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Traffic heat map of Cass County, Iowa: 288 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 80 and 7th Street

Cass County, Iowa Traffic Counts

Traffic analytics for Cass County, Iowa, calculated from real-world mobile and sensor networks on 2,409 road segments (288 road miles, about 632 ft each). Its highways carry one of the top 5 truck shares of any county in Iowa. Use the figures below to move from assumptions to certainty on retail locations, logistics and road planning.
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 Cass County, Iowa

Traffic

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

vehicles per day2,320
Trucks

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

21.3%
Average travel time

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

40.1 min
Drivers’ average age

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

51.1 yrs
Drivers’ average income

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

$67,225

The average monitored road in Cass County, Iowa carries 2,320 vehicles per day. Across its 288 miles of monitored roads, that adds up to 915,509 vehicle-miles traveled per day (≈334 million per year). Freight weighs heavily here: trucks are 21.3% of traffic, against 11.0% across Iowa.

Longer trips than 96% of counties in Iowa

Cass's average daily traffic volume is 24% lower than the state average - 2,320 vehicles per day against 3,042 - suggesting less traffic load per road - a critical factor for logistics and site planning. In total volume terms, its road network carries about 1.1% of Iowa's statewide total of vehicle-miles. By volume, Cass's 2,320 vehicles per day outpaces 74% of counties in Iowa.

The average trip takes 40.1 minutes, 22% higher than the state level. 96% of counties in Iowa have a shorter average travel time than Cass's 40.1 minutes.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Cass County, Iowa

Trafficvehicles per day4,885
Trucks26.3%
Average travel time66.2 min
Drivers’ average age49.5 yrs
Drivers’ average income$75,211

Highways carry most of the traffic in Cass County, Iowa: 72% of all vehicle-miles. The average highway carries 4,885 vehicles per day, 149% more than the average non-highway road in the same area, which carries 1,963 vehicles per day.

With 29% of the road miles (85 miles in 294 segments), highways punch above their length, carrying 658,360 vehicle-miles traveled per day (≈240 million per year).

That is more highway travel volume than 80% of counties in Iowa.

Higher highway truck share than 96% of counties in Iowa

Highway truck concentration here runs 64% higher than the state average, at 26.3%. That marks Cass as a major freight corridor, where highway access is what logistics operators compete on.

By truck concentration, highways here outrank 96% of counties in Iowa. Cass's highway truck count is higher than 84% of counties in Iowa, at roughly 1,287 trucks per day.

non-highway traffic icon

Non-highway Traffic in Cass County, Iowa

Trafficvehicles per day1,963
Trucks8.2%
Average travel time36.5 min
Drivers’ average age52.9 yrs
Drivers’ average income$62,775

Local roads carry a smaller share of travel in Cass County, Iowa, 28% of vehicle-miles; most driving happens on highways. On the average non-highway road, that comes to 1,963 vehicles per day.

Local roads make up 71% of the monitored road miles (204 miles in 2,115 segments) but carry less than their share of travel: 257,149 vehicle-miles traveled per day (≈93.9 million per year). About 1 in 12 vehicles on non-highway roads is a truck (8.2%).

Drivers from lower-income areas than 80% of counties in Iowa

The concentration of trucks on non-highway roads is 69% lower than on highways.

Cass's average driver income is lower than 80% of counties in Iowa. 65% of counties in Iowa have a younger driver population than Cass.

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 65% higher than the daily average.
Weekend traffic:
Weekends are much quieter: volumes run about 22% below weekday levels, the signature of a commute-driven road network.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
August–October 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 Cass 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.

Cass County vs. Iowa Traffic Comparison

Of the four measures, truck share differs most: Cass County runs 93% above the Iowa average. Its highway truck share is also 64% above.

MetricCass CountyIowa averageDifference
Traffic2,3203,042-23.7%
Truck % (Total Traffic)21.3%11.0%+93.1%
Truck % (Highway)26.3%16.1%+63.6%
Avg. Travel Time40.1 min33.0 min+21.5%

How Cass County compares

Cass County moves more traffic than any nearby county

Compared with its 4 closest neighbours, Cass County moves 3.1 times the total daily travel and runs 7.4 percentage points more truck traffic; it has the busiest roads of the five. Bigger and busier at once: more road than the areas around it and heavier traffic on it, which makes it the centre of gravity for travel in this part of the map.

