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Traffic heat map of Monona County, Iowa: 285 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 29 and Iowa Avenue

Monona County, Iowa Traffic Counts

How busy are the roads of Monona County, Iowa? We measure 285 road miles, divided into 1,363 segments, with multi-sourced, cross-verified mobile and sensor data. About 1 in 6 vehicles here is a truck, against 1 in 9 across Iowa. The breakdown below covers volume, trucks, congestion and driver profiles for retailers, logistics planners and engineers.
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 Monona County, Iowa

Traffic

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

vehicles per day1,358
Trucks

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

17.4%
Average travel time

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

34.0 min
Congestion ratio

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

11.1%
Drivers’ average age

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

50.4 yrs
Drivers’ average income

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

$70,330

The average monitored road in Monona County, Iowa carries 1,358 vehicles per day. Across its 285 miles of monitored roads, that adds up to 580,320 vehicle-miles traveled per day (≈212 million per year). Freight weighs heavily here: trucks are 17.4% of traffic, against 11.0% across Iowa.

Traffic 55% below the Iowa average

Monona's average daily traffic volume is 55% lower than the state average - 1,358 vehicles per day against 3,042 - suggesting less traffic load per road - very light roads: easy truck access, but little passing trade for roadside retail. Across the whole network, that travel is about 0.7% of Iowa's statewide total. Monona carries less traffic than 70% of counties in Iowa.

Journey times here (34.0 minutes on average) closely track the state level. Its average travel time of 34.0 minutes is longer than 57% of counties in Iowa.

At 11.1%, the congestion ratio matches the state level closely.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Monona County, Iowa

Trafficvehicles per day6,823
Trucks21.7%
Average travel time64.4 min
Congestion ratio14.3%
Drivers’ average age47.6 yrs
Drivers’ average income$75,567

Highways carry more than half of all travel in Monona County, Iowa (69% of vehicle-miles). The average highway carries 6,823 vehicles per day, 449% more than the average non-highway road in the same area, which carries 1,243 vehicles per day.

Yet highways are only 18% of the road network, 52 miles in 28 segments, so each mile of them is 3.8 times as busy as the average road mile.

65% of counties in Iowa move less traffic on their highways.

Higher highway truck share than 80% of counties in Iowa

Highway truck concentration here runs 35% higher than the state average, at 21.7%. Highways here lean toward freight, so highway access is a real asset for logistics operators.

By truck concentration, highways here outrank 80% of counties in Iowa. 75% of counties in Iowa see fewer highway trucks per day than Monona's roughly 1,478.

non-highway traffic icon

Non-highway Traffic in Monona County, Iowa

Trafficvehicles per day1,243
Trucks8.2%
Average travel time33.4 min
Congestion ratio11.1%
Drivers’ average age52.1 yrs
Drivers’ average income$66,643

A significant share of driving in Monona County, Iowa, 31% of vehicle-miles, happens on local roads. A typical local road sees 1,243 vehicles per day.

Spread over 233 miles and 1,335 segments, 82% of the road network, local roads carry a lighter load per mile: 181,070 vehicle-miles traveled per day (≈66.1 million per year). About 1 in 12 vehicles on non-highway roads is a truck (8.2%).

Drivers from lower-income areas than 67% of counties in Iowa

Compared to highways, non-highway routes see 62% fewer trucks by share.

Non-highway congestion here (11.1%) closely tracks the state average.

Trip origins here have lower average income than 67% of counties in Iowa. The driver population here skews older than 50% of counties in Iowa.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
A long morning plateau from 8:00 AM to 12:00 PM and a long afternoon plateau from 3:00 PM to 7:00 PM, with volumes reaching approximately 67% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 9% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +15% versus the annual average.
Lowest month:
January is the quietest month, with volumes -25% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Monona County, Iowa, the peak hour concentrates about 7% of the day's traffic, and there is a strong seasonal swing of +15% in high season.

Monona County vs. Iowa Traffic Comparison

Monona County's biggest difference from the Iowa average is its truck share, 58% above it. Its average daily traffic per road, by contrast, is 55% below.

MetricMonona CountyIowa averageDifference
Traffic1,3583,042-55.4%
Truck % (Total Traffic)17.4%11.0%+58.5%
Truck % (Highway)21.7%16.1%+34.5%
Avg. Travel Time34.0 min33.0 min+3.2%

How Monona County compares

Monona County has a higher truck share than any nearby county

Compared with its 4 closest neighbours, Monona County carries 36.3% less traffic on a typical road and runs 6.5 percentage points more truck traffic; it has the quietest roads of the five. Freight passes through here that never reaches the areas around it: the truck share is high precisely because the local car traffic is not.

