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Traffic heat map of Henry County, Iowa: 283 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Avenue of the Saints

Henry County, Iowa Traffic Counts

Its busiest road, Avenue of the Saints, carries 11,679 vehicles a day, 6.6 times the average road. This page breaks down traffic in Henry County, Iowa across 283 miles of monitored roads split into 2,760 segments, using multi-sourced mobile and sensor data. It goes beyond raw counts to truck flow, congestion and who is driving, so site selection and route planning rest on evidence.
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 Henry County, Iowa

Traffic

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

vehicles per day1,778
Trucks

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

12.3%
Average travel time

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

32.1 min
Congestion ratio

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

6.1%
Drivers’ average age

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

48.9 yrs
Drivers’ average income

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

$70,661

A typical monitored road in Henry County, Iowa sees 1,778 vehicles per day, while its 283 miles of monitored roads together handle 590,232 vehicle-miles traveled per day (≈215 million per year). About 1 in 8 vehicles is a truck, in line with Iowa (11.0%).

Congestion 46% below the Iowa average

Henry's average daily traffic volume is 42% lower than the state average - 1,778 vehicles per day against 3,042 - suggesting less traffic load per road - lighter roads for freight, but less passing trade for roadside retail. Across the whole network, that travel is about 0.7% of Iowa's statewide total. Henry carries more traffic than 54% of counties in Iowa.

At 32.1 minutes, the average travel time matches the state level closely. On travel time, Henry runs shorter than 71% of counties in Iowa.

At 46% lower than the state level, the 6.1% congestion ratio signals smoother traffic flow - travel times are easy to plan around for scheduled deliveries.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Henry County, Iowa

Trafficvehicles per day4,001
Trucks15.1%
Average travel time49.3 min
Congestion ratio8.6%
Drivers’ average age49.4 yrs
Drivers’ average income$71,878

Highways carry more than half of all travel in Henry County, Iowa (67% of vehicle-miles). The average highway carries 4,001 vehicles per day, 157% more than the average non-highway road in the same area, which carries 1,559 vehicles per day.

Highways make up 34% of the monitored road miles (95 miles, 248 segments), so they carry more than their share: 395,402 vehicle-miles traveled per day (≈144 million per year).

That is more highway travel volume than 64% of counties in Iowa.

A typical mix of freight and passenger traffic

At 15.1%, highway truck share is 6% lower than the state average. The highway traffic mix is typical for Iowa: neither freight- nor commuter-dominated.

Henry's highway truck share (15.1%) is higher than 58% of counties in Iowa. Henry's highway truck count is lower than 55% of counties in Iowa, at roughly 603 trucks per day.

non-highway traffic icon

Non-highway Traffic in Henry County, Iowa

Trafficvehicles per day1,559
Trucks6.8%
Average travel time30.4 min
Congestion ratio5.9%
Drivers’ average age48.4 yrs
Drivers’ average income$69,533

Local roads carry a significant share of travel in Henry County, Iowa: 33% of all vehicle-miles. A typical local road sees 1,559 vehicles per day.

Local roads make up 66% of the monitored road miles (188 miles in 2,512 segments) but carry less than their share of travel: 194,829 vehicle-miles traveled per day (≈71.1 million per year). The truck share on non-highway roads is 6.8%.

Local congestion 47% below the Iowa average

Non-highway roads carry a truck concentration that's 55% lower than the highway network.

The non-highway congestion ratio of 5.9% is 47% lower than the state level, suggesting more efficient local mobility than the state average.

62% of counties in Iowa see higher average driver income among trip origins than Henry. The driver population here skews younger than 60% of counties in Iowa.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
A long morning plateau from 7:00 AM to 12:00 PM and a long afternoon plateau from 3:00 PM to 7:00 PM, with volumes reaching approximately 71% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 10% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +7% versus the annual average.
Lowest month:
January is the quietest month, with volumes -13% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

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

Henry County vs. Iowa Traffic Comparison

Henry County's biggest difference from the Iowa average is its average daily traffic per road, 42% below it.

