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Traffic heat map of Mercer County, North Dakota: 199 miles of roads shaded from blue (light) to red (heavy traffic), busiest on ND 200 and ND 49

Mercer County, North Dakota Traffic Counts

How busy are the roads of Mercer County, North Dakota? We measure 199 road miles, divided into 1,212 segments, with multi-sourced, cross-verified mobile and sensor data. The average road here carries 1,102 vehicles a day, 49% less than the North Dakota average of 2,174. 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 Mercer County, North Dakota

Traffic

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

vehicles per day1,102
Trucks

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

10.9%
Average travel time

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

30.4 min
Congestion ratio

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

4.7%
Drivers’ average age

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

53.0 yrs
Drivers’ average income

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

$84,803

Our data shows 1,102 vehicles per day on the average road in Mercer County, North Dakota, and 183,250 vehicle-miles traveled per day (≈66.9 million per year) across its 199 miles of monitored roads. Trucks are 10.9% of traffic, close to the 11.1% across North Dakota.

Shorter trips than 90% of counties in North Dakota

At 1,102 vehicles per day, the average monitored road in Mercer carries 49% 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. In total volume terms, its road network carries about 1.0% of North Dakota's statewide total of vehicle-miles. By volume, Mercer's 1,102 vehicles per day outpaces 71% of counties in North Dakota.

Journey times run 18% lower than the state level, at 30.4 minutes on average. 90% of counties in North Dakota have a longer average travel time than Mercer's 30.4 minutes.

At 56% lower than the state level, the 4.7% congestion ratio signals smoother traffic flow - free-flowing roads make scheduled deliveries highly predictable.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 10:00 AM–12:00 PM and a long afternoon plateau from 3:00 PM to 7:00 PM, with volumes reaching approximately 80% higher than the daily average.
Weekend traffic:
Weekends are much quieter: volumes run about 24% below weekday levels, the signature of a commute-driven road network.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +20% versus the annual average.
Lowest month:
March is the quietest month, with volumes -23% versus the annual average.

Data Finding: Hourly & Seasonal Patterns

In Mercer County, North Dakota, the peak hour concentrates about 7% of the day's traffic, and there is a strong seasonal swing of +20% in high season.

Mercer County vs. North Dakota Traffic Comparison

Of the four measures, average daily traffic per road differs most: Mercer County runs 49% below the North Dakota average. Its average travel time is also 18% below.

MetricMercer CountyNorth Dakota averageDifference
Traffic1,1022,174-49.3%
Truck % (Total Traffic)10.9%11.1%-1.3%
Avg. Travel Time30.4 min37.0 min-17.9%

How Mercer County compares

Mercer County against nearby counties

Set against the average of the 4 areas nearest to it, Mercer County sees 27.4% shorter typical trips and moves 39.8% of the total daily travel; it has the third busiest roads of the five. It is the quiet one of the group - below the areas around it on volume, total travel and trip length alike.

Mercer 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
Mercer County1,10210.9%183,25030.4 min4.7%
Oliver County, North Dakota83810.1%76,66241.4 min3.3%
McLean County, North Dakota73211.5%348,03845.1 min3.2%
Dunn County, North Dakota2,04516.7%399,85749.3 min7.7%
Morton County, North Dakota2,56014.7%1,017,52931.7 min7.2%
North Dakota average2,17411.1%N/A37.0 min10.6%

Mercer County ranked within North Dakota

Average travel time places Mercer County #48 of 53 in North Dakota - the bottom quarter of the state.

Mercer County ranked among 53 county-level areas in North Dakota (1 = highest).
MeasureMercer CountyNorth Dakota rank
Traffic volume (AADT)1,102#16 of 53
Average travel time30.4 min#48 of 53
Average driver income$84,803#16 of 53
Average driver age53.0 yrs#18 of 53

Mercer County ranks #16 of 53 on average daily traffic volume but #48 of 53 on average travel time - the two describe the same roads and are worth reading together rather than either on its own.

Busiest roads in Mercer County, North Dakota

Traffic concentrates on a few corridors: the three busiest roads average 2,065 vehicles a day, against 1,102 on the average road in Mercer County.

ND 200 is the busiest road, at 2,600 vehicles a day, 253 of them trucks (9.7%). It also carries the most trucks.

Trips using Main Road are long: a median of 50.0 minutes against 30.4 county-wide, the mark of a through route.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1ND 200Primary road · 2,600vehicles253trucks · 9.7%
Road class
Primary road
Congestion ratio
6.2%
Median trip time
30.7 min
Drivers’ median age
52.6 yrs
Drivers’ average income
$80,183

The busiest stretch of ND 200 carries 2.4 times the county average; trucks are 9.7% of it, below the county-wide 10.9%.

2ND 49Primary road · 2,096vehicles249trucks · 11.9%
Road class
Primary road
Congestion ratio
5.4%
Median trip time
28.0 min
Drivers’ median age
53.0 yrs
Drivers’ average income
$90,994

ND 49 carries 90% more than the county average on its busiest stretch, where the median trip lasts 28.0 minutes.

3ND 200 AltPrimary road · 1,501vehicles170trucks · 11.3%
Road class
Primary road
Congestion ratio
3.1%
Median trip time
39.6 min
Drivers’ median age
51.9 yrs
Drivers’ average income
$74,419

At 36% more than the county average, ND 200 Alt draws drivers from neighborhoods averaging $74,419 in household income.

461st Avenue SouthwestPrimary road · 1,416vehicles198trucks · 14.0%
Road class
Primary road
Congestion ratio
3.2%
Median trip time
42.2 min
Drivers’ median age
51.5 yrs
Drivers’ average income
$89,435

Drivers on 61st Avenue Southwest are on long journeys, a median 42.2 minutes against 30.4 county-wide: a through route more than a local street.

5Main StreetTertiary road · 1,282vehicles55trucks · 4.3%
Road class
Tertiary road
Median trip time
45.8 min
Drivers’ median age
53.4 yrs
Drivers’ average income
$95,239

Main Street carries through traffic: the median trip using it lasts 45.8 minutes, against 30.4 for the county.

Ranked by trucks per day

Cars and light vehiclesTrucks
1ND 200Primary road · #1 by traffic2,600vehicles253trucks · 9.7%
2ND 49Primary road · #2 by traffic2,096vehicles249trucks · 11.9%
361st Avenue SouthwestPrimary road · #4 by traffic1,416vehicles198trucks · 14.0%
4ND 200 AltPrimary road · #3 by traffic1,501vehicles170trucks · 11.3%
5Main RoadPrimary road · 1,194vehicles159trucks · 13.3%
Road class
Primary road
Congestion ratio
4.0%
Median trip time
50.0 min
Drivers’ median age
57.9 yrs
Drivers’ average income
$73,293

Main Road is busy by local standards, at 8% more than the county average on its busiest stretch; trucks are 13.3% of it, above the county-wide 10.9%.

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

MercerDepartment 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 Mercer County

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

Need segment-level traffic data?

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