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Traffic heat map of Foster County, North Dakota: 115 miles of roads shaded from blue (light) to red (heavy traffic), busiest on 4th Avenue and US 52

Foster County, North Dakota Traffic Counts

How busy are the roads of Foster County, North Dakota? We measure 115 road miles, divided into 681 segments, with multi-sourced, cross-verified mobile and sensor data. Its drivers come from neighborhoods among the top 5 counties in North Dakota for household income. The breakdown below covers volume, trucks, congestion and driver profiles for retailers, logistics planners and engineers.
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 Foster County, North Dakota

Traffic

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

vehicles per day1,094
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.

41.8 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.

53.1 yrs
Drivers’ average income

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

$92,189

The average monitored road in Foster County, North Dakota carries 1,094 vehicles per day. Across its 115 miles of monitored roads, that adds up to 96,660 vehicle-miles traveled per day (≈35.3 million per year). Trucks are 10.2% of traffic, close to the 11.1% across North Dakota.

Congestion 50% below the North Dakota average

At 1,094 vehicles per day, the average monitored road in Foster carries 50% less traffic than the state average of 2,174, suggesting less demand on each road - less drive-by exposure for retail, but easier access for deliveries. Across the whole network, that travel is about 0.6% of North Dakota's statewide total. 69% of counties in North Dakota see less traffic than Foster's 1,094 vehicles per day.

At 41.8 minutes, the average travel time is 13% higher than the state level. On travel time, Foster runs longer than 60% of counties in North Dakota.

At 50% lower than the state level, the 5.3% congestion ratio signals smoother traffic flow - delays are rare enough to plan travel times almost to the minute.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Foster County, North Dakota

Trafficvehicles per day2,945
Trucks11.7%
Average travel time43.0 min
Congestion ratio9.0%
Drivers’ average age53.1 yrs
Drivers’ average income$80,727

Highways carry about half of all travel in Foster County, North Dakota, 45% of vehicle-miles. The average highway carries 2,945 vehicles per day, 327% more than the average non-highway road in the same area, which carries 690 vehicles per day.

That comes from just 15% of the monitored road miles: 17 miles in 122 segments, carrying 43,703 vehicle-miles traveled per day (≈16.0 million per year).

Lower highway truck share than 97% of counties in North Dakota

At 11.7%, highway truck share is 19% lower than the state average. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.

By truck concentration, highways here trail 97% of counties in North Dakota. Foster's highway truck count is higher than 59% of counties in North Dakota, at roughly 345 trucks per day.

non-highway traffic icon

Non-highway Traffic in Foster County, North Dakota

Trafficvehicles per day690
Trucks8.9%
Average travel time41.6 min
Congestion ratio4.4%
Drivers’ average age53.2 yrs
Drivers’ average income$98,244

Local roads carry about half of all travel in Foster County, North Dakota, 55% of vehicle-miles. The average non-highway road carries 690 vehicles per day.

Local roads make up 85% of the monitored road miles (98 miles in 559 segments) but carry less than their share of travel: 52,957 vehicle-miles traveled per day (≈19.3 million per year). Trucks make up 8.9% of non-highway traffic, about 1 in 11 vehicles.

Drivers from higher-income areas than 92% of counties in North Dakota

Non-highway roads carry a truck concentration that's 24% lower than the highway network.

The non-highway congestion ratio of 4.4% is 59% lower than the state level, suggesting more efficient local mobility than the state average.

Trip origins here have higher average income than 92% of counties in North Dakota. Foster's median driver age is higher than 69% of counties in North Dakota.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 8:00 AM–9:00 AM and PM peak 12:00 PM–1:00 PM, with volumes reaching approximately 76% higher than the daily average.
Weekend traffic:
Weekends are much quieter: volumes run about 28% below weekday levels, the signature of a commute-driven road network.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
May–July is the high season, with volumes +16% versus the annual average.
Lowest month:
March is the quietest month, with volumes -20% versus the annual average.

Data Finding: Hourly & Seasonal Patterns

In Foster County, North Dakota, the peak hour concentrates about 7% of the day's traffic, and there is a strong seasonal swing of +16% in high season.

Foster County vs. North Dakota Traffic Comparison

Foster County's biggest difference from the North Dakota average is its average daily traffic per road, 50% below it. Its highway truck share is also 19% below.

MetricFoster CountyNorth Dakota averageDifference
Traffic1,0942,174-49.7%
Truck % (Total Traffic)10.2%11.1%-8.5%
Truck % (Highway)11.7%14.5%-19.2%
Avg. Travel Time41.8 min37.0 min+12.9%

How Foster County compares

Foster County against nearby counties

Against the 4 nearest areas, Foster County moves 48.4% of the total daily travel; it has the second busiest roads of the five. The same kind of road, just less of it: traffic per road matches the areas around it while the network itself is smaller.

