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Traffic heat map of Hamlin County, South Dakota: 162 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 29 and US 81

Hamlin County, South Dakota Traffic Counts

Its busiest road, I 29, carries 6,175 vehicles a day, 6.1 times the average road. This page breaks down traffic in Hamlin County, South Dakota across 162 miles of monitored roads split into 694 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 Hamlin County, South Dakota

Traffic

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

vehicles per day1,017
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.

34.6 min
Drivers’ average age

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

46.8 yrs
Drivers’ average income

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

$78,253

The average monitored road in Hamlin County, South Dakota carries 1,017 vehicles per day. Across its 162 miles of monitored roads, that adds up to 198,306 vehicle-miles traveled per day (≈72.4 million per year). Trucks are 10.2% of traffic, close to the 10.3% across South Dakota.

Traffic 68% below the South Dakota average

Hamlin's average daily traffic volume is 68% lower than the state average - 1,017 vehicles per day against 3,156 - suggesting less traffic load per road - quiet roads that suit freight movement more than drive-by retail. Network-wide, Hamlin accounts for about 0.8% of South Dakota's statewide total of vehicle-miles. By volume, Hamlin's 1,017 vehicles per day trails 55% of counties in South Dakota.

Journey times run 7% higher than the state level, at 34.6 minutes on average. 62% of counties in South Dakota have a longer average travel time than Hamlin's 34.6 minutes.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Hamlin County, South Dakota

Trafficvehicles per day3,325
Trucks15.7%
Average travel time46.2 min
Drivers’ average age48.6 yrs
Drivers’ average income$72,281

Highways carry a smaller share of travel in Hamlin County, South Dakota, 29% of vehicle-miles; most driving happens on local roads. The average highway carries 3,325 vehicles per day, 246% more than the average non-highway road in the same area, which carries 962 vehicles per day.

Yet highways are only 9% of the road network, 15 miles in 16 segments, so each mile of them is 3.1 times as busy as the average road mile.

Higher highway truck share than 73% of counties in South Dakota

Highway truck concentration here runs 15% higher than the state average, at 15.7%. Highways here lean toward freight, so highway access is a real asset for logistics operators.

By truck concentration, highways here outrank 73% of counties in South Dakota. By raw truck volume, Hamlin carries more highway trucks than 71% of counties in South Dakota.

non-highway traffic icon

Non-highway Traffic in Hamlin County, South Dakota

Trafficvehicles per day962
Trucks8.0%
Average travel time34.4 min
Drivers’ average age46.0 yrs
Drivers’ average income$79,584

Local roads carry most of the traffic in Hamlin County, South Dakota: 71% of all vehicle-miles. A typical local road sees 962 vehicles per day.

Local roads make up 91% of the monitored road miles (147 miles in 678 segments) but carry less than their share of travel: 140,628 vehicle-miles traveled per day (≈51.3 million per year). Trucks make up 8.0% of non-highway traffic, about 1 in 12 vehicles.

Drivers from higher-income areas than 83% of counties in South Dakota

Compared to highways, non-highway routes see 49% fewer trucks by share.

Hamlin's average driver income is higher than 83% of counties in South Dakota. The driver population here skews younger than 78% of counties in South Dakota.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

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

Hamlin County vs. South Dakota Traffic Comparison

Hamlin County's biggest difference from the South Dakota average is its average daily traffic per road, 68% below it. Its highway truck share, by contrast, is 15% above.

MetricHamlin CountySouth Dakota averageDifference
Traffic1,0173,156-67.8%
Truck % (Total Traffic)10.2%10.3%-0.4%
Truck % (Highway)15.7%13.6%+15.5%
Avg. Travel Time34.6 min32.5 min+6.7%

How Hamlin County compares

Hamlin County has the quietest roads among its nearby counties

Compared with its 4 closest neighbours, Hamlin County carries 62.9% less traffic on a typical road and moves 37.3% of the total daily travel; it has the quietest roads of the five. Smaller and quieter on both counts: a shorter network than the areas around it, carrying lighter traffic across it.

