Need segment-level traffic data?

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

Get insights →
Home
United States
South DakotaDewey
traffic map

Dewey County, South Dakota Traffic Counts

This page delivers traffic analytics for Dewey County, South Dakota. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Dewey County, South Dakota among 177 road miles divided in 506 segments. Our metrics go beyond simple volume counts to provide actionable insights on traffic intensity, congestion, commercial vehicle flow, and network performance with highest possible granularity (average segment length is 1,852 ft). Whether you are evaluating a new retail location, planning logistics routes, or assessing infrastructure needs, this data helps you move from assumptions to certainty.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
Find my place
total traffic icon

Total Traffic Volume & Performance

Traffic

Traffic

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

863

Trucks

Trucks

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

13.1%

Average travel time

Average travel time

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

39.8 min

Drivers’ average age

Drivers’ average age

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

41.0 yrs

Drivers’ average income

Drivers’ average income

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

$54,947

Our data indicates an estimated average traffic volume of 863 vehicles per day in Dewey County, South Dakota that results in 59,014 vehicle-miles traveled per day (≈21.5 million per year). The traffic stream is comprised of an average of 1 truck for every 8 vehicles. Typical time spent behind the wheel per trip is 39.8 minutes, which already accounts for delays at signals, intersections, and congestion.

Analytical insight

When compared to the South Dakota state averages: Dewey sees 73% lower average daily traffic volume than the state average (863 vehicles per day against 3,156), suggesting less demand on each road - a critical factor for logistics and site planning. In total volume terms, its road network carries 59,014 vehicle-miles traveled per day (≈21.5 million per year), about 0.2% of South Dakota's statewide total. Journey times run 23% higher than the state level, at 39.8 minutes on average. Dewey carries more traffic than 34% of counties in South Dakota. Its average travel time of 39.8 minutes is longer than 66% of counties in South Dakota.

Highway vs. Non-Highway Traffic Analysis

Analytical insight

N/A
non-highway traffic icon

Non-highway traffic

Traffic

Traffic

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

863

Trucks

Trucks

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

13.1%

Average travel time

Average travel time

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

39.8 min

Drivers’ average age

Drivers’ average age

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

41.0 yrs

Drivers’ average income

Drivers’ average income

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

$54,947

The non-highway road network in Dewey County, South Dakota supports a substantial volume of traffic. The average non-highway road carries 863 vehicles per day. That average covers 177 non-highway road miles divided in 506 segments (average segment length 1,852 ft), together carrying 59,014 vehicle-miles traveled per day (≈21.5 million per year). Trucks constitute 13.1% of non-highway traffic.

Analytical insight

66% of counties in South Dakota see shorter overall travel times than Dewey. Trip origins here have higher average income than 5% of counties in South Dakota. The driver population here skews older than 6% of counties in South Dakota.

Time-of-Day & Seasonal Patterns

Analytical insight

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

Traffic Flow Profile Comparison

Metric

Dewey

South Dakota
Average

Difference

Traffic

863

3,156

-72.7%

Truck % (Total Traffic)

13.1%

10.3%

+27.3%

Truck % (Highway)

13.6%

Avg. Travel Time

39.8 min

32.5 min

+22.6%

How Dewey County compares

Dewey County against nearby areas

Dewey County tracks the 4 areas around it closely - no measure in this table sets it far apart from the areas immediately next to it, though it has the second busiest roads of the five.

Dewey 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
Dewey County86313.1%59,01439.8 minN/A
Ziebach County, South Dakota49513.2%37,66253.0 minN/A
Stanley County, South Dakota2,32312.2%159,78440.2 minN/A
Sully County, South Dakota69713.4%50,79135.8 minN/A
Potter County, South Dakota63112.4%62,43835.0 minN/A
South Dakota average3,15610.3%N/A32.5 min12.9%

Dewey County ranked within South Dakota

Average driver income places Dewey County #63 of 66 in South Dakota - the bottom quarter of the state.

Where Dewey County sits among South Dakota's county-level areas on each measure. Rank 1 is the highest value in the state, whether or not that is the outcome you want; the field size differs by measure because not every county carries highway data.
MeasureDewey CountySouth Dakota rank
Traffic volume (AADT)863#44 of 66
Average travel time39.8 min#23 of 66
Average driver income$54,947#63 of 66
Average driver age41.0 yrs#62 of 66

Dewey County ranks #23 of 66 on average travel time but #63 of 66 on average driver income - the two describe the same roads and are worth reading together rather than either on its own.

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

South DakotaDepartment of Transportation

Historical traffic pattern databases

U.S. Census Bureau
All metrics represent estimates based on statistical modeling and are intended for strategic planning purposes.
TrafficZoom methodology
link arrow icon
Data current as of:
Q3 2026

Explore further

TrafficZoom platform

— street-level analytics and custom corridor reports.

Map AI

— demographics, housing and mobility data.

Counties near Dewey County

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

Need segment-level traffic data?

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

Get access now
Get a demo
Ticon websiteC-Site website
© 2026 TICON. All rights reserved.