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Traffic heat map of Fremont County, Idaho: 196 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Yellowstone Highway and Bridge Street

Fremont County, Idaho Traffic Counts

Traffic analytics for Fremont County, Idaho, calculated from real-world mobile and sensor networks on 1,400 road segments (196 road miles, about 738 ft each). Its busiest road, Yellowstone Highway, carries 24,226 vehicles a day, 8.1 times the average road. Use the figures below to move from assumptions to certainty on retail locations, logistics and road planning.
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 Fremont County, Idaho

Traffic

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

vehicles per day2,976
Trucks

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

8.2%
Average travel time

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

37.9 min
Drivers’ average age

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

40.5 yrs
Drivers’ average income

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

$74,502

Our data shows 2,976 vehicles per day on the average road in Fremont County, Idaho, and 620,280 vehicle-miles traveled per day (≈226 million per year) across its 196 miles of monitored roads. Trucks are 8.2% of traffic, close to the 9.7% across Idaho.

Longer trips than 77% of counties in Idaho

At 2,976 vehicles per day, the average monitored road in Fremont carries 48% less traffic than the state average of 5,734, suggesting less demand on each road - less drive-by exposure for retail, but easier access for deliveries. Across the whole network, that travel is about 1.4% of Idaho's statewide total. By volume, Fremont's 2,976 vehicles per day outpaces 51% of counties in Idaho.

The average trip takes 37.9 minutes, 12% higher than the state level. Its average travel time of 37.9 minutes is longer than 77% of counties in Idaho.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Fremont County, Idaho

Trafficvehicles per day6,354
Trucks8.5%
Average travel time40.8 min
Drivers’ average age40.8 yrs
Drivers’ average income$74,368

The vast majority of driving in Fremont County, Idaho happens on highways: 81% of all vehicle-miles. The average highway carries 6,354 vehicles per day, 265% more than the average non-highway road in the same area, which carries 1,740 vehicles per day.

With 42% of the road miles (83 miles in 375 segments), highways punch above their length, carrying 505,390 vehicle-miles traveled per day (≈184 million per year).

By highway travel volume, Fremont outranks 65% of counties in Idaho.

Lower highway truck share than 91% of counties in Idaho

The concentration of trucks on highways (8.5%) is 40% lower than the state average for similar road classifications. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.

Fremont's highway truck share (8.5%) is lower than 91% of counties in Idaho. 59% of counties in Idaho see more highway trucks per day than Fremont's roughly 539.

non-highway traffic icon

Non-highway Traffic in Fremont County, Idaho

Trafficvehicles per day1,740
Trucks7.2%
Average travel time36.8 min
Drivers’ average age39.6 yrs
Drivers’ average income$74,911

Local roads carry a smaller share of travel in Fremont County, Idaho, 19% of vehicle-miles; most driving happens on highways. A typical local road sees 1,740 vehicles per day.

Spread over 113 miles and 1,025 segments, 58% of the road network, local roads carry a lighter load per mile: 114,890 vehicle-miles traveled per day (≈41.9 million per year). Trucks make up 7.2% of non-highway traffic, about 1 in 14 vehicles.

Younger drivers than 91% of counties in Idaho

Non-highway roads carry a truck concentration that's 15% lower than the highway network.

Fremont's average driver income is higher than 74% of counties in Idaho. The driver population here skews younger than 91% of counties in Idaho.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 9:00 AM–12:00 PM and PM peak 5:00 PM–6:00 PM, with volumes reaching approximately 85% higher than the daily average.
Weekend traffic:
Weekends are busier than weekdays: volumes run about 9% 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 +68% versus the annual average.
Lowest month:
February is the quietest month, with volumes -53% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Fremont County, Idaho, the peak hour concentrates about 8% of the day's traffic, and there is a strong seasonal swing of +68% in high season.

Fremont County vs. Idaho Traffic Comparison

The average daily traffic per road sets Fremont County apart: 48% below the Idaho average. Its highway truck share is also 40% below.

MetricFremont CountyIdaho averageDifference
Traffic2,9765,734-48.1%
Truck % (Total Traffic)8.2%9.7%-14.7%
Truck % (Highway)8.5%14.1%-39.8%
Avg. Travel Time37.9 min33.8 min+11.9%

How Fremont County compares

Fremont County against nearby counties

Nothing in this table sets Fremont County sharply apart from the 4 areas nearest to it, though it has the fourth busiest roads of the five.

