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Union County, Iowa Traffic Counts

This page delivers traffic analytics for Union County, Iowa. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Union County, Iowa among 148 road miles divided in 1,981 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 396 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.

2,528

Trucks

Trucks

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

7.6%

Average travel time

Average travel time

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

31.5 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.

4.8%

Drivers’ average age

Drivers’ average age

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

50.1 yrs

Drivers’ average income

Drivers’ average income

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

$66,022

Our data indicates an estimated average traffic volume of 2,528 vehicles per day in Union County, Iowa that results in 249,515 vehicle-miles traveled per day (≈91.1 million per year). The traffic stream is comprised of an average of 1 truck for every 13 vehicles. Typical time spent behind the wheel per trip is 31.5 minutes, which already accounts for delays at signals, intersections, and congestion.

Analytical insight

When compared to the Iowa state averages: Union's average daily traffic volume is 17% lower than the state average - 2,528 vehicles per day against 3,042 - suggesting less traffic load per road, a critical factor for logistics and site planning. Across the whole network that adds up to 249,515 vehicle-miles traveled per day (≈91.1 million per year), roughly 0.3% of Iowa's statewide total. Journey times run 5% lower than the state level, at 31.5 minutes on average. Congestion runs 58% lower than the state level, at a ratio of 4.8% - smoother traffic flow - crucial for traffic control improvement and logistics planning. Union carries more traffic than 82% of counties in Iowa. Its average travel time of 31.5 minutes is longer than 21% of counties in Iowa.

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.

2,528

Trucks

Trucks

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

7.6%

Average travel time

Average travel time

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

31.5 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.

4.8%

Drivers’ average age

Drivers’ average age

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

50.1 yrs

Drivers’ average income

Drivers’ average income

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

$66,022

The non-highway road network in Union County, Iowa supports a substantial volume of traffic. The average non-highway road carries 2,528 vehicles per day. That average covers 148 non-highway road miles divided in 1,981 segments (average segment length 396 ft), together carrying 249,515 vehicle-miles traveled per day (≈91.1 million per year). Trucks constitute 7.6% of non-highway traffic.

Analytical insight

At 57% lower than the state level, the non-highway congestion ratio of 4.8% signals easier movement on local roads. Union's overall average travel time exceeds 21% of counties in Iowa. 14% of counties in Iowa see lower average driver income among trip origins than Union. The driver population here skews older than 47% of counties in Iowa.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–9:00 AM and PM peak 3:00 PM–7:00 PM, with volumes reaching approximately 69% higher than the daily average.
Weekend traffic:
Weekend volumes run about 6% below weekday levels.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
May–July is the high season, with volumes +24% versus the annual average.
Lowest month:
February is the quietest month, with volumes -21% versus the annual average.

Analytical insight

In Union County, Iowa, the peak hour concentrates about 7% of the day's traffic, and seasonal swing is pronounced at +24% in high season.

Traffic Flow Profile Comparison

Metric

Union

Iowa
Average

Difference

Traffic

2,528

3,042

-16.9%

Truck % (Total Traffic)

7.6%

11.0%

-30.8%

Truck % (Highway)

16.1%

Avg. Travel Time

31.5 min

33.0 min

-4.7%

How Union County compares

Union County against nearby areas

Compared with its 4 closest neighbours, Union County runs 8.4 percentage points less truck traffic and carries 59.9% more traffic on a typical road; it has the second busiest roads of the five. The extra traffic here is local and light - trucks make up less of it than anywhere immediately around it.

Union County and the 4 nearest county-level areas by centroid distance, with the Iowa average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Union County2,5287.6%249,51531.5 min4.8%
Ringgold County, Iowa94310.0%93,70728.9 minN/A
Adams County, Iowa9829.5%108,62938.9 minN/A
Clarke County, Iowa2,58719.7%494,89232.6 min4.0%
Adair County, Iowa1,81024.8%694,62035.6 minN/A
Iowa average3,04211.0%N/A33.0 min11.4%

Union County ranked within Iowa

Union County sits in the bottom quarter of the Iowa field on average driver income, at #85 of 99.

Where Union County sits among Iowa'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.
MeasureUnion CountyIowa rank
Traffic volume (AADT)2,528#19 of 99
Average travel time31.5 min#78 of 99
Average driver income$66,022#85 of 99
Average driver age50.1 yrs#53 of 99

Union County ranks #19 of 99 on average daily traffic volume but #85 of 99 on average driver income - 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

IowaDepartment 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 Union County

The same traffic breakdown for the areas closest to Union County, Iowa.

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