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Traffic heat map of Iowa County, Wisconsin: 471 miles of roads shaded from blue (light) to red (heavy traffic), busiest on US 18 and 151 and Bequette Street

Iowa County, Wisconsin Traffic Counts

How busy are the roads of Iowa County, Wisconsin? We measure 471 road miles, divided into 4,098 segments, with multi-sourced, cross-verified mobile and sensor data. Trips here are among the 5 longest of any county in Wisconsin. 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 Volume & Performance in Iowa County, Wisconsin

Traffic

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

vehicles per day1,672
Trucks

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

10.2%
Average travel time

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

37.5 min
Congestion ratio

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

6.9%
Drivers’ average age

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

47.7 yrs
Drivers’ average income

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

$80,634

Our data shows 1,672 vehicles per day on the average road in Iowa County, Wisconsin, and 842,613 vehicle-miles traveled per day (≈308 million per year) across its 471 miles of monitored roads. Trucks are 10.2% of traffic, close to the 10.2% across Wisconsin.

Longer trips than 96% of counties in Wisconsin

Iowa's average daily traffic volume is 56% lower than the state average - 1,672 vehicles per day against 3,802 - 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 0.6% of Wisconsin's statewide total. By volume, Iowa's 1,672 vehicles per day trails 80% of counties in Wisconsin.

Journey times run 17% higher than the state level, at 37.5 minutes on average. On travel time, Iowa runs longer than 96% of counties in Wisconsin.

At 45% lower than the state level, the 6.9% congestion ratio signals smoother traffic flow - fewer delays make delivery windows more reliable.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Iowa County, Wisconsin

Trafficvehicles per day6,234
Trucks12.6%
Average travel time53.9 min
Congestion ratio13.3%
Drivers’ average age45.2 yrs
Drivers’ average income$79,857

Highways carry a significant share of travel in Iowa County, Wisconsin: 45% of all vehicle-miles. The average highway carries 6,234 vehicles per day, 331% more than the average non-highway road in the same area, which carries 1,447 vehicles per day.

That comes from just 13% of the monitored road miles: 61 miles in 193 segments, carrying 376,266 vehicle-miles traveled per day (≈137 million per year).

Lower highway truck share than 70% of counties in Wisconsin

Highway truck concentration here runs 14% lower than the state average, at 12.6%. The highway traffic mix is typical for Wisconsin: neither freight- nor commuter-dominated.

Iowa's highway truck share (12.6%) is lower than 70% of counties in Wisconsin. Iowa's highway truck count is lower than 70% of counties in Wisconsin, at roughly 784 trucks per day.

non-highway traffic icon

Non-highway Traffic in Iowa County, Wisconsin

Trafficvehicles per day1,447
Trucks8.3%
Average travel time36.8 min
Congestion ratio6.5%
Drivers’ average age50.1 yrs
Drivers’ average income$81,045

A little more than half of the driving in Iowa County, Wisconsin happens on local roads: 55% of all vehicle-miles. A typical local road sees 1,447 vehicles per day.

Local roads make up 87% of the monitored road miles (410 miles in 3,905 segments) but carry less than their share of travel: 466,347 vehicle-miles traveled per day (≈170 million per year). About 1 in 12 vehicles on non-highway roads is a truck (8.3%).

Younger drivers than 79% of counties in Wisconsin

Non-highway roads carry a truck concentration that's 34% lower than the highway network.

Non-highway congestion (6.5%) runs 46% lower than the state average, pointing to smoother local traffic flow.

Iowa's average driver income is higher than 73% of counties in Wisconsin. The driver population here skews younger than 79% of counties in Wisconsin.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 9:00 AM–12:00 PM and PM peak 3:00 PM–6:00 PM, with volumes reaching approximately 93% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 14% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
May–July is the high season, with volumes +10% versus the annual average.
Lowest month:
January is the quietest month, with volumes -18% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Iowa County, Wisconsin, the peak hour concentrates about 8% of the day's traffic, and there is a noticeable seasonal swing of +10% in high season.

Iowa County vs. Wisconsin Traffic Comparison

The average daily traffic per road sets Iowa County apart: 56% below the Wisconsin average. Its average travel time, by contrast, is 17% above.

MetricIowa CountyWisconsin averageDifference
Traffic1,6723,802-56.0%
Truck % (Total Traffic)10.2%10.2%+0.2%
Truck % (Highway)12.6%14.7%-14.5%
Avg. Travel Time37.5 min32.2 min+16.8%

How Iowa County compares

Iowa County against nearby counties

Iowa 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 third 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.

