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Traffic heat map of Harrison County, Missouri: 236 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Miller Street and I 35

Harrison County, Missouri Traffic Counts

How busy are the roads of Harrison County, Missouri? We measure 236 road miles, divided into 1,637 segments, with multi-sourced, cross-verified mobile and sensor data. Its highways carry one of the top 5 truck shares of any county in Missouri. 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 Harrison County, Missouri

Traffic

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

vehicles per day1,759
Trucks

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

20.7%
Average travel time

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

30.9 min
Congestion ratio

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

3.2%
Drivers’ average age

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

50.7 yrs
Drivers’ average income

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

$57,653

The average monitored road in Harrison County, Missouri carries 1,759 vehicles per day. Across its 236 miles of monitored roads, that adds up to 593,427 vehicle-miles traveled per day (≈217 million per year). Freight weighs heavily here: trucks are 20.7% of traffic, against 9.8% across Missouri.

Congestion 83% below the Missouri average

Harrison's average daily traffic volume is 69% lower than the state average - 1,759 vehicles per day against 5,631 - suggesting less traffic load per road - very light roads: easy truck access, but little passing trade for roadside retail. In total volume terms, its road network carries about 0.3% of Missouri's statewide total of vehicle-miles. By volume, Harrison's 1,759 vehicles per day trails 61% of counties in Missouri.

At 30.9 minutes, the average travel time matches the state level closely. Its average travel time of 30.9 minutes is shorter than 68% of counties in Missouri.

The congestion ratio of 3.2% is 83% lower, pointing to smoother traffic flow than the state level - delays are rare enough to plan travel times almost to the minute.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Harrison County, Missouri

Trafficvehicles per day5,245
Trucks26.1%
Average travel time60.2 min
Drivers’ average age48.6 yrs
Drivers’ average income$60,218

Most travel in Harrison County, Missouri happens on highways, 70% of all vehicle-miles. The average highway carries 5,245 vehicles per day, 222% more than the average non-highway road in the same area, which carries 1,630 vehicles per day.

With 28% of the road miles (65 miles in 58 segments), highways punch above their length, carrying 416,910 vehicle-miles traveled per day (≈152 million per year).

A major freight corridor

The concentration of trucks on highways (26.1%) is 94% higher than the state average for similar road classifications. That marks Harrison as a major freight corridor, where highway access is what logistics operators compete on.

By truck concentration, highways here outrank 97% of counties in Missouri. By raw truck volume, Harrison carries more highway trucks than 59% of counties in Missouri.

non-highway traffic icon

Non-highway Traffic in Harrison County, Missouri

Trafficvehicles per day1,630
Trucks8.0%
Average travel time29.9 min
Congestion ratio3.2%
Drivers’ average age51.5 yrs
Drivers’ average income$55,915

Local roads carry a smaller share of travel in Harrison County, Missouri, 30% of vehicle-miles; most driving happens on highways. A typical local road sees 1,630 vehicles per day.

Spread over 171 miles and 1,579 segments, 72% of the road network, local roads carry a lighter load per mile: 176,517 vehicle-miles traveled per day (≈64.4 million per year). About 1 in 13 vehicles on non-highway roads is a truck (8.0%).

Local congestion 83% below the Missouri average

The concentration of trucks on non-highway roads is 69% lower than on highways.

Non-highway congestion (3.2%) runs 83% lower than the state average, pointing to smoother local traffic flow.

Trip origins here have lower average income than 70% of counties in Missouri. The driver population here skews older than 73% of counties in Missouri.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

In Harrison County, Missouri, the peak hour concentrates about 7% of the day's traffic.

Harrison County vs. Missouri Traffic Comparison

Harrison County's biggest difference from the Missouri average is its truck share, 111% above it. Its highway truck share is also 94% above.

MetricHarrison CountyMissouri averageDifference
Traffic1,7595,631-68.8%
Truck % (Total Traffic)20.7%9.8%+111.2%
Truck % (Highway)26.1%13.4%+94.3%
Avg. Travel Time30.9 min31.3 min-1.1%

How Harrison County compares

Harrison County has the busiest roads among its nearby counties

Set against the average of the 4 areas nearest to it, Harrison County runs 8.3 percentage points more truck traffic and carries 58.0% more traffic on a typical road; it has the 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.

