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Gem County, Idaho Traffic Counts

This page delivers traffic analytics for Gem County, Idaho. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Gem County, Idaho among 121 road miles divided in 2,678 segments. Our metrics go beyond simple volume counts to provide actionable insights on traffic intensity, congestion, commercial vehicle flow, and network performance with highest possible granularity (average segment length is 238 ft). Whether you are evaluating a new retail location, planning logistics routes, or assessing infrastructure needs, this data helps you move from assumptions to certainty.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
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Total Traffic Volume & Performance

Traffic

Traffic

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

3,228

Trucks

Trucks

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

5.8%

Average travel time

Average travel time

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

29.7 min

Congestion ratio

Congestion ratio

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

15.7%

Drivers’ average age

Drivers’ average age

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

50.5 yrs

Drivers’ average income

Drivers’ average income

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

$75,418

Our data indicates an estimated average traffic volume of 3,228 vehicles per day in Gem County, Idaho that results in 370,681 vehicle-miles traveled per day (≈135 million per year). The traffic stream is comprised of an average of 1 truck for every 17 vehicles. Typical time spent behind the wheel per trip is 29.7 minutes, which already accounts for delays at signals, intersections, and congestion.

Analytical insight

When compared to the Idaho state averages: Gem's average daily traffic volume is 44% lower than the state average - 3,228 vehicles per day against 5,734 - suggesting less traffic load per road, a critical factor for logistics and site planning. Across the whole network that adds up to 370,681 vehicle-miles traveled per day (≈135 million per year), roughly 0.8% of Idaho's statewide total. The average trip takes 29.7 minutes, 12% lower than the state level. Congestion runs 2% lower than the state level, at a ratio of 15.7% - smoother traffic flow - crucial for traffic control improvement and logistics planning. 58% of counties in Idaho see less traffic than Gem's 3,228 vehicles per day. Its average travel time of 29.7 minutes is longer than 14% of counties in Idaho.

Highway vs. Non-Highway Traffic Analysis

Analytical insight

N/A
non-highway traffic icon

Non-highway traffic

Traffic

Traffic

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

3,228

Trucks

Trucks

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

5.8%

Average travel time

Average travel time

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

29.7 min

Congestion ratio

Congestion ratio

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

15.7%

Drivers’ average age

Drivers’ average age

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

50.5 yrs

Drivers’ average income

Drivers’ average income

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

$75,418

The non-highway road network in Gem County, Idaho supports a substantial volume of traffic. The average non-highway road carries 3,228 vehicles per day. That average covers 121 non-highway road miles divided in 2,678 segments (average segment length 238 ft), together carrying 370,681 vehicle-miles traveled per day (≈135 million per year). Trucks constitute 5.8% of non-highway traffic.

Analytical insight

The non-highway congestion ratio of 15.7% is 4% lower than the state level, suggesting more efficient local mobility than the state average. Gem's overall average travel time exceeds 14% of counties in Idaho. Gem's average driver income exceeds 77% of counties in Idaho. 67% of counties in Idaho have a younger driver population than Gem.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–12:00 PM and PM peak 3:00 PM–6:00 PM, with volumes reaching approximately 86% higher than the daily average.
Weekend traffic:
Weekend volumes run about 7% below weekday levels.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +19% versus the annual average.
Lowest month:
January is the quietest month, with volumes -23% versus the annual average.

Analytical insight

In Gem County, Idaho, the peak hour concentrates about 8% of the day's traffic, and seasonal swing is pronounced at +19% in high season.

Traffic Flow Profile Comparison

Metric

Gem

Idaho
Average

Difference

Traffic

3,228

5,734

-43.7%

Truck % (Total Traffic)

5.8%

9.7%

-40.0%

Truck % (Highway)

14.1%

Avg. Travel Time

29.7 min

33.8 min

-12.3%

How Gem County compares

Gem County against nearby areas

Set against the average of the 4 areas nearest to it, Gem County is 106.0% more congested and sees 23.4% shorter typical trips; it has the fourth busiest roads of the five. Its roads run tighter than the areas around it on the same traffic - what differs here is the capacity, not the demand.

Gem 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
Gem County3,2285.8%370,68129.7 min15.7%
Boise County, Idaho4,8339.4%266,40658.1 min3.8%
Washington County, Idaho1,96410.2%194,39938.5 min7.5%
Payette County, Idaho3,58813.5%781,12135.0 min9.4%
Valley County, Idaho3,7807.5%421,43823.3 min9.7%
Idaho average5,7349.7%N/A33.8 min16.0%

Gem County ranked within Idaho

Average travel time places Gem County #38 of 44 in Idaho - the bottom quarter of the state.

Where Gem County sits among Idaho's county-level areas on each measure. Rank 1 is the highest value in the state, whether or not that is the outcome you want; the field size differs by measure because not every county carries highway data.
MeasureGem CountyIdaho rank
Traffic volume (AADT)3,228#19 of 44
Average travel time29.7 min#38 of 44
Average driver income$75,418#11 of 44
Average driver age50.5 yrs#15 of 44

Gem County ranks #11 of 44 on average driver income but #38 of 44 on average travel time - the two describe the same roads and are worth reading together rather than either on its own.

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

IdahoDepartment of Transportation

Historical traffic pattern databases

U.S. Census Bureau
All metrics represent estimates based on statistical modeling and are intended for strategic planning purposes.
TrafficZoom methodology
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Data current as of:
Q3 2026

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Counties near Gem County

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

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