Fremont 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
Fremont County2,9768.2%620,28037.9 minN/A
Madison County, Idaho4,3526.9%822,40333.5 min7.1%
Teton County, Idaho6,2517.5%284,68140.5 min26.3%
Clark County, Idaho40517.0%153,82572.5 minN/A
Teton County, Wyoming5,2997.0%990,56830.8 min8.3%
Idaho average5,7349.7%N/A33.8 min16.0%

Fremont County ranked within Idaho

Fremont County sits in the bottom quarter of the Idaho field on truck share on highways, at #32 of 35.

Fremont County ranked among 44 county-level areas in Idaho (1 = highest); measures without data in every county rank a smaller field, down to 35.
MeasureFremont CountyIdaho rank
Traffic volume (AADT)2,976#22 of 44
Highway vehicle-miles per day505,390#13 of 35
Truck share on highways8.5%#32 of 35
Highway trucks per day539#21 of 35
Average travel time37.9 min#11 of 44
Average driver income$74,502#12 of 44
Average driver age40.5 yrs#40 of 44

The two ends of this table sit far apart: #11 of 44 on average travel time, against #32 of 35 on truck share on highways.

Busiest roads in Fremont County, Idaho

On their busiest stretches, the three busiest roads in Fremont County carry 13,907 vehicles a day on average, 4.7 times the typical road in the county (2,976).

Yellowstone Highway is the busiest road, at 24,226 vehicles a day, 1,785 of them trucks (7.4%). No other road comes close: Bridge Street, in second place, carries 10,973. It tops the truck ranking too, with the most trucks.

Main Street skews older: its drivers' median age is 52.8, compared with 40.5 county-wide.

South 3rd East carries longer journeys than most roads here, with a median trip of 54.5 minutes against 37.9 county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Yellowstone HighwayTrunk road · 24,226vehicles1,785trucks · 7.4%
Road class
Trunk road
Median trip time
33.2 min
Drivers’ median age
32.4 yrs
Drivers’ average income
$70,578

Yellowstone Highway carries 8.1 times the county average at its busiest, 1,785 of them trucks (7.4%, below the county-wide 8.2%).

2Bridge StreetPrimary road · 10,973vehicles565trucks · 5.2%
Road class
Primary road
Median trip time
34.0 min
Drivers’ median age
35.1 yrs
Drivers’ average income
$72,043

Bridge Street carries 3.7 times the county average on its busiest stretch, where the median trip lasts 34.0 minutes.

3US 20Trunk road · 6,521vehicles569trucks · 8.7%
Road class
Trunk road
Median trip time
42.9 min
Drivers’ median age
43.2 yrs
Drivers’ average income
$75,710

At 2.2 times the county average, US 20 draws drivers from neighborhoods averaging $75,710 in household income.

4South 3rd EastTertiary road · 4,223vehicles142trucks · 3.4%
Road class
Tertiary road
Median trip time
54.5 min
Drivers’ median age
42.5 yrs
Drivers’ average income
$76,810

South 3rd East carries 42% more than the county average at its busiest, 142 of them trucks (3.4%, below the county-wide 8.2%).

5Main StreetSecondary road · 3,546vehicles220trucks · 6.2%
Road class
Secondary road
Median trip time
47.2 min
Drivers’ median age
52.8 yrs
Drivers’ average income
$66,828

Main Street carries 19% more than the county average on its busiest stretch, where the median trip lasts 47.2 minutes.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Yellowstone HighwayTrunk road · #1 by traffic24,226vehicles1,785trucks · 7.4%
2US 20Trunk road · #3 by traffic6,521vehicles569trucks · 8.7%
3Bridge StreetPrimary road · #2 by traffic10,973vehicles565trucks · 5.2%
4Main StreetSecondary road · #5 by traffic3,546vehicles220trucks · 6.2%
5Parker Main StreetTertiary road · 2,063vehicles198trucks · 9.6%
Road class
Tertiary road
Median trip time
28.9 min
Drivers’ median age
47.9 yrs
Drivers’ average income
$75,697

Even at its busiest, Parker Main Street carries 31% less than the county average; trucks are 9.6% of it, above the county-wide 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

FremontDepartment 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 Fremont County

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

Need segment-level traffic data?

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