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Traffic heat map of Adams County, Iowa: 110 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Quincy Street and US 34

Adams County, Iowa Traffic Counts

The average road here carries 982 vehicles a day, 68% less than the Iowa average of 3,042. This page breaks down traffic in Adams County, Iowa across 110 miles of monitored roads split into 891 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 Adams County, Iowa

Traffic

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

vehicles per day982
Trucks

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

9.5%
Average travel time

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

38.9 min
Drivers’ average age

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

54.4 yrs
Drivers’ average income

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

$64,629

A typical monitored road in Adams County, Iowa sees 982 vehicles per day, while its 110 miles of monitored roads together handle 108,629 vehicle-miles traveled per day (≈39.6 million per year). About 1 in 11 vehicles is a truck, in line with Iowa (11.0%).

Quieter roads than 94% of counties in Iowa

Adams's average daily traffic volume is 68% lower than the state average - 982 vehicles per day against 3,042 - suggesting less traffic load per road - quiet roads that suit freight movement more than drive-by retail. In total volume terms, its road network carries about 0.1% of Iowa's statewide total of vehicle-miles. 94% of counties in Iowa see more traffic than Adams's 982 vehicles per day.

The average trip takes 38.9 minutes, 18% higher than the state level. On travel time, Adams runs longer than 91% of counties in Iowa.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

In Adams County, Iowa, the peak hour concentrates about 7% of the day's traffic.

Adams County vs. Iowa Traffic Comparison

Adams County's biggest difference from the Iowa average is its average daily traffic per road, 68% below it. Its average travel time, by contrast, is 18% above.

MetricAdams CountyIowa averageDifference
Traffic9823,042-67.7%
Truck % (Total Traffic)9.5%11.0%-13.7%
Avg. Travel Time38.9 min33.0 min+17.9%

How Adams County compares

Adams County moves the least traffic of its nearby counties

Set against the average of the 4 areas nearest to it, Adams County moves 32.9% of the total daily travel and carries 44.4% less traffic on a typical road; it has the fourth busiest roads of the five. Quieter and more local than the areas around it on both counts: less traffic, and less of what there is arriving by truck.

Adams 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
Adams County9829.5%108,62938.9 minN/A
Taylor County, Iowa7989.8%128,03930.6 minN/A
Union County, Iowa2,5287.6%249,51531.5 min4.8%
Montgomery County, Iowa1,9339.1%246,57534.7 minN/A
Adair County, Iowa1,81024.8%694,62035.6 minN/A
Iowa average3,04211.0%N/A33.0 min11.4%

Adams County ranked within Iowa

Adams County sits in Iowa's top three on average driver age.

Adams County ranked among 99 county-level areas in Iowa (1 = highest).
MeasureAdams CountyIowa rank
Traffic volume (AADT)982#93 of 99
Average travel time38.9 min#10 of 99
Average driver income$64,629#89 of 99
Average driver age54.4 yrs#2 of 99

Adams County ranks #10 of 99 on average travel time but #93 of 99 on average daily traffic volume. Some of the longest trips in Iowa on some of its emptiest roads - distance, not congestion, is what sets travel time here.

Busiest roads in Adams County, Iowa

On their busiest stretches, the three busiest roads in Adams County carry 2,346 vehicles a day on average, 2.4 times the typical road in the county (982).

Quincy Street is the busiest road, at 2,690 vehicles a day, 186 of them trucks (6.9%). US 34 carries the most trucks, 256 a day (10.1% of its traffic), although it ranks #2 for all traffic.

Few trucks use 6th Street: 4.4% of its traffic, under half the county's 9.5%.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Quincy StreetPrimary road · 2,690vehicles186trucks · 6.9%
Road class
Primary road
Median trip time
45.0 min
Drivers’ median age
55.0 yrs
Drivers’ average income
$61,931

Quincy Street peaks at 2,690 vehicles a day, 2.7 times the county average; trucks are 6.9% of it, below the county-wide 9.5%.

2US 34Primary road · 2,530vehicles256trucks · 10.1%
Road class
Primary road
Median trip time
39.4 min
Drivers’ median age
53.6 yrs
Drivers’ average income
$64,474

US 34 carries 2.6 times the county average at its busiest, 256 of them trucks (10.1%, above the county-wide 9.5%).

36th StreetTertiary road · 1,818vehicles81trucks · 4.4%
Road class
Tertiary road
Median trip time
32.7 min
Drivers’ median age
54.9 yrs
Drivers’ average income
$61,598

6th Street carries 85% more than the county average on its busiest stretch, where the median trip lasts 32.7 minutes.

4IA 148Primary road · 1,682vehicles138trucks · 8.2%
Road class
Primary road
Median trip time
33.1 min
Drivers’ median age
55.2 yrs
Drivers’ average income
$64,872

At 71% more than the county average, IA 148 draws drivers from neighborhoods averaging $64,872 in household income.

5IA 25Primary road · 1,187vehicles118trucks · 9.9%
Road class
Primary road
Median trip time
28.8 min
Drivers’ median age
50.2 yrs
Drivers’ average income
$67,396

Trips on IA 25 are short, a median 28.8 minutes against 38.9 county-wide, so it mostly serves local errands and commutes.

Ranked by trucks per day

Cars and light vehiclesTrucks
1US 34Primary road · #2 by traffic2,530vehicles256trucks · 10.1%
2Quincy StreetPrimary road · #1 by traffic2,690vehicles186trucks · 6.9%
3IA 148Primary road · #4 by traffic1,682vehicles138trucks · 8.2%
4Juniper AvenuePrimary road · 1,028vehicles119trucks · 11.6%
Road class
Primary road
Median trip time
31.0 min
Drivers’ median age
53.2 yrs
Drivers’ average income
$71,139

Juniper Avenue is a quieter road: its busiest stretch carries about the same as the county average; trucks are 11.6% of it, above the county-wide 9.5%.

5IA 25Primary road · #5 by traffic1,187vehicles118trucks · 9.9%
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

AdamsDepartment 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 Adams County

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

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