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Clayton County, Iowa Traffic Counts

This page delivers traffic analytics for Clayton County, Iowa. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Clayton County, Iowa among 334 road miles divided in 2,420 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 729 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.

1,350

Trucks

Trucks

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

9.2%

Average travel time

Average travel time

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

37.6 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.

6.8%

Drivers’ average age

Drivers’ average age

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

53.2 yrs

Drivers’ average income

Drivers’ average income

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

$63,497

Our data indicates an estimated average traffic volume of 1,350 vehicles per day in Clayton County, Iowa that results in 421,970 vehicle-miles traveled per day (≈154 million per year). The traffic stream is comprised of an average of 1 truck for every 11 vehicles. Typical time spent behind the wheel per trip is 37.6 minutes, which already accounts for delays at signals, intersections, and congestion.

Analytical insight

When compared to the Iowa state averages: At 1,350 vehicles per day, the average monitored road in Clayton carries 56% less traffic than the state average of 3,042 vehicles per day - a critical factor for logistics and site planning. Across the whole network that adds up to 421,970 vehicle-miles traveled per day (≈154 million per year), roughly 0.5% of Iowa's statewide total. Journey times run 14% higher than the state level, at 37.6 minutes on average. Congestion runs 40% lower than the state level, at a ratio of 6.8% - smoother traffic flow - crucial for traffic control improvement and logistics planning. Clayton carries more traffic than 29% of counties in Iowa. 84% of counties in Iowa have a shorter average travel time than Clayton's 37.6 minutes.

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.

1,350

Trucks

Trucks

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

9.2%

Average travel time

Average travel time

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

37.6 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.

6.8%

Drivers’ average age

Drivers’ average age

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

53.2 yrs

Drivers’ average income

Drivers’ average income

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

$63,497

The non-highway road network in Clayton County, Iowa supports a substantial volume of traffic. The average non-highway road carries 1,350 vehicles per day. That average covers 334 non-highway road miles divided in 2,420 segments (average segment length 729 ft), together carrying 421,970 vehicle-miles traveled per day (≈154 million per year). Trucks constitute 9.2% of non-highway traffic.

Analytical insight

At 39% lower than the state level, the non-highway congestion ratio of 6.8% signals easier movement on local roads. Overall, average travel time here is longer than 84% of counties in Iowa. Clayton's average driver income exceeds 6% of counties in Iowa. Clayton's median driver age is higher than 96% of counties in Iowa.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 10:00 AM–12:00 PM and PM peak 3:00 PM–7:00 PM, with volumes reaching approximately 81% higher than the daily average.
Weekend traffic:
Weekend volumes run about 24% below weekday levels.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
May–July is the high season, with volumes +11% versus the annual average.
Lowest month:
February is the quietest month, with volumes -17% versus the annual average.

Analytical insight

In Clayton County, Iowa, the peak hour concentrates about 8% of the day's traffic, and seasonal swing is pronounced at +11% in high season.

Traffic Flow Profile Comparison

Metric

Clayton

Iowa
Average

Difference

Traffic

1,350

3,042

-55.6%

Truck % (Total Traffic)

9.2%

11.0%

-16.5%

Truck % (Highway)

16.1%

Avg. Travel Time

37.6 min

33.0 min

+14.0%

How Clayton County compares

Clayton County against nearby areas

Clayton County tracks the 4 areas around it closely - no measure in this table sets it far apart from the areas immediately next to it, though it has the fourth busiest roads of the five. Quiet roads and long journeys - a rural pattern, where the distance between destinations rather than the traffic on the way is what takes the time.

Clayton 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
Clayton County1,3509.2%421,97037.6 min6.8%
Delaware County, Iowa1,48611.3%611,00331.5 min6.9%
Fayette County, Iowa1,2039.1%346,06632.5 min5.6%
Grant County, Wisconsin2,30411.2%1,101,47933.1 min9.1%
Buchanan County, Iowa2,25911.5%938,19333.5 min9.1%
Iowa average3,04211.0%N/A33.0 min11.4%

Clayton County ranked within Iowa

Average driver age places Clayton County #5 of 99 in Iowa - the top quarter of the state.

Where Clayton 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.
MeasureClayton CountyIowa rank
Traffic volume (AADT)1,350#71 of 99
Average travel time37.6 min#17 of 99
Average driver income$63,497#93 of 99
Average driver age53.2 yrs#5 of 99

Clayton County ranks #5 of 99 on average driver age but #93 of 99 on average driver income. The driver population here skews older and lower-income than most of Iowa.

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 Clayton County

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

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