35.8 min
Congestion ratio

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

16.7%
Drivers’ average age

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

44.3 yrs
Drivers’ average income

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

$70,915

The average monitored road in Twin Falls County, Idaho carries 5,757 vehicles per day. Across its 410 miles of monitored roads, that adds up to 1,688,761 vehicle-miles traveled per day (≈616 million per year). Trucks are a smaller part of the mix than across Idaho: 6.2% against 9.7%.

Busier roads than 86% of counties in Idaho

At 5,757 vehicles per day, the average road in Twin Falls tracks closely with the state average of 5,734 vehicles per day. In total volume terms, its road network carries about 3.7% of Idaho's statewide total of vehicle-miles. By volume, Twin Falls's 5,757 vehicles per day outpaces 86% of counties in Idaho.

The average trip takes 35.8 minutes, 6% higher than the state level. On travel time, Twin Falls runs longer than 74% of counties in Idaho.

Congestion here (16.7%) closely tracks the state level.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Twin Falls County, Idaho

Trafficvehicles per day8,138
Trucks10.6%
Average travel time35.9 min
Drivers’ average age44.5 yrs
Drivers’ average income$73,772

At 20% of vehicle-miles, highways carry a smaller share of the traffic in Twin Falls County, Idaho than local roads. The average highway carries 8,138 vehicles per day, 44% more than the average non-highway road in the same area, which carries 5,647 vehicles per day.

With 13% of the road miles (52 miles in 287 segments), highways punch above their length, carrying 342,173 vehicle-miles traveled per day (≈125 million per year).

Passenger-oriented highways

Highway truck concentration here runs 25% lower than the state average, at 10.6%. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.

53% of counties in Idaho see a higher highway truck share than Twin Falls's 10.6%. By raw truck volume, Twin Falls carries more highway trucks than 50% of counties in Idaho.

non-highway traffic icon

Non-highway Traffic in Twin Falls County, Idaho

Trafficvehicles per day5,647
Trucks5.1%
Average travel time35.7 min
Congestion ratio16.7%
Drivers’ average age44.3 yrs
Drivers’ average income$70,492

Most travel in Twin Falls County, Idaho happens on local roads, 80% of all vehicle-miles. On the average non-highway road, that comes to 5,647 vehicles per day.

Local roads also make up about 87% of the monitored road miles: 358 miles in 6,230 segments, together carrying 1,346,589 vehicle-miles traveled per day (≈492 million per year). The truck share on non-highway roads is 5.1%.

Local roads carry 52% fewer trucks by share than highways

The concentration of trucks on non-highway roads is 52% lower than on highways.

The non-highway congestion ratio of 16.7% is in line with the state level.

51% of counties in Idaho see lower average driver income among trip origins than Twin Falls. 60% of counties in Idaho have an older driver population than Twin Falls.

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 78% higher than the daily average.
Weekend traffic:
Weekends are much quieter: volumes run about 22% 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 +10% versus the annual average.
Lowest month:
January is the quietest month, with volumes -15% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Twin Falls 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.

Twin Falls County vs. Idaho Traffic Comparison

Of the four measures, truck share differs most: Twin Falls County runs 35% below the Idaho average. Its highway truck share is also 25% below.

MetricTwin Falls CountyIdaho averageDifference
Traffic5,7575,734+0.4%
Truck % (Total Traffic)6.2%9.7%-35.4%
Truck % (Highway)10.6%14.1%-24.6%
Avg. Travel Time35.8 min33.8 min+5.7%

How Twin Falls County compares

Twin Falls County is more congested than any nearby county

Set against the average of the 4 areas nearest to it, Twin Falls County carries 99.7% more traffic on a typical road and runs 10.7 percentage points less truck traffic; it has the busiest roads of the five. The extra traffic here is local and light - trucks make up less of it than anywhere immediately around it.