Iowa County and the 4 nearest county-level areas by centroid distance, with the Wisconsin average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Iowa County1,67210.2%842,61337.5 min6.9%
Lafayette County, Wisconsin1,35510.8%451,71936.9 min6.1%
Richland County, Wisconsin1,5949.4%290,73331.7 min7.0%
Grant County, Wisconsin2,30411.2%1,101,47933.1 min9.1%
Sauk County, Wisconsin3,59413.4%1,926,83732.6 min11.2%
Wisconsin average3,80210.2%N/A32.2 min12.6%

Iowa County ranked within Wisconsin

Iowa County sits in the top quarter of the Wisconsin field on average travel time, at #4 of 72.

Iowa County ranked among 72 county-level areas in Wisconsin (1 = highest); measures without data in every county rank a smaller field, down to 58.
MeasureIowa CountyWisconsin rank
Traffic volume (AADT)1,672#58 of 72
Highway vehicle-miles per day376,266#40 of 58
Truck share on highways12.6%#41 of 58
Highway trucks per day784#41 of 58
Average travel time37.5 min#4 of 72
Average driver income$80,634#20 of 72
Average driver age47.7 yrs#57 of 72

Iowa County ranks #4 of 72 on average travel time but #58 of 72 on average daily traffic volume - the two describe the same roads and are worth reading together rather than either on its own.

Busiest roads in Iowa County, Wisconsin

Traffic concentrates on a few corridors: the three busiest roads average 12,075 vehicles a day, against 1,672 on the average road in Iowa County.

US 18 and 151 is the busiest road, at 15,425 vehicles a day, 1,874 of them trucks (12.2%). It tops the truck ranking too, with the most trucks.

US 18 and 151 carries longer journeys than most roads here, with a median trip of 56.3 minutes against 37.5 county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1US 18 and 151Trunk road · 15,425vehicles1,874trucks · 12.2%
Road class
Trunk road
Congestion ratio
15.9%
Median trip time
56.3 min
Drivers’ median age
45.8 yrs
Drivers’ average income
$88,534

US 18 and 151 carries 9.2 times the county average at its busiest, 1,874 of them trucks (12.2%, above the county-wide 10.2%).

2US 151Trunk road · 12,056vehicles1,299trucks · 10.8%
Road class
Trunk road
Congestion ratio
13.6%
Median trip time
46.8 min
Drivers’ median age
44.3 yrs
Drivers’ average income
$76,229

US 151 carries 7.2 times the county average on its busiest stretch, where the median trip lasts 46.8 minutes.

3Bequette StreetPrimary road · 8,744vehicles746trucks · 8.5%
Road class
Primary road
Congestion ratio
15.0%
Median trip time
36.7 min
Drivers’ median age
51.5 yrs
Drivers’ average income
$91,354

At 5.2 times the county average, Bequette Street draws drivers from neighborhoods averaging $91,354 in household income.

4Dodgeville ExpresswayPrimary road · 7,692vehicles679trucks · 8.8%
Road class
Primary road
Congestion ratio
8.7%
Median trip time
42.5 min
Drivers’ median age
50.2 yrs
Drivers’ average income
$86,041

Dodgeville Expressway carries 4.6 times the county average at its busiest, 679 of them trucks (8.8%, below the county-wide 10.2%).

5WI 23Primary road · 7,312vehicles584trucks · 8.0%
Road class
Primary road
Congestion ratio
17.0%
Median trip time
31.3 min
Drivers’ median age
49.2 yrs
Drivers’ average income
$88,330

Delays build on WI 23: its congestion ratio of 17% over free-flow time is well above the county's 7%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1US 18 and 151Trunk road · #1 by traffic15,425vehicles1,874trucks · 12.2%
2US 151Trunk road · #2 by traffic12,056vehicles1,299trucks · 10.8%
3Bequette StreetPrimary road · #3 by traffic8,744vehicles746trucks · 8.5%
4Dodgeville ExpresswayPrimary road · #4 by traffic7,692vehicles679trucks · 8.8%
5US 14Primary road · 6,787vehicles653trucks · 9.6%
Road class
Primary road
Congestion ratio
17.2%
Median trip time
40.9 min
Drivers’ median age
49.9 yrs
Drivers’ average income
$84,257

Travel on US 14's busiest stretch runs 17% over free-flow time, against 7% across the county, so expect slower peak hours.

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

IowaDepartment 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 Iowa County

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

Need segment-level traffic data?

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