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Traffic heat map of Grundy County, Missouri: 154 miles of roads shaded from blue (light) to red (heavy traffic), busiest on 9th Street and Main Street

Grundy County, Missouri Traffic Counts

Our Grundy County, Missouri traffic data covers 1,885 road segments over 154 road miles, with an average segment of just 431 ft. Its busiest road, 9th Street, carries 9,191 vehicles a day, 5.9 times the average road. Whether you are evaluating a new retail location, planning routes or assessing infrastructure, these numbers replace guesswork.
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 Grundy County, Missouri

Traffic

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

vehicles per day1,566
Trucks

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

8.5%
Average travel time

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

35.9 min
Drivers’ average age

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

48.9 yrs
Drivers’ average income

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

$55,958

The average monitored road in Grundy County, Missouri carries 1,566 vehicles per day. Across its 154 miles of monitored roads, that adds up to 192,844 vehicle-miles traveled per day (≈70.4 million per year). About 1 in 12 vehicles is a truck, in line with Missouri (9.8%).

Traffic 72% below the Missouri average

Grundy's average daily traffic volume is 72% lower than the state average - 1,566 vehicles per day against 5,631 - suggesting less traffic load per road - quiet roads that suit freight movement more than drive-by retail. In total volume terms, its road network carries about 0.1% of Missouri's statewide total of vehicle-miles. 69% of counties in Missouri see more traffic than Grundy's 1,566 vehicles per day.

The average trip takes 35.9 minutes, 15% higher than the state level. 85% of counties in Missouri have a shorter average travel time than Grundy's 35.9 minutes.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

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

Grundy County vs. Missouri Traffic Comparison

Grundy County's biggest difference from the Missouri average is its average daily traffic per road, 72% below it.

MetricGrundy CountyMissouri averageDifference
Traffic1,5665,631-72.2%
Truck % (Total Traffic)8.5%9.8%-13.0%
Avg. Travel Time35.9 min31.3 min+14.9%

How Grundy County compares

Grundy County has the lowest truck share of its nearby counties

Grundy County tracks the 4 areas around it closely - no measure in this table sets it far apart from the areas immediately next to it, though 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.

Grundy 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
Grundy County1,5668.5%192,84435.9 minN/A
Livingston County, Missouri2,27312.6%396,37733.2 min11.3%
Daviess County, Missouri1,41219.7%742,46342.2 minN/A
Mercer County, Missouri1,12110.6%94,14536.0 minN/A
Sullivan County, Missouri92511.1%119,68732.7 minN/A
Missouri average5,6319.8%N/A31.3 min19.4%

Grundy County ranked within Missouri

Average travel time places Grundy County #18 of 115 in Missouri - the top quarter of the state.

Grundy County ranked among 115 county-level areas in Missouri (1 = highest).
MeasureGrundy CountyMissouri rank
Traffic volume (AADT)1,566#80 of 115
Average travel time35.9 min#18 of 115
Average driver income$55,958#87 of 115
Average driver age48.9 yrs#61 of 115

Grundy County ranks #18 of 115 on average travel time but #87 of 115 on average driver income - the two describe the same roads and are worth reading together rather than either on its own.

Busiest roads in Grundy County, Missouri

Traffic concentrates on a few corridors: the three busiest roads average 6,356 vehicles a day, against 1,566 on the average road in Grundy County.

9th Street is the busiest road, at 9,191 vehicles a day, 735 of them trucks (8.0%). No other road comes close: Main Street, in second place, carries 5,754. It tops the truck ranking too, with the most trucks.

Harris Avenue draws drivers from lower-income areas: their neighborhoods average $41,496 in household income, 26% below the county's $55,958.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
19th StreetPrimary road · 9,191vehicles735trucks · 8.0%
Road class
Primary road
Median trip time
35.5 min
Drivers’ median age
48.5 yrs
Drivers’ average income
$52,743

9th Street carries 5.9 times the county average on its busiest stretch, where the median trip lasts 35.5 minutes.

2Main StreetPrimary road · 5,754vehicles526trucks · 9.1%
Road class
Primary road
Median trip time
35.5 min
Drivers’ median age
48.9 yrs
Drivers’ average income
$54,791

At 3.7 times the county average, Main Street draws drivers from neighborhoods averaging $54,791 in household income.

3MO 6Primary road · 4,123vehicles411trucks · 10.0%
Road class
Primary road
Median trip time
36.9 min
Drivers’ median age
49.6 yrs
Drivers’ average income
$56,372

The busiest stretch of MO 6 carries 2.6 times the county average; trucks are 10.0% of it, above the county-wide 8.5%.

410th StreetPrimary road · 3,528vehicles200trucks · 5.7%
Road class
Primary road
Median trip time
36.1 min
Drivers’ median age
48.9 yrs
Drivers’ average income
$57,466

On its busiest stretch, 10th Street carries 2.3 times the county average; trucks are 5.7% of it, below the county-wide 8.5%.

5Harris AvenueTertiary road · 2,960vehicles209trucks · 7.0%
Road class
Tertiary road
Median trip time
42.1 min
Drivers’ median age
50.6 yrs
Drivers’ average income
$41,496

Harris Avenue carries 89% more than the county average at its busiest, 209 of them trucks (7.0%, below the county-wide 8.5%).

Ranked by trucks per day

Cars and light vehiclesTrucks
19th StreetPrimary road · #1 by traffic9,191vehicles735trucks · 