MetricHenry CountyIowa averageDifference
Traffic1,7783,042-41.5%
Truck % (Total Traffic)12.3%11.0%+12.2%
Truck % (Highway)15.1%16.1%-6.3%
Avg. Travel Time32.1 min33.0 min-2.6%

How Henry County compares

Henry County has a higher truck share than any nearby county

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

Henry 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
Henry County1,77812.3%590,23232.1 min6.1%
Des Moines County, Iowa2,8978.0%639,86030.8 min8.1%
Jefferson County, Iowa1,67210.0%359,54532.6 min6.9%
Louisa County, Iowa1,18010.7%238,87438.6 min5.3%
Washington County, Iowa1,82610.4%648,07232.0 min7.7%
Iowa average3,04211.0%N/A33.0 min11.4%

Henry County ranked within Iowa

Henry County ranked among 99 county-level areas in Iowa (1 = highest); measures without data in every county rank a smaller field, down to 70.
MeasureHenry CountyIowa rank
Traffic volume (AADT)1,778#46 of 99
Highway vehicle-miles per day395,402#26 of 70
Truck share on highways15.1%#30 of 70
Highway trucks per day603#39 of 70
Average travel time32.1 min#70 of 99
Average driver income$70,661#62 of 99
Average driver age48.9 yrs#59 of 99

Busiest roads in Henry County, Iowa

The three busiest roads in Henry County average 9,852 vehicles a day, 5.5 times the county average of 1,778 across all its monitored roads.

Avenue of the Saints is the busiest road, at 11,679 vehicles a day, 1,722 of them trucks (14.8%). It also carries the most trucks.

Avenue of the Saints carries longer journeys than most roads here, with a median trip of 54.3 minutes against 32.1 county-wide.

Washington Street is busy with cars rather than freight: only 5.8% of its traffic is trucks, against 12.3% county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Avenue of the SaintsTrunk road · 11,679vehicles1,722trucks · 14.8%
Road class
Trunk road
Congestion ratio
13.6%
Median trip time
54.3 min
Drivers’ median age
48.0 yrs
Drivers’ average income
$74,113

A main artery: Avenue of the Saints's busiest stretch carries 6.6 times the county average; trucks are 14.8% of it, above the county-wide 12.3%.

2Washington StreetSecondary road · 9,685vehicles563trucks · 5.8%
Road class
Secondary road
Congestion ratio
13.8%
Median trip time
31.7 min
Drivers’ median age
48.5 yrs
Drivers’ average income
$65,540

Washington Street is a trunk route for the county, carrying 5.4 times the county average on its busiest stretch; trucks are 5.8% of it, below the county-wide 12.3%.

3US 34Trunk road · 8,192vehicles804trucks · 9.8%
Road class
Trunk road
Median trip time
34.7 min
Drivers’ median age
49.7 yrs
Drivers’ average income
$69,688

The busiest stretch of US 34 carries 4.6 times the county average; trucks are 9.8% of it, below the county-wide 12.3%.

4Grand AvenueSecondary road · 6,194vehicles322trucks · 5.2%
Road class
Secondary road
Congestion ratio
18.4%
Median trip time
31.8 min
Drivers’ median age
48.1 yrs
Drivers’ average income
$67,625

Grand Avenue is one of the more congested roads here: trips take 18% longer than at free-flow speed, against 6% county-wide.

5Old US 218Secondary road · 5,793vehicles335trucks · 5.8%
Road class
Secondary road
Congestion ratio
6.3%
Median trip time
40.4 min
Drivers’ median age
49.4 yrs
Drivers’ average income
$73,140

On its busiest stretch, Old US 218 carries 3.3 times the county average; trucks are 5.8% of it, below the county-wide 12.3%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Avenue of the SaintsTrunk road · #1 by traffic11,679vehicles1,722trucks · 14.8%
2US 34Trunk road · #3 by traffic8,192vehicles804trucks · 9.8%
3US 218 BusinessMotorway · 3,906vehicles618trucks · 15.8%
Road class
Motorway
Congestion ratio
11.5%
Median trip time
44.2 min
Drivers’ median age
50.5 yrs
Drivers’ average income
$70,543

Drivers on US 218 Business are on long journeys, a median 44.2 minutes against 32.1 county-wide: a through route more than a local street.

4Washington StreetSecondary road · #2 by traffic9,685vehicles563trucks · 5.8%
5US 34 BusinessTrunk road · 4,812vehicles434trucks · 9.0%
Road class
Trunk road
Median trip time
34.1 min
Drivers’ median age
50.0 yrs
Drivers’ average income
$69,369

US 34 Business peaks at 4,812 vehicles a day, 2.7 times the county average; trucks are 9.0% of it, below the county-wide 12.3%.

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

HenryDepartment 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 Henry County

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

Need segment-level traffic data?

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