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Traffic heat map of Lake County, South Dakota: 172 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Washington Avenue

Lake County, South Dakota Traffic Counts

Our Lake County, South Dakota traffic data covers 1,416 road segments over 172 road miles, with an average segment of just 640 ft. Its drivers come from neighborhoods among the top 5 counties in South Dakota for household income. 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 Lake County, South Dakota

Traffic

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

vehicles per day1,728
Trucks

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

7.4%
Average travel time

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

30.2 min
Drivers’ average age

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

50.7 yrs
Drivers’ average income

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

$84,966

A typical monitored road in Lake County, South Dakota sees 1,728 vehicles per day, while its 172 miles of monitored roads together handle 188,128 vehicle-miles traveled per day (≈68.7 million per year). About 1 in 13 vehicles is a truck, fewer than the 1 in 10 across South Dakota.

Shorter trips than 89% of counties in South Dakota

At 1,728 vehicles per day, the average monitored road in Lake carries 45% less traffic than the state average of 3,156, suggesting less demand on each road - lighter roads for freight, but less passing trade for roadside retail. In total volume terms, its road network carries about 0.8% of South Dakota's statewide total of vehicle-miles. Lake carries more traffic than 72% of counties in South Dakota.

The average trip takes 30.2 minutes, 7% lower than the state level. Its average travel time of 30.2 minutes is shorter than 89% of counties in South Dakota.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

In Lake County, South Dakota, the peak hour concentrates about 7% of the day's traffic.

Lake County vs. South Dakota Traffic Comparison

Of the four measures, average daily traffic per road differs most: Lake County runs 45% below the South Dakota average. Its truck share is also 28% below.

MetricLake CountySouth Dakota averageDifference
Traffic1,7283,156-45.3%
Truck % (Total Traffic)7.4%10.3%-27.6%
Avg. Travel Time30.2 min32.5 min-6.9%

How Lake County compares

Lake County against nearby counties

Set against the average of the 4 areas nearest to it, Lake County moves 15.5% of the total daily travel and sees 20.6% shorter typical trips; it has the second busiest roads of the five. It is the quiet one of the group - below the areas around it on volume, total travel and trip length alike.

Lake County and the 4 nearest county-level areas by centroid distance, with the South Dakota average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Lake County1,7287.4%188,12830.2 minN/A
Moody County, South Dakota97212.5%405,36637.6 minN/A
Miner County, South Dakota73110.8%59,73648.7 minN/A
McCook County, South Dakota1,00413.9%496,44634.6 minN/A
Minnehaha County, South Dakota5,9657.7%3,884,83431.4 min13.4%
South Dakota average3,15610.3%N/A32.5 min12.9%

Lake County ranked within South Dakota

Lake County sits in the top quarter of the South Dakota field on average driver income, at #4 of 66.

Lake County ranked among 66 county-level areas in South Dakota (1 = highest).
MeasureLake CountySouth Dakota rank
Traffic volume (AADT)1,728#19 of 66
Average travel time30.2 min#59 of 66
Average driver income$84,966#4 of 66
Average driver age50.7 yrs#25 of 66

Lake County ranks #4 of 66 on average driver income but #59 of 66 on average travel time - the two describe the same roads and are worth reading together rather than either on its own.

Busiest roads in Lake County, South Dakota

On their busiest stretches, the three busiest roads in Lake County carry 6,927 vehicles a day on average, 4.0 times the typical road in the county (1,728).

Washington Avenue is the busiest road, at 7,310 vehicles a day, 384 of them trucks (5.2%). Northeast 2nd Street is practically level with it at 7,158. Southeast 10th Street carries the most trucks, 388 a day (6.2% of its traffic), although it ranks #3 for all traffic.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Washington AvenuePrimary road · 7,310vehicles384trucks · 5.2%
Road class
Primary road
Median trip time
28.4 min
Drivers’ median age
50.7 yrs
Drivers’ average income
$74,898

Washington Avenue peaks at 7,310 vehicles a day, 4.2 times the county average; trucks are 5.2% of it, below the county-wide 7.4%.

2Northeast 2nd StreetPrimary road · 7,158vehicles297trucks · 4.2%
Road class
Primary road
Median trip time
26.8 min
Drivers’ median age
50.9 yrs
Drivers’ average income
$75,890

Northeast 2nd Street carries 4.1 times the county average at its busiest, 297 of them trucks (4.2%, below the county-wide 7.4%).

3Southeast 10th StreetPrimary road · 6,312vehicles388trucks · 6.2%
Road class
Primary road
Median trip time
32.6 min
Drivers’ median age
49.3 yrs
Drivers’ average income
$83,907

Southeast 10th Street carries 3.7 times the county average on its busiest stretch, where the median trip lasts 32.6 minutes.

4Northwest 2nd StreetPrimary road · 5,638vehicles308trucks · 5.5%
Road class
Primary road
Median trip time
29.1 min
Drivers’ median age
51.0 yrs
Drivers’ average income
$78,472

At 3.3 times the county average, Northwest 2nd Street draws drivers from neighborhoods averaging $78,472 in household income.

5SD Highway 34Primary road · 3,726vehicles336trucks · 9.0%
Road class
Primary road
Median trip time
36.4 min
Drivers’ median age
50.1 yrs
Drivers’ average income
$87,393

The busiest stretch of SD Highway 34 carries 2.2 times the county average; trucks are 9.0% of it, above the county-wide 7.4%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Southeast 10th StreetPrimary road · #3 by traffic6,312vehicles388trucks · 6.2%
2Washington AvenuePrimary road · #1 by traffic7,310vehicles384trucks · 5.2%
3SD Highway 34Primary road · #5 by traffic3,726vehicles336trucks · 9.0%
4Northwest 2nd StreetPrimary road · #4 by traffic5,638vehicles308trucks · 5.5%
5Northeast 2nd StreetPrimary road · #2 by traffic7,158vehicles297trucks · 4.2%
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

LakeDepartment 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 Lake County

The same traffic breakdown for the areas closest to Lake County, South Dakota.

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