Harrison County and the 4 nearest county-level areas by centroid distance, with the Missouri average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Harrison County1,75920.7%593,42730.9 min3.2%
Gentry County, Missouri1,4889.8%160,99534.0 minN/A
Daviess County, Missouri1,41219.7%742,46342.2 minN/A
Mercer County, Missouri1,12110.6%94,14536.0 minN/A
Worth County, Missouri4329.5%29,17524.0 minN/A
Missouri average5,6319.8%N/A31.3 min19.4%

Harrison County ranked within Missouri

Truck share on highways places Harrison County #4 of 93 in Missouri - the top quarter of the state.

Harrison County ranked among 115 county-level areas in Missouri (1 = highest); measures without data in every county rank a smaller field, down to 93.
MeasureHarrison CountyMissouri rank
Traffic volume (AADT)1,759#70 of 115
Highway vehicle-miles per day416,910#54 of 93
Truck share on highways26.1%#4 of 93
Highway trucks per day1,371#39 of 93
Average travel time30.9 min#79 of 115
Average driver income$57,653#81 of 115
Average driver age50.7 yrs#32 of 115

Busiest roads in Harrison County, Missouri

On their busiest stretches, the three busiest roads in Harrison County carry 11,524 vehicles a day on average, 6.6 times the typical road in the county (1,759).

Miller Street is the busiest road, at 12,989 vehicles a day, 753 of them trucks (5.8%). I 35 is practically level with it at 12,731. I 35 carries the most trucks, 3,328 a day (26.1% of its traffic), although it ranks #2 for all traffic.

I 35 carries longer journeys than most roads here, with a median trip of 60.2 minutes against 30.9 county-wide.

25th Street is busy with cars rather than freight: only 5.1% of its traffic is trucks, against 20.7% county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Miller StreetPrimary road · 12,989vehicles753trucks · 5.8%
Road class
Primary road
Median trip time
30.5 min
Drivers’ median age
51.0 yrs
Drivers’ average income
$57,786

Miller Street is a trunk route for the county, carrying 7.4 times the county average on its busiest stretch; trucks are 5.8% of it, below the county-wide 20.7%.

2I 35Motorway · 12,731vehicles3,328trucks · 26.1%
Road class
Motorway
Median trip time
60.2 min
Drivers’ median age
48.6 yrs
Drivers’ average income
$60,218

I 35 carries 7.2 times the county average at its busiest, 3,328 of them trucks (26.1%, above the county-wide 20.7%).

325th StreetPrimary road · 8,854vehicles452trucks · 5.1%
Road class
Primary road
Median trip time
29.9 min
Drivers’ median age
51.3 yrs
Drivers’ average income
$58,416

25th Street carries 5.0 times the county average on its busiest stretch, where the median trip lasts 29.9 minutes.

4Main StreetTertiary road · 6,101vehicles215trucks · 3.5%
Road class
Tertiary road
Median trip time
30.4 min
Drivers’ median age
52.1 yrs
Drivers’ average income
$55,447

The busiest stretch of Main Street carries 3.5 times the county average; trucks are 3.5% of it, below the county-wide 20.7%.

5Bethany AvenuePrimary road · 5,129vehicles389trucks · 7.6%
Road class
Primary road
Median trip time
31.8 min
Drivers’ median age
51.8 yrs
Drivers’ average income
$59,290

On its busiest stretch, Bethany Avenue carries 2.9 times the county average; trucks are 7.6% of it, below the county-wide 20.7%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 35Motorway · #2 by traffic12,731vehicles3,328trucks · 26.1%
2Miller StreetPrimary road · #1 by traffic12,989vehicles753trucks · 5.8%
325th StreetPrimary road · #3 by traffic8,854vehicles452trucks · 5.1%
4Bethany AvenuePrimary road · #5 by traffic5,129vehicles389trucks · 7.6%
5310th StreetPrimary road · 2,582vehicles263trucks · 10.2%
Road class
Primary road
Median trip time
38.3 min
Drivers’ median age
50.9 yrs
Drivers’ average income
$53,865

310th Street carries 47% more than the county average at its busiest, 263 of them trucks (10.2%, below the county-wide 20.7%).

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

HarrisonDepartment 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 Harrison County

The same traffic breakdown for the areas closest to Harrison County, Missouri.

Need segment-level traffic data?

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