Foster 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
Foster County1,09410.2%96,66041.8 min5.3%
Eddy County, North Dakota66411.4%42,82248.7 min3.6%
Griggs County, North Dakota5849.2%50,66442.4 min3.2%
Wells County, North Dakota94813.2%143,21335.7 min4.0%
Stutsman County, North Dakota1,86214.0%562,74237.2 min8.3%
North Dakota average2,17411.1%N/A37.0 min10.6%

Foster County ranked within North Dakota

Truck share on highways places Foster County #34 of 35 in North Dakota - the bottom quarter of the state.

Foster County ranked among 53 county-level areas in North Dakota (1 = highest); measures without data in every county rank a smaller field, down to 35.
MeasureFoster CountyNorth Dakota rank
Traffic volume (AADT)1,094#17 of 53
Highway vehicle-miles per day43,703#26 of 35
Truck share on highways11.7%#34 of 35
Highway trucks per day345#15 of 35
Average travel time41.8 min#22 of 53
Average driver income$92,189#5 of 53
Average driver age53.1 yrs#17 of 53

The two ends of this table sit far apart: #5 of 53 on average driver income, against #34 of 35 on truck share on highways.

Busiest roads in Foster County, North Dakota

On their busiest stretches, the three busiest roads in Foster County carry 3,351 vehicles a day on average, 3.1 times the typical road in the county (1,094).

4th Avenue leads with 4,886 vehicles a day, 365 of them trucks (7.5%). That is 84% more than the next road, US 52 (2,651). It also carries the most trucks.

Main Street is a local road at heart: the median trip using it lasts 26.6 minutes, against 41.8 for the county.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
14th AvenueTrunk road · 4,886vehicles365trucks · 7.5%
Road class
Trunk road
Congestion ratio
14.4%
Median trip time
41.6 min
Drivers’ median age
53.2 yrs
Drivers’ average income
$81,038

On its busiest stretch, 4th Avenue carries 4.5 times the county average; trucks are 7.5% of it, below the county-wide 10.2%.

2US 52Trunk road · 2,651vehicles337trucks · 12.7%
Road class
Trunk road
Congestion ratio
6.4%
Median trip time
48.1 min
Drivers’ median age
53.0 yrs
Drivers’ average income
$83,674

US 52 peaks at 2,651 vehicles a day, 2.4 times the county average; trucks are 12.7% of it, above the county-wide 10.2%.

3ND 52/200 NortheastTrunk road · 2,516vehicles213trucks · 8.5%
Road class
Trunk road
Congestion ratio
6.8%
Median trip time
44.5 min
Drivers’ median age
53.2 yrs
Drivers’ average income
$80,524

ND 52/200 Northeast carries 2.3 times the county average at its busiest, 213 of them trucks (8.5%, below the county-wide 10.2%).

4ND 281 NortheastPrimary road · 1,942vehicles189trucks · 9.7%
Road class
Primary road
Congestion ratio
5.1%
Median trip time
40.9 min
Drivers’ median age
53.2 yrs
Drivers’ average income
$83,221

ND 281 Northeast peaks at 1,942 vehicles a day, 77% more than the county average; trucks are 9.7% of it, in line with the county-wide 10.2%.

5Main StreetTertiary road · 741vehicles48trucks · 6.5%
Road class
Tertiary road
Congestion ratio
4.2%
Median trip time
26.6 min
Drivers’ median age
52.4 yrs
Drivers’ average income
$73,943

Even at its busiest, Main Street carries 32% less than the county average; trucks are 6.5% of it, below the county-wide 10.2%.

Ranked by trucks per day

Cars and light vehiclesTrucks
14th AvenueTrunk road · #1 by traffic4,886vehicles365trucks · 7.5%
2US 52Trunk road · #2 by traffic2,651vehicles337trucks · 12.7%
3ND 52/200 NortheastTrunk road · #3 by traffic2,516vehicles213trucks · 8.5%
4ND 281 NortheastPrimary road · #4 by traffic1,942vehicles189trucks · 9.7%
5ND 200Primary road · 707vehicles57trucks · 8.1%
Road class
Primary road
Congestion ratio
3.1%
Median trip time
46.3 min
Drivers’ median age
53.8 yrs
Drivers’ average income
$107,687

ND 200 is a quieter road: its busiest stretch carries 35% less than the county average; trucks are 8.1% of it, below the county-wide 10.2%.

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

FosterDepartment 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 Foster County

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

Need segment-level traffic data?

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