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Traffic heat map of Poweshiek County, Iowa: 287 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 80 and West Street South

Poweshiek County, Iowa Traffic Counts

Its highways rank among the top 5 counties in Iowa for trucks per day. This page breaks down traffic in Poweshiek County, Iowa across 287 miles of monitored roads split into 1,801 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 Volume & Performance in Poweshiek County, Iowa

Traffic

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

vehicles per day2,008
Trucks

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

20.4%
Average travel time

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

31.3 min
Congestion ratio

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

6.7%
Drivers’ average age

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

45.8 yrs
Drivers’ average income

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

$69,520

A typical monitored road in Poweshiek County, Iowa sees 2,008 vehicles per day, while its 287 miles of monitored roads together handle 768,562 vehicle-miles traveled per day (≈281 million per year). About 1 in 5 vehicles is a truck, well above the 11.0% across Iowa - a freight-heavy mix.

Shorter trips than 83% of counties in Iowa

Poweshiek sees 34% lower average daily traffic volume than the state average (2,008 vehicles per day against 3,042), suggesting less demand on each road - less drive-by exposure for retail, but easier access for deliveries. Network-wide, Poweshiek accounts for about 0.9% of Iowa's statewide total of vehicle-miles. Poweshiek carries more traffic than 65% of counties in Iowa.

The average trip takes 31.3 minutes, 5% lower than the state level. Its average travel time of 31.3 minutes is shorter than 83% of counties in Iowa.

The congestion ratio of 6.7% is 42% lower, pointing to smoother traffic flow than the state level - travel times are easy to plan around for scheduled deliveries.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Poweshiek County, Iowa

Trafficvehicles per day8,549
Trucks27.4%
Average travel time62.4 min
Congestion ratio19.4%
Drivers’ average age43.8 yrs
Drivers’ average income$79,252

Highways carry more than half of all travel in Poweshiek County, Iowa (62% of vehicle-miles). The average highway carries 8,549 vehicles per day, 396% more than the average non-highway road in the same area, which carries 1,724 vehicles per day.

Yet highways are only 17% of the road network, 50 miles in 75 segments, so each mile of them is 3.6 times as busy as the average road mile.

That is more highway travel volume than 71% of counties in Iowa.

Higher highway truck share than 99% of counties in Iowa

At 27.4%, highway truck share is 70% higher than the state average. That marks Poweshiek as a major freight corridor, where highway access is what logistics operators compete on.

By truck concentration, highways here outrank 99% of counties in Iowa. 96% of counties in Iowa see fewer highway trucks per day than Poweshiek's roughly 2,338.

non-highway traffic icon

Non-highway Traffic in Poweshiek County, Iowa

Trafficvehicles per day1,724
Trucks9.0%
Average travel time30.0 min
Congestion ratio6.1%
Drivers’ average age48.7 yrs
Drivers’ average income$65,826

A significant share of driving in Poweshiek County, Iowa, 38% of vehicle-miles, happens on local roads. On the average non-highway road, that comes to 1,724 vehicles per day.

Spread over 237 miles and 1,726 segments, 83% of the road network, local roads carry a lighter load per mile: 291,262 vehicle-miles traveled per day (≈106 million per year). About 1 in 11 vehicles on non-highway roads is a truck (9.0%).

Younger drivers than 88% of counties in Iowa

Non-highway roads carry a truck concentration that's 67% lower than the highway network.

Non-highway congestion (6.1%) runs 45% lower than the state average, pointing to smoother local traffic flow.

72% of counties in Iowa see higher average driver income among trip origins than Poweshiek. Poweshiek's median driver age is lower than 88% 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 72% higher than the daily average.
Weekend traffic:
Weekends are busier than weekdays: volumes run about 7% above weekday levels, which usually points to leisure, tourism or shopping traffic.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +17% 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 Poweshiek County, Iowa, the peak hour concentrates about 7% of the day's traffic, and there is a strong seasonal swing of +17% in high season.

Poweshiek County vs. Iowa Traffic Comparison

Poweshiek County's biggest difference from the Iowa average is its truck share, 85% above it. Its highway truck share is also 70% above.

MetricPoweshiek CountyIowa averageDifference
Traffic2,0083,042-34.0%
Truck % (Total Traffic)20.4%11.0%+85.4%
Truck % (Highway)27.4%16.1%+69.9%
Avg. Travel Time31.3 min33.0 min-5.0%

How Poweshiek County compares

Poweshiek County has a higher truck share than any nearby county

Set against the average of the 4 areas nearest to it, Poweshiek County runs 6.5 percentage points more truck traffic; it has the third busiest roads of the five. Traffic volume here matches the areas around it, but more of that traffic is trucks - a difference in what routes through, not in how much.