Hamlin 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
Hamlin County1,01710.2%198,30634.6 minN/A
Brookings County, South Dakota3,2229.1%835,61133.5 minN/A
Deuel County, South Dakota1,15212.6%266,51941.0 minN/A
Kingsbury County, South Dakota1,43313.2%166,83650.1 minN/A
Codington County, South Dakota5,1667.5%858,24433.9 minN/A
South Dakota average3,15610.3%N/A32.5 min12.9%

Hamlin County ranked within South Dakota

Hamlin County sits in the top quarter of the South Dakota field on average driver income, at #12 of 66.

Hamlin County ranked among 66 county-level areas in South Dakota (1 = highest); measures without data in every county rank a smaller field, down to 49.
MeasureHamlin CountySouth Dakota rank
Traffic volume (AADT)1,017#37 of 66
Highway vehicle-miles per day57,677#39 of 49
Truck share on highways15.7%#14 of 49
Highway trucks per day521#15 of 49
Average travel time34.6 min#41 of 66
Average driver income$78,253#12 of 66
Average driver age46.8 yrs#52 of 66

The two ends of this table sit far apart: #12 of 66 on average driver income, against #39 of 49 on highway travel volume.

Busiest roads in Hamlin County, South Dakota

Traffic concentrates on a few corridors: the three busiest roads average 4,350 vehicles a day, against 1,017 on the average road in Hamlin County.

I 29 leads with 6,175 vehicles a day, 968 of them trucks (15.7%). That is 74% more than the next road, US 81 (3,539). It tops the truck ranking too, with the most trucks.

I 29 carries longer journeys than most roads here, with a median trip of 46.2 minutes against 34.6 county-wide.

Trucks make up 15.7% of traffic on I 29, against 10.2% across all roads in the county.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 29Motorway · 6,175vehicles968trucks · 15.7%
Road class
Motorway
Median trip time
46.2 min
Drivers’ median age
48.6 yrs
Drivers’ average income
$72,281

I 29 carries 6.1 times the county average on its busiest stretch, where the median trip lasts 46.2 minutes.

2US 81Primary road · 3,539vehicles317trucks · 8.9%
Road class
Primary road
Median trip time
38.7 min
Drivers’ median age
46.9 yrs
Drivers’ average income
$78,237

US 81 carries 3.5 times the county average on its busiest stretch, where the median trip lasts 38.7 minutes.

3455th AvenuePrimary road · 3,336vehicles287trucks · 8.6%
Road class
Primary road
Median trip time
38.1 min
Drivers’ median age
45.9 yrs
Drivers’ average income
$78,000

At 3.3 times the county average, 455th Avenue draws drivers from neighborhoods averaging $78,000 in household income.

4454th AvenuePrimary road · 3,104vehicles257trucks · 8.3%
Road class
Primary road
Median trip time
36.1 min
Drivers’ median age
46.8 yrs
Drivers’ average income
$77,740

The busiest stretch of 454th Avenue carries 3.1 times the county average; trucks are 8.3% of it, below the county-wide 10.2%.

5Dakota Highway 28Secondary road · 2,448vehicles237trucks · 9.7%
Road class
Secondary road
Median trip time
26.2 min
Drivers’ median age
46.5 yrs
Drivers’ average income
$79,095

On its busiest stretch, Dakota Highway 28 carries 2.4 times the county average; trucks are 9.7% of it, below the county-wide 10.2%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 29Motorway · #1 by traffic6,175vehicles968trucks · 15.7%
2US 81Primary road · #2 by traffic3,539vehicles317trucks · 8.9%
3455th AvenuePrimary road · #3 by traffic3,336vehicles287trucks · 8.6%
4454th AvenuePrimary road · #4 by traffic3,104vehicles257trucks · 8.3%
5Dakota Highway 28Secondary road · #5 by traffic2,448vehicles237trucks · 9.7%
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

HamlinDepartment 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 Hamlin County

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

Need segment-level traffic data?

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