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Traffic heat map of Sioux County, North Dakota: 87 miles of roads shaded from blue (light) to red (heavy traffic), busiest on 92nd Street and ND 1806

Sioux County, North Dakota Traffic Counts

TrafficZoom tracks traffic on 87 road miles in Sioux County, North Dakota, divided into 360 segments averaging 1,282 ft. Its drivers come from the lowest-income neighborhoods of any county in North Dakota, averaging $39,696. Built from cross-verified mobile and road-sensor data, these counts help you size up a retail site, plan logistics routes or assess infrastructure needs.
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 Sioux County, North Dakota

Traffic

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

vehicles per day1,399
Trucks

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

13.5%
Average travel time

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

32.0 min
Congestion ratio

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

5.3%
Drivers’ average age

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

41.5 yrs
Drivers’ average income

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

$39,696

A typical monitored road in Sioux County, North Dakota sees 1,399 vehicles per day, while its 87 miles of monitored roads together handle 81,626 vehicle-miles traveled per day (≈29.8 million per year). Trucks are 13.5% of traffic, more than the 11.1% across North Dakota.

Shorter trips than 87% of counties in North Dakota

Sioux sees 36% lower average daily traffic volume than the state average (1,399 vehicles per day against 2,174), suggesting less demand on each road - less drive-by exposure for retail, but easier access for deliveries. Network-wide, Sioux accounts for about 0.5% of North Dakota's statewide total of vehicle-miles. By volume, Sioux's 1,399 vehicles per day outpaces 75% of counties in North Dakota.

The average trip takes 32.0 minutes, 14% lower than the state level. On travel time, Sioux runs shorter than 87% of counties in North Dakota.

The congestion ratio of 5.3% is 50% lower, pointing to smoother traffic flow than the state level - free-flowing roads make scheduled deliveries highly predictable.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

In Sioux County, North Dakota, the peak hour concentrates about 8% of the day's traffic.

Sioux County vs. North Dakota Traffic Comparison

Of the four measures, average daily traffic per road differs most: Sioux County runs 36% below the North Dakota average. Its truck share, by contrast, is 22% above.

MetricSioux CountyNorth Dakota averageDifference
Traffic1,3992,174-35.6%
Truck % (Total Traffic)13.5%11.1%+21.6%
Avg. Travel Time32.0 min37.0 min-13.5%

How Sioux County compares

Sioux County against nearby counties

Set against the average of the 4 areas nearest to it, Sioux County moves 26.9% of the total daily travel and sees 25.3% shorter typical trips; it has the second busiest roads of the five. The mirror image of a big network: fewer road-miles carrying heavier traffic, so the travel here is concentrated rather than spread out.

Sioux County and the 4 nearest county-level areas by centroid distance, with the North Dakota average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Sioux County1,39913.5%81,62632.0 min5.3%
Emmons County, North Dakota69113.5%97,77047.0 min3.1%
Morton County, North Dakota2,56014.7%1,017,52931.7 min7.2%
Grant County, North Dakota4578.9%44,17946.7 min3.4%
Corson County, South Dakota44720.4%55,43746.2 minN/A
North Dakota average2,17411.1%N/A37.0 min10.6%

Sioux County ranked within North Dakota

No county-level area in North Dakota records a lower average driver income than Sioux County.

Sioux County ranked among 53 county-level areas in North Dakota (1 = highest).
MeasureSioux CountyNorth Dakota rank
Traffic volume (AADT)1,399#14 of 53
Average travel time32.0 min#46 of 53
Average driver income$39,696#53 of 53
Average driver age41.5 yrs#49 of 53

Sioux County ranks #14 of 53 on average daily traffic volume but #53 of 53 on average driver income - the two describe the same roads and are worth reading together rather than either on its own.

Busiest roads in Sioux County, North Dakota

Traffic concentrates on a few corridors: the three busiest roads average 2,600 vehicles a day, against 1,399 on the average road in Sioux County.

92nd Street is the busiest road, at 4,590 vehicles a day, 559 of them trucks (12.2%). No other road comes close: ND 1806, in second place, carries 1,611. It tops the truck ranking too, with the most trucks.

Freight stands out on ND 31: trucks are 58.0% of the traffic there, against 13.5% county-wide.

ND 31 carries longer journeys than most roads here, with a median trip of 79.6 minutes against 32.0 county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
192nd StreetTertiary road · 4,590vehicles559trucks · 12.2%
Road class
Tertiary road
Congestion ratio
9.3%
Median trip time
34.8 min
Drivers’ median age
41.7 yrs
Drivers’ average income
$45,081

The busiest stretch of 92nd Street carries 3.3 times the county average; trucks are 12.2% of it, below the county-wide 13.5%.

2ND 1806Primary road · 1,611vehicles193trucks · 12.0%
Road class
Primary road
Congestion ratio
3.7%
Median trip time
27.2 min
Drivers’ median age
41.5 yrs
Drivers’ average income
$31,089

ND 1806 carries 15% more than the county average on its busiest stretch, where the median trip lasts 27.2 minutes.

3ND 24Primary road · 1,599vehicles212trucks · 13.3%
Road class
Primary road
Congestion ratio
4.7%
Median trip time
30.4 min
Drivers’ median age
41.1 yrs
Drivers’ average income
$33,940

At 14% more than the county average, ND 24 draws drivers from neighborhoods averaging $33,940 in household income.

4ND 6Primary road · 820vehicles114trucks · 14.0%
Road class
Primary road
Median trip time
50.6 min

Drivers on ND 6 are on long journeys, a median 50.6 minutes against 32.0 county-wide: a through route more than a local street.

5ND 49Secondary road · 346vehicles38trucks · 11.1%
Road class
Secondary road
Median trip time
25.1 min

Even at its busiest, ND 49 carries 75% less than the county average; trucks are 11.1% of it, below the county-wide 13.5%.

Ranked by trucks per day

Cars and light vehiclesTrucks
192nd StreetTertiary road · #1 by traffic4,590vehicles559trucks · 12.2%
2ND 24Primary road · #3 by traffic1,599vehicles212trucks · 13.3%
3ND 1806Primary road · #2 by traffic1,611vehicles193trucks · 12.0%
4ND 31Secondary road · 244vehicles141trucks · 58.0%
Road class
Secondary road
Median trip time
79.6 min

ND 31 is a quieter road: its busiest stretch carries 83% less than the county average; trucks are 58.0% of it, above the county-wide 13.5%.

5ND 6Primary road · #4 by traffic820vehicles114trucks · 14.0%
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

SiouxDepartment 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 Sioux County

The same traffic breakdown for the areas closest to Sioux County, North Dakota.

Need segment-level traffic data?

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