Monona 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
Monona County1,35817.4%580,32034.0 min11.1%
Burt County, Nebraska1,5858.9%184,47033.0 minN/A
Woodbury County, Iowa3,4679.5%1,970,56631.6 min12.6%
Harrison County, Iowa2,05015.4%854,64935.6 minN/A
Crawford County, Iowa1,4229.9%368,22437.9 minN/A
Iowa average3,04211.0%N/A33.0 min11.4%

Monona County ranked within Iowa

Truck share on highways places Monona County #15 of 70 in Iowa - the top quarter of the state.

Monona County ranked among 99 county-level areas in Iowa (1 = highest); measures without data in every county rank a smaller field, down to 70.
MeasureMonona CountyIowa rank
Traffic volume (AADT)1,358#70 of 99
Highway vehicle-miles per day399,250#25 of 70
Truck share on highways21.7%#15 of 70
Highway trucks per day1,478#18 of 70
Average travel time34.0 min#43 of 99
Average driver income$70,330#67 of 99
Average driver age50.4 yrs#50 of 99

Busiest roads in Monona County, Iowa

The three busiest roads in Monona County average 9,906 vehicles a day, 7.3 times the county average of 1,358 across all its monitored roads.

I 29 is the busiest road, at 15,487 vehicles a day, 3,355 of them trucks (21.7%). No other road comes close: Iowa Avenue, in second place, carries 7,683. It tops the truck ranking too, with the most trucks.

I 29 carries longer journeys than most roads here, with a median trip of 64.4 minutes against 34.0 county-wide.

Few trucks use Iowa Avenue: 5.5% of its traffic, under half the county's 17.4%.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 29Motorway · 15,487vehicles3,355trucks · 21.7%
Road class
Motorway
Congestion ratio
14.3%
Median trip time
64.4 min
Drivers’ median age
47.6 yrs
Drivers’ average income
$75,567

At 11.4 times the county average, I 29 draws drivers from neighborhoods averaging $75,567 in household income.

2Iowa AvenuePrimary road · 7,683vehicles420trucks · 5.5%
Road class
Primary road
Congestion ratio
23.2%
Median trip time
31.7 min
Drivers’ median age
51.6 yrs
Drivers’ average income
$63,945

Iowa Avenue is one of the more congested roads here: trips take 23% longer than at free-flow speed, against 11% county-wide.

3IA 175Primary road · 6,549vehicles408trucks · 6.2%
Road class
Primary road
Congestion ratio
19.5%
Median trip time
35.6 min
Drivers’ median age
50.0 yrs
Drivers’ average income
$65,375

Delays build on IA 175: its congestion ratio of 20% over free-flow time is well above the county's 11%.

44th StreetPrimary road · 3,197vehicles293trucks · 9.2%
Road class
Primary road
Congestion ratio
8.9%
Median trip time
34.9 min
Drivers’ median age
52.3 yrs
Drivers’ average income
$61,501

On its busiest stretch, 4th Street carries 2.4 times the county average; trucks are 9.2% of it, below the county-wide 17.4%.

510th StreetSecondary road · 2,691vehicles129trucks · 4.8%
Road class
Secondary road
Median trip time
35.0 min
Drivers’ median age
52.5 yrs
Drivers’ average income
$65,519

10th Street peaks at 2,691 vehicles a day, 2.0 times the county average; trucks are 4.8% of it, below the county-wide 17.4%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 29Motorway · #1 by traffic15,487vehicles3,355trucks · 21.7%
2Iowa AvenuePrimary road · #2 by traffic7,683vehicles420trucks · 5.5%
3IA 175Primary road · #3 by traffic6,549vehicles408trucks · 6.2%
44th StreetPrimary road · #4 by traffic3,197vehicles293trucks · 9.2%
51st StreetPrimary road · 1,295vehicles165trucks · 12.8%
Road class
Primary road
Median trip time
41.4 min
Drivers’ median age
52.6 yrs
Drivers’ average income
$61,471

Even at its busiest, 1st Street carries about the same as the county average; trucks are 12.8% of it, below the county-wide 17.4%.

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

MononaDepartment 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 Monona County

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

Need segment-level traffic data?

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