Twin Falls 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
Twin Falls County5,7576.2%1,688,76135.8 min16.7%
Jerome County, Idaho3,13415.4%1,492,33735.2 min9.2%
Gooding County, Idaho2,06118.6%958,69534.2 min4.2%
Lincoln County, Idaho2,1009.8%256,86351.3 minN/A
Cassia County, Idaho4,23824.1%1,392,07235.2 min3.0%
Idaho average5,7349.7%N/A33.8 min16.0%

Twin Falls County ranked within Idaho

Average daily traffic volume places Twin Falls County #7 of 44 in Idaho - the top quarter of the state.

Twin Falls County ranked among 44 county-level areas in Idaho (1 = highest); measures without data in every county rank a smaller field, down to 35.
MeasureTwin Falls CountyIdaho rank
Traffic volume (AADT)5,757#7 of 44
Highway vehicle-miles per day342,173#20 of 35
Truck share on highways10.6%#19 of 35
Highway trucks per day864#18 of 35
Average travel time35.8 min#12 of 44
Average driver income$70,915#22 of 44
Average driver age44.3 yrs#27 of 44

Busiest roads in Twin Falls County, Idaho

On their busiest stretches, the three busiest roads in Twin Falls County carry 38,339 vehicles a day on average, 6.7 times the typical road in the county (5,757).

Blue Lakes Boulevard leads with 48,215 vehicles a day, 1,389 of them trucks (2.9%). 3000 East Road carries the most trucks, 1,671 a day (4.8% of its traffic), although it ranks #2 for all traffic.

Blue Lakes Boulevard is busy with cars rather than freight: only 2.9% of its traffic is trucks, against 6.2% county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Blue Lakes BoulevardPrimary 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

Blue Lakes Boulevard is one of the more congested roads here: trips take 78% longer than at free-flow speed, against 17% county-wide.

23000 East RoadTrunk road · 34,730vehicles1,671trucks · 4.8%
Road class
Trunk road
Median trip time
30.4 min
Drivers’ median age
44.4 yrs
Drivers’ average income
$73,936

3000 East Road is a trunk route for the county, carrying 6.0 times the county average on its busiest stretch; trucks are 4.8% of it, below the county-wide 6.2%.

3Washington StreetPrimary road · 32,070vehicles1,034trucks · 3.2%
Road class
Primary road
Congestion ratio
69.9%
Median trip time
35.7 min
Drivers’ median age
43.9 yrs
Drivers’ average income
$65,286

Delays build on Washington Street: its congestion ratio of 70% over free-flow time is well above the county's 17%.

4Shoshone StreetSecondary road · 29,818vehicles965trucks · 3.2%
Road class
Secondary road
Congestion ratio
61.7%
Median trip time
39.7 min
Drivers’ median age
44.3 yrs
Drivers’ average income
$61,900

Shoshone Street carries 5.2 times the county average at its busiest, 965 of them trucks (3.2%, below the county-wide 6.2%).

5Pole Line RoadTrunk road · 26,282vehicles993trucks · 3.8%
Road class
Trunk road
Median trip time
31.4 min
Drivers’ median age
44.4 yrs
Drivers’ average income
$77,182

Pole Line Road carries 4.6 times the county average on its busiest stretch, where the median trip lasts 31.4 minutes.

Ranked by trucks per day

Cars and light vehiclesTrucks
13000 East RoadTrunk road · #2 by traffic34,730vehicles1,671trucks · 4.8%
2Blue Lakes BoulevardPrimary road · #1 by traffic48,215vehicles1,389trucks · 2.9%
3Kimberly RoadPrimary road · 16,284vehicles1,068trucks · 6.6%
Road class
Primary road
Median trip time
38.6 min
Drivers’ median age
44.2 yrs
Drivers’ average income
$73,952

At 2.8 times the county average, Kimberly Road draws drivers from neighborhoods averaging $73,952 in household income.

4Washington StreetPrimary road · #3 by traffic32,070vehicles1,034trucks · 3.2%
5Pole Line RoadTrunk road · #5 by traffic26,282vehicles993trucks · 3.8%
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

Twin FallsDepartment 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 Twin Falls County

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

Need segment-level traffic data?

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