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Traffic heat map of Fall River County, South Dakota: 182 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Fall River Road

Fall River County, South Dakota Traffic Counts

Traffic analytics for Fall River County, South Dakota, calculated from real-world mobile and sensor networks on 959 road segments (182 road miles, about 1,004 ft each). Its busiest road, Fall River Road, carries 6,099 vehicles a day, 3.1 times the average road. Use the figures below to move from assumptions to certainty on retail locations, logistics and road planning.
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 Fall River County, South Dakota

Traffic

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

vehicles per day1,961
Trucks

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

12.0%
Average travel time

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

39.5 min
Drivers’ average age

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

57.8 yrs
Drivers’ average income

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

$68,124

A typical monitored road in Fall River County, South Dakota sees 1,961 vehicles per day, while its 182 miles of monitored roads together handle 254,579 vehicle-miles traveled per day (≈92.9 million per year). At 12.0%, the truck share runs above the 10.3% across South Dakota: about 1 in 8 vehicles.

Busier roads than 75% of counties in South Dakota

Fall River sees 38% lower average daily traffic volume than the state average (1,961 vehicles per day against 3,156), suggesting less demand on each road - less drive-by exposure for retail, but easier access for deliveries. In total volume terms, its road network carries about 1.0% of South Dakota's statewide total of vehicle-miles. By volume, Fall River's 1,961 vehicles per day outpaces 75% of counties in South Dakota.

Journey times run 22% higher than the state level, at 39.5 minutes on average. On travel time, Fall River runs longer than 63% of counties in South Dakota.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Fall River County, South Dakota

Trafficvehicles per day2,723
Trucks13.1%
Average travel time51.4 min
Drivers’ average age56.5 yrs
Drivers’ average income$67,909

Highways carry the vast majority of travel in Fall River County, South Dakota, 83% of all vehicle-miles. The average highway carries 2,723 vehicles per day, 97% more than the average non-highway road in the same area, which carries 1,383 vehicles per day.

Highways make up 68% of the monitored road miles (123 miles, 414 segments), so they carry more than their share: 212,339 vehicle-miles traveled per day (≈77.5 million per year).

By highway travel volume, Fall River outranks 60% of counties in South Dakota.

Fewer highway trucks than 73% of counties in South Dakota

At 13.1%, the highway truck share matches the state average for similar road classifications. The highway traffic mix is typical for South Dakota: neither freight- nor commuter-dominated.

By truck concentration, highways here trail 60% of counties in South Dakota. By raw truck volume, Fall River carries fewer highway trucks than 73% of counties in South Dakota.

non-highway traffic icon

Non-highway Traffic in Fall River County, South Dakota

Trafficvehicles per day1,383
Trucks6.5%
Average travel time30.4 min
Drivers’ average age60.6 yrs
Drivers’ average income$68,552

Local roads carry a smaller share of travel in Fall River County, South Dakota, 17% of vehicle-miles; most driving happens on highways. On the average non-highway road, that comes to 1,383 vehicles per day.

Spread over 59 miles and 545 segments, 32% of the road network, local roads carry a lighter load per mile: 42,240 vehicle-miles traveled per day (≈15.4 million per year). About 1 in 15 vehicles on non-highway roads is a truck (6.5%).

Older drivers than 98% of counties in South Dakota

The concentration of trucks on non-highway roads is 50% lower than on highways.

62% of counties in South Dakota see higher average driver income among trip origins than Fall River. The driver population here skews older than 98% of counties in South Dakota.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

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

Fall River County vs. South Dakota Traffic Comparison

The average daily traffic per road sets Fall River County apart: 38% below the South Dakota average. Its average travel time, by contrast, is 22% above.

MetricFall River CountySouth Dakota averageDifference
Traffic1,9613,156-37.8%
Truck % (Total Traffic)12.0%10.3%+16.8%
Truck % (Highway)13.1%13.6%-3.6%
Avg. Travel Time39.5 min32.5 min+21.5%

How Fall River County compares

Fall River County against nearby counties

Set against the average of the 4 areas nearest to it, Fall River County carries 40.6% more traffic on a typical road; it has the second busiest roads of the five. Bigger and busier at once: more road than the areas around it and heavier traffic on it, which makes it the centre of gravity for travel in this part of the map.