Cass 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
Cass County2,32021.3%915,50940.1 minN/A
Adair County, Iowa1,81024.8%694,62035.6 minN/A
Montgomery County, Iowa1,9339.1%246,57534.7 minN/A
Adams County, Iowa9829.5%108,62938.9 minN/A
Audubon County, Iowa1,32212.2%150,31633.5 min4.6%
Iowa average3,04211.0%N/A33.0 min11.4%

Cass County ranked within Iowa

Average travel time places Cass County #5 of 99 in Iowa - the top quarter of the state.

Cass County ranked among 99 county-level areas in Iowa (1 = highest); measures without data in every county rank a smaller field, down to 70.
MeasureCass CountyIowa rank
Traffic volume (AADT)2,320#26 of 99
Highway vehicle-miles per day658,360#15 of 70
Truck share on highways26.3%#4 of 70
Highway trucks per day1,287#12 of 70
Average travel time40.1 min#5 of 99
Average driver income$67,225#79 of 99
Average driver age51.1 yrs#35 of 99

The two ends of this table sit far apart: #5 of 99 on average travel time, against #79 of 99 on average driver income.

Busiest roads in Cass County, Iowa

The three busiest roads in Cass County average 12,870 vehicles a day, 5.5 times the county average of 2,320 across all its monitored roads.

I 80 leads with 21,894 vehicles a day, 6,524 of them trucks (29.8%). No other road comes close: 7th Street, in second place, carries 11,741. It also carries the most trucks.

Trips using I 80 are long: a median of 69.1 minutes against 40.1 county-wide, the mark of a through route.

7th Street is busy with cars rather than freight: only 6.0% of its traffic is trucks, against 21.3% county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 80Motorway · 21,894vehicles6,524trucks · 29.8%
Road class
Motorway
Median trip time
69.1 min
Drivers’ median age
49.2 yrs
Drivers’ average income
$80,920

I 80 carries 9.4 times the county average at its busiest, 6,524 of them trucks (29.8%, above the county-wide 21.3%).

27th StreetPrimary road · 11,741vehicles704trucks · 6.0%
Road class
Primary road
Median trip time
36.6 min
Drivers’ median age
53.1 yrs
Drivers’ average income
$57,716

7th Street carries 5.1 times the county average on its busiest stretch, where the median trip lasts 36.6 minutes.

3Southwest 7th StreetPrimary road · 4,974vehicles355trucks · 7.1%
Road class
Primary road
Median trip time
29.4 min
Drivers’ median age
51.9 yrs
Drivers’ average income
$59,537

Trips on Southwest 7th Street are short, a median 29.4 minutes against 40.1 county-wide, so it mostly serves local errands and commutes.

4Poplar StreetPrimary road · 4,318vehicles340trucks · 7.9%
Road class
Primary road
Median trip time
39.4 min
Drivers’ median age
54.3 yrs
Drivers’ average income
$53,576

Poplar Street peaks at 4,318 vehicles a day, 86% more than the county average; trucks are 7.9% of it, below the county-wide 21.3%.

5Whitney StreetTrunk road · 4,048vehicles315trucks · 7.8%
Road class
Trunk road
Median trip time
41.0 min
Drivers’ median age
54.1 yrs
Drivers’ average income
$60,147

Whitney Street carries 74% more than the county average at its busiest, 315 of them trucks (7.8%, below the county-wide 21.3%).

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 80Motorway · #1 by traffic21,894vehicles6,524trucks · 29.8%
27th StreetPrimary road · #2 by traffic11,741vehicles704trucks · 6.0%
3650th StreetTrunk road · 3,982vehicles524trucks · 13.2%
Road class
Trunk road
Median trip time
43.0 min
Drivers’ median age
52.8 yrs
Drivers’ average income
$56,424

650th Street carries 72% more than the county average on its busiest stretch, where the median trip lasts 43.0 minutes.

4Southwest 7th StreetPrimary road · #3 by traffic4,974vehicles355trucks · 7.1%
5Poplar StreetPrimary road · #4 by traffic4,318vehicles340trucks · 7.9%
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

CassDepartment 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 Cass County

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

Need segment-level traffic data?

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