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Traffic heat map of Lyon County, Iowa: 290 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Beech Avenue and 2nd Avenue

Lyon County, Iowa Traffic Counts

Our Lyon County, Iowa traffic data covers 1,880 road segments over 290 road miles, with an average segment of just 816 ft. Its busiest road, Beech Avenue, carries 5,318 vehicles a day, 4.0 times the average road. Whether you are evaluating a new retail location, planning routes or assessing infrastructure, these numbers replace guesswork.
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 Lyon County, Iowa

Traffic

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

vehicles per day1,345
Trucks

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

9.3%
Average travel time

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

37.6 min
Congestion ratio

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

6.5%
Drivers’ average age

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

47.0 yrs
Drivers’ average income

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

$79,577

Our data shows 1,345 vehicles per day on the average road in Lyon County, Iowa, and 355,016 vehicle-miles traveled per day (≈130 million per year) across its 290 miles of monitored roads. About 1 in 11 vehicles is a truck, fewer than the 1 in 9 across Iowa.

Longer trips than 83% of counties in Iowa

At 1,345 vehicles per day, the average monitored road in Lyon carries 56% less traffic than the state average of 3,042, suggesting less demand on each road - very light roads: easy truck access, but little passing trade for roadside retail. Network-wide, Lyon accounts for about 0.4% of Iowa's statewide total of vehicle-miles. Lyon carries less traffic than 73% of counties in Iowa.

At 37.6 minutes, the average travel time is 14% higher than the state level. Its average travel time of 37.6 minutes is longer than 83% of counties in Iowa.

At 43% lower than the state level, the 6.5% congestion ratio signals smoother traffic flow - fewer delays make delivery windows more reliable.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

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

Lyon County vs. Iowa Traffic Comparison

Of the four measures, average daily traffic per road differs most: Lyon County runs 56% below the Iowa average. Its truck share is also 16% below.

MetricLyon CountyIowa averageDifference
Traffic1,3453,042-55.8%
Truck % (Total Traffic)9.3%11.0%-15.5%
Avg. Travel Time37.6 min33.0 min+13.8%

How Lyon County compares

Lyon County against nearby counties

Set against the average of the 4 areas nearest to it, Lyon County carries 34.8% less traffic on a typical road and moves 46.4% of the total daily travel; it has the fourth busiest roads of the five. Smaller and quieter on both counts: a shorter network than the areas around it, carrying lighter traffic across it.

Lyon 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
Lyon County1,3459.3%355,01637.6 min6.5%
Sioux County, Iowa2,4289.1%808,31931.7 min9.7%
Rock County, Minnesota1,57913.8%561,57335.5 min5.8%
Lincoln County, South Dakota3,0899.3%1,425,50427.6 min11.5%
Osceola County, Iowa1,16011.1%262,85043.5 min5.3%
Iowa average3,04211.0%N/A33.0 min11.4%

Lyon County ranked within Iowa

Average travel time places Lyon County #18 of 99 in Iowa - the top quarter of the state.

Lyon County ranked among 99 county-level areas in Iowa (1 = highest).
MeasureLyon CountyIowa rank
Traffic volume (AADT)1,345#73 of 99
Average travel time37.6 min#18 of 99
Average driver income$79,577#25 of 99
Average driver age47.0 yrs#80 of 99

The two ends of this table sit far apart: #18 of 99 on average travel time, against #80 of 99 on average driver age.

Busiest roads in Lyon County, Iowa

The three busiest roads in Lyon County average 5,036 vehicles a day, 3.7 times the county average of 1,345 across all its monitored roads.

Beech Avenue is the busiest road, at 5,318 vehicles a day, 562 of them trucks (10.6%). It also carries the most trucks.

Trucks make up 37.0% of traffic on 484th Avenue, against 9.3% across all roads in the county.

Trips on 484th Avenue are short, a median of 22.5 minutes against 37.6 county-wide, so it serves mostly local traffic.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Beech AvenuePrimary road · 5,318vehicles562trucks · 10.6%
Road class
Primary road
Congestion ratio
12.2%
Median trip time
27.6 min
Drivers’ median age
47.4 yrs
Drivers’ average income
$94,059

Beech Avenue is a local road at heart: the median trip using it lasts 27.6 minutes, against 37.6 for the county.

22nd AvenuePrimary road · 4,913vehicles347trucks · 7.1%
Road class
Primary road
Congestion ratio
11.8%
Median trip time
37.4 min
Drivers’ median age
48.5 yrs
Drivers’ average income
$70,084

At 3.7 times the county average, 2nd Avenue draws drivers from neighborhoods averaging $70,084 in household income.

31st AvenuePrimary road · 4,875vehicles342trucks · 7.0%
Road class
Primary road
Congestion ratio
10.2%
Median trip time
38.8 min
Drivers’ median age
46.4 yrs
Drivers’ average income
$70,210

The busiest stretch of 1st Avenue carries 3.6 times the county average; trucks are 7.0% of it, below the county-wide 9.3%.

4IA 9Primary road · 4,328vehicles410trucks · 9.5%
Road class
Primary road
Congestion ratio
10.3%
Median trip time
37.4 min
Drivers’ median age
47.3 yrs
Drivers’ average income
$84,959

On its busiest stretch, IA 9 carries 3.2 times the county average; trucks are 9.5% of it, in line with the county-wide 9.3%.

5US 75Primary road · 4,285vehicles360trucks · 8.4%
Road class
Primary road
Congestion ratio
5.0%
Median trip time
49.6 min
Drivers’ median age
44.2 yrs
Drivers’ average income
$72,560

Drivers on US 75 are on long journeys, a median 49.6 minutes against 37.6 county-wide: a through route more than a local street.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Beech AvenuePrimary road · #1 by traffic5,318vehicles562trucks · 10.6%
2484th AvenueTertiary road · 1,480vehicles548trucks · 37.0%
Road class
Tertiary road
Congestion ratio
3.5%
Median trip time
22.5 min

484th Avenue carries 10% more than the county average at its busiest, 548 of them trucks (37.0%, above the county-wide 9.3%).

3SD Highway 42Primary road · 3,782vehicles454trucks · 12.0%
Road class
Primary road
Congestion ratio
9.0%
Median trip time
29.6 min
Drivers’ median age
49.7 yrs
Drivers’ average income
$98,436

SD Highway 42 peaks at 3,782 vehicles a day, 2.8 times the county average; trucks are 12.0% of it, above the county-wide 9.3%.

4IA 9Primary road · #4 by traffic4,328vehicles410trucks · 9.5%
5US 75Primary road · #5 by traffic4,285vehicles360trucks · 8.4%
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

LyonDepartment 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 Lyon County

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

Need segment-level traffic data?

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