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Traffic heat map of Franklin County, Idaho: 104 miles of roads shaded from blue (light) to red (heavy traffic), busiest on State Street and US 91

Franklin County, Idaho Traffic Counts

Its busiest road, State Street, carries 13,430 vehicles a day, 4.6 times the average road. This page breaks down traffic in Franklin County, Idaho across 104 miles of monitored roads split into 1,452 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 Franklin County, Idaho

Traffic

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

vehicles per day2,949
Trucks

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

7.2%
Average travel time

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

32.2 min
Congestion ratio

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

2.8%
Drivers’ average age

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

38.2 yrs
Drivers’ average income

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

$70,689

Our data shows 2,949 vehicles per day on the average road in Franklin County, Idaho, and 233,267 vehicle-miles traveled per day (≈85.1 million per year) across its 104 miles of monitored roads. Trucks are a smaller part of the mix than across Idaho: 7.2% against 9.7%.

Congestion 83% below the Idaho average

At 2,949 vehicles per day, the average monitored road in Franklin carries 49% less traffic than the state average of 5,734, suggesting less demand on each road - lighter roads for freight, but less passing trade for roadside retail. Network-wide, Franklin accounts for about 0.5% of Idaho's statewide total of vehicle-miles. By volume, Franklin's 2,949 vehicles per day trails 51% of counties in Idaho.

Journey times here (32.2 minutes on average) closely track the state level. Its average travel time of 32.2 minutes is shorter than 60% of counties in Idaho.

At 83% lower than the state level, the 2.8% congestion ratio signals smoother traffic flow - delays are rare enough to plan travel times almost to the minute.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 9:00 AM–12:00 PM and PM peak 3:00 PM–6:00 PM, with volumes reaching approximately 80% higher than the daily average.
Weekend traffic:
Weekend traffic is about as busy as on weekdays (-4%): leisure and through trips largely replace the commute.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +16% versus the annual average.
Lowest month:
January is the quietest month, with volumes -19% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Franklin County, Idaho, the peak hour concentrates about 7% of the day's traffic, and there is a strong seasonal swing of +16% in high season.

Franklin County vs. Idaho Traffic Comparison

Of the four measures, average daily traffic per road differs most: Franklin County runs 49% below the Idaho average. Its truck share is also 26% below.

MetricFranklin CountyIdaho averageDifference
Traffic2,9495,734-48.6%
Truck % (Total Traffic)7.2%9.7%-25.6%
Avg. Travel Time32.2 min33.8 min-4.8%

How Franklin County compares

Franklin County has the lowest truck share of its nearby counties

Set against the average of the 4 areas nearest to it, Franklin County moves 33.1% of the total daily travel and runs 7.2 percentage points less truck traffic; it has the second busiest roads of the five.

Franklin 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
Franklin County2,9497.2%233,26732.2 min2.8%
Bear Lake County, Idaho2,16810.2%191,25529.8 minN/A
Bannock County, Idaho4,35610.1%1,864,63435.0 min16.8%
Oneida County, Idaho1,31625.2%550,51939.4 min11.4%
Caribou County, Idaho2,03512.1%212,14333.2 minN/A
Idaho average5,7349.7%N/A33.8 min16.0%

Franklin County ranked within Idaho

Franklin County sits in the bottom quarter of the Idaho field on average driver age, at #41 of 44.

Franklin County ranked among 44 county-level areas in Idaho (1 = highest).
MeasureFranklin CountyIdaho rank
Traffic volume (AADT)2,949#23 of 44
Average travel time32.2 min#27 of 44
Average driver income$70,689#23 of 44
Average driver age38.2 yrs#41 of 44

Busiest roads in Franklin County, Idaho

Traffic concentrates on a few corridors: the three busiest roads average 10,294 vehicles a day, against 2,949 on the average road in Franklin County.

State Street is the busiest road, at 13,430 vehicles a day, 828 of them trucks (6.2%). It also carries the most trucks.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1State StreetPrimary road · 13,430vehicles828trucks · 6.2%
Road class
Primary road
Median trip time
31.9 min
Drivers’ median age
37.1 yrs
Drivers’ average income
$66,769

On its busiest stretch, State Street carries 4.6 times the county average; trucks are 6.2% of it, below the county-wide 7.2%.

2US 91Primary road · 10,130vehicles664trucks · 6.5%
Road class
Primary road
Median trip time
32.0 min
Drivers’ median age
37.2 yrs
Drivers’ average income
$69,974

US 91 peaks at 10,130 vehicles a day, 3.4 times the county average; trucks are 6.5% of it, below the county-wide 7.2%.

3East 800 NorthPrimary road · 7,322vehicles412trucks · 5.6%
Road class
Primary road
Median trip time
30.9 min
Drivers’ median age
39.7 yrs
Drivers’ average income
$71,366

East 800 North carries 2.5 times the county average at its busiest, 412 of them trucks (5.6%, below the county-wide 7.2%).

4Oneida StreetSecondary road · 4,594vehicles313trucks · 6.8%
Road class
Secondary road
Median trip time
28.3 min
Drivers’ median age
40.6 yrs
Drivers’ average income
$64,908

At 56% more than the county average, Oneida Street draws drivers from neighborhoods averaging $64,908 in household income.

5West 800 NorthPrimary road · 4,454vehicles282trucks · 6.3%
Road class
Primary road
Median trip time
37.3 min
Drivers’ median age
41.5 yrs
Drivers’ average income
$60,058

West 800 North is busy by local standards, at 51% more than the county average on its busiest stretch; trucks are 6.3% of it, below the county-wide 7.2%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1State StreetPrimary road · #1 by traffic13,430vehicles828trucks · 6.2%
2US 91Primary road · #2 by traffic10,130vehicles664trucks · 6.5%
3East 800 NorthPrimary road · #3 by traffic7,322vehicles412trucks · 5.6%
4Oneida StreetSecondary road · #4 by traffic4,594vehicles313trucks · 6.8%
5West 800 NorthPrimary road · #5 by traffic4,454vehicles282trucks · 6.3%
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

FranklinDepartment 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 Franklin County

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

Need segment-level traffic data?

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