Fall River 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
Fall River County1,96112.0%254,57939.5 minN/A
Custer County, South Dakota2,6568.3%380,82727.2 minN/A
Dawes County, Nebraska1,35512.6%123,72937.2 minN/A
Sioux County, Nebraska20112.2%16,02643.1 minN/A
Niobrara County, Wyoming1,37014.8%113,38358.9 minN/A
South Dakota average3,15610.3%N/A32.5 min12.9%

Fall River County ranked within South Dakota

Fall River County sits in South Dakota's top three on average driver age.

Fall River 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.
MeasureFall River CountySouth Dakota rank
Traffic volume (AADT)1,961#17 of 66
Highway vehicle-miles per day212,339#20 of 49
Truck share on highways13.1%#30 of 49
Highway trucks per day356#36 of 49
Average travel time39.5 min#25 of 66
Average driver income$68,124#41 of 66
Average driver age57.8 yrs#2 of 66

Busiest roads in Fall River County, South Dakota

On their busiest stretches, the three busiest roads in Fall River County carry 5,931 vehicles a day on average, 3.0 times the typical road in the county (1,961).

Fall River Road leads with 6,099 vehicles a day, 690 of them trucks (11.3%). Chicago Street is practically level with it at 6,052. It tops the truck ranking too, with the most trucks.

SD Highway 79 carries longer journeys than most roads here, with a median trip of 57.0 minutes against 39.5 county-wide.

Few trucks use Chicago Street: 5.5% of its traffic, under half the county's 12.0%.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Fall River RoadTrunk road · 6,099vehicles690trucks · 11.3%
Road class
Trunk road
Median trip time
44.8 min
Drivers’ median age
57.2 yrs
Drivers’ average income
$66,707

Fall River Road carries 3.1 times the county average at its busiest, 690 of them trucks (11.3%, below the county-wide 12.0%).

2Chicago StreetPrimary road · 6,052vehicles330trucks · 5.5%
Road class
Primary road
Median trip time
28.4 min
Drivers’ median age
60.4 yrs
Drivers’ average income
$63,619

Trips on Chicago Street are short, a median 28.4 minutes against 39.5 county-wide, so it mostly serves local errands and commutes.

3River StreetPrimary road · 5,642vehicles353trucks · 6.3%
Road class
Primary road
Median trip time
31.1 min
Drivers’ median age
60.5 yrs
Drivers’ average income
$64,500

River Street carries 2.9 times the county average on its busiest stretch, where the median trip lasts 31.1 minutes.

4SD Highway 79Trunk road · 5,438vehicles609trucks · 11.2%
Road class
Trunk road
Median trip time
57.0 min
Drivers’ median age
54.1 yrs
Drivers’ average income
$71,389

At 2.8 times the county average, SD Highway 79 draws drivers from neighborhoods averaging $71,389 in household income.

5Jensen HighwayPrimary road · 4,968vehicles290trucks · 5.8%
Road class
Primary road
Median trip time
28.6 min
Drivers’ median age
60.0 yrs
Drivers’ average income
$63,103

The busiest stretch of Jensen Highway carries 2.5 times the county average; trucks are 5.8% of it, below the county-wide 12.0%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Fall River RoadTrunk road · #1 by traffic6,099vehicles690trucks · 11.3%
2SD Highway 79Trunk road · #4 by traffic5,438vehicles609trucks · 11.2%
3Indianapolis AvenueTrunk road · 3,561vehicles368trucks · 10.3%
Road class
Trunk road
Median trip time
51.2 min
Drivers’ median age
59.5 yrs
Drivers’ average income
$67,982

Indianapolis Avenue peaks at 3,561 vehicles a day, 82% more than the county average; trucks are 10.3% of it, below the county-wide 12.0%.

4US 385Trunk road · 2,921vehicles367trucks · 12.6%
Road class
Trunk road
Median trip time
52.8 min
Drivers’ median age
55.6 yrs
Drivers’ average income
$71,543

US 385 carries through traffic: the median trip using it lasts 52.8 minutes, against 39.5 for the county.

5River StreetPrimary road · #3 by traffic5,642vehicles353trucks · 6.3%
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

Fall RiverDepartment 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 Fall River County

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

Need segment-level traffic data?

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