Poweshiek 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
Poweshiek County2,00820.4%768,56231.3 min6.7%
Tama County, Iowa1,38211.0%485,32542.3 min5.6%
Iowa County, Iowa1,72817.9%954,05733.7 min6.5%
Jasper County, Iowa2,01016.5%1,456,63534.7 min6.9%
Mahaska County, Iowa2,12910.3%553,23234.2 min7.4%
Iowa average3,04211.0%N/A33.0 min11.4%

Poweshiek County ranked within Iowa

Poweshiek County sits in Iowa's top three on truck share on highways.

Poweshiek County ranked among 99 county-level areas in Iowa (1 = highest); measures without data in every county rank a smaller field, down to 70.
MeasurePoweshiek CountyIowa rank
Traffic volume (AADT)2,008#35 of 99
Highway vehicle-miles per day477,301#21 of 70
Truck share on highways27.4%#2 of 70
Highway trucks per day2,338#4 of 70
Average travel time31.3 min#82 of 99
Average driver income$69,520#72 of 99
Average driver age45.8 yrs#87 of 99

Poweshiek County ranks #2 of 70 on truck share on highways but #87 of 99 on average driver age - the two describe the same roads and are worth reading together rather than either on its own.

Busiest roads in Poweshiek County, Iowa

Traffic concentrates on a few corridors: the three busiest roads average 10,976 vehicles a day, against 2,008 on the average road in Poweshiek County.

I 80 is the busiest road, at 18,807 vehicles a day, 5,144 of them trucks (27.4%). No other road comes close: West Street South, in second place, carries 7,862. It tops the truck ranking too, with the most trucks.

I 80 carries longer journeys than most roads here, with a median trip of 62.4 minutes against 31.3 county-wide.

Few trucks use West Street: 6.1% of its traffic, under half the county's 20.4%.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 80Motorway · 18,807vehicles5,144trucks · 27.4%
Road class
Motorway
Congestion ratio
19.4%
Median trip time
62.4 min
Drivers’ median age
43.8 yrs
Drivers’ average income
$79,252

Delays build on I 80: its congestion ratio of 19% over free-flow time is well above the county's 7%.

2West Street SouthPrimary road · 7,862vehicles585trucks · 7.4%
Road class
Primary road
Congestion ratio
20.0%
Median trip time
28.1 min
Drivers’ median age
48.4 yrs
Drivers’ average income
$66,246

Travel on West Street South's busiest stretch runs 20% over free-flow time, against 7% across the county, so expect slower peak hours.

3West StreetPrimary road · 6,258vehicles381trucks · 6.1%
Road class
Primary road
Congestion ratio
16.9%
Median trip time
28.4 min
Drivers’ median age
48.8 yrs
Drivers’ average income
$66,000

At 3.1 times the county average, West Street draws drivers from neighborhoods averaging $66,000 in household income.

46th AvenuePrimary road · 4,736vehicles261trucks · 5.5%
Road class
Primary road
Congestion ratio
6.2%
Median trip time
29.8 min
Drivers’ median age
47.9 yrs
Drivers’ average income
$63,104

The busiest stretch of 6th Avenue carries 2.4 times the county average; trucks are 5.5% of it, below the county-wide 20.4%.

5IA 146Primary road · 3,478vehicles259trucks · 7.5%
Road class
Primary road
Congestion ratio
9.1%
Median trip time
34.7 min
Drivers’ median age
48.4 yrs
Drivers’ average income
$70,976

IA 146 peaks at 3,478 vehicles a day, 73% more than the county average; trucks are 7.5% of it, below the county-wide 20.4%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 80Motorway · #1 by traffic18,807vehicles5,144trucks · 27.4%
2West Street SouthPrimary road · #2 by traffic7,862vehicles585trucks · 7.4%
3West StreetPrimary road · #3 by traffic6,258vehicles381trucks · 6.1%
46th AvenuePrimary road · #4 by traffic4,736vehicles261trucks · 5.5%
5IA 146Primary road · #5 by traffic3,478vehicles259trucks · 7.5%
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

PoweshiekDepartment 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 Poweshiek County

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

Need segment-level traffic data?

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