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Traffic heat map of Grant County, North Dakota: 106 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Railroad Avenue and ND 21

Grant County, North Dakota Traffic Counts

How busy are the roads of Grant County, North Dakota? We measure 106 road miles, divided into 434 segments, with multi-sourced, cross-verified mobile and sensor data. Its roads are the quietest of any county in North Dakota, at 457 vehicles a day on average. 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 Grant County, North Dakota

Traffic

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

vehicles per day457
Trucks

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

8.9%
Average travel time

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

46.7 min
Congestion ratio

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

3.4%
Drivers’ average age

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

58.9 yrs
Drivers’ average income

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

$52,842

A typical monitored road in Grant County, North Dakota sees 457 vehicles per day, while its 106 miles of monitored roads together handle 44,179 vehicle-miles traveled per day (≈16.1 million per year). About 1 in 11 vehicles is a truck, fewer than the 1 in 9 across North Dakota.

The quietest roads of any county in North Dakota

At 457 vehicles per day, the average monitored road in Grant carries 79% less traffic than the state average of 2,174, suggesting less demand on each road - quiet roads that suit freight movement more than drive-by retail. Network-wide, Grant accounts for about 0.3% of North Dakota's statewide total of vehicle-miles. At 457 vehicles per day, Grant posts the lowest average traffic volume in North Dakota.

Journey times run 26% higher than the state level, at 46.7 minutes on average. Its average travel time of 46.7 minutes is longer than 83% of counties in North Dakota.

The congestion ratio of 3.4% is 68% lower, pointing to smoother traffic flow than the state level - delays are rare enough to plan travel times almost to the minute.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

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

Grant County vs. North Dakota Traffic Comparison

Of the four measures, average daily traffic per road differs most: Grant County runs 79% below the North Dakota average. Its average travel time, by contrast, is 26% above.

MetricGrant CountyNorth Dakota averageDifference
Traffic4572,174-79.0%
Truck % (Total Traffic)8.9%11.1%-19.5%
Avg. Travel Time46.7 min37.0 min+26.2%

How Grant County compares

Grant County moves the least traffic of its nearby counties

Against the 4 nearest areas, Grant County moves 14.5% of the total daily travel and carries 63.3% less traffic on a typical road; it has the fourth busiest roads of the five. Quieter and more local than the areas around it on both counts: less traffic, and less of what there is arriving by truck.

Grant 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
Grant County4578.9%44,17946.7 min3.4%
Morton County, North Dakota2,56014.7%1,017,52931.7 min7.2%
Sioux County, North Dakota1,39913.5%81,62632.0 min5.3%
Corson County, South Dakota44720.4%55,43746.2 minN/A
Hettinger County, North Dakota5729.6%64,12946.3 min3.4%
North Dakota average2,17411.1%N/A37.0 min10.6%

Grant County ranked within North Dakota

Grant County posts the highest average driver age of any county-level area in North Dakota.

Grant County ranked among 53 county-level areas in North Dakota (1 = highest).
MeasureGrant CountyNorth Dakota rank
Traffic volume (AADT)457#53 of 53
Average travel time46.7 min#10 of 53
Average driver income$52,842#52 of 53
Average driver age58.9 yrs#1 of 53

Grant County ranks #1 of 53 on average driver age but #52 of 53 on average driver income. The driver population here skews older and lower-income than most of North Dakota.

Busiest roads in Grant County, North Dakota

Traffic concentrates on a few corridors: the three busiest roads average 728 vehicles a day, against 457 on the average road in Grant County.

Railroad Avenue leads with 1,105 vehicles a day, 109 of them trucks (9.8%). That is 78% more than the next road, ND 21 (621). It tops the truck ranking too, with the most trucks.

ND 31 carries longer journeys than most roads here, with a median trip of 79.7 minutes against 46.7 county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Railroad AvenueSecondary road · 1,105vehicles109trucks · 9.8%
Road class
Secondary road
Congestion ratio
3.6%
Median trip time
43.3 min
Drivers’ median age
57.8 yrs
Drivers’ average income
$54,626

Railroad Avenue peaks at 1,105 vehicles a day, 2.4 times the county average; trucks are 9.8% of it, above the county-wide 8.9%.

2ND 21Secondary road · 621vehicles45trucks · 7.2%
Road class
Secondary road
Congestion ratio
3.2%
Median trip time
40.5 min
Drivers’ median age
57.7 yrs
Drivers’ average income
$56,554

ND 21 carries 36% more than the county average at its busiest, 45 of them trucks (7.2%, below the county-wide 8.9%).

368th Avenue SouthwestSecondary road · 458vehicles37trucks · 8.0%
Road class
Secondary road
Median trip time
59.5 min
Drivers’ median age
58.4 yrs
Drivers’ average income
$54,216

68th Avenue Southwest is a quieter road: its busiest stretch carries about the same as the county average; trucks are 8.0% of it, below the county-wide 8.9%.

4ND 49Secondary road · 419vehicles37trucks · 8.9%
Road class
Secondary road
Median trip time
49.2 min
Drivers’ median age
61.2 yrs
Drivers’ average income
$50,357

Even at its busiest, ND 49 carries 8% less than the county average; trucks are 8.9% of it, in line with the county-wide 8.9%.

5ND 31Secondary road · 298vehicles40trucks · 13.3%
Road class
Secondary road
Median trip time
79.7 min

ND 31 is a quieter road: its busiest stretch carries 35% less than the county average; trucks are 13.3% of it, above the county-wide 8.9%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Railroad AvenueSecondary road · #1 by traffic1,105vehicles109trucks · 9.8%
2ND 21Secondary road · #2 by traffic621vehicles45trucks · 7.2%
3ND 31Secondary road · #5 by traffic298vehicles40trucks · 13.3%
4ND 49Secondary road · #4 by traffic419vehicles37trucks · 8.9%
568th Avenue SouthwestSecondary road · #3 by traffic458vehicles37trucks · 8.0%
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

GrantDepartment 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 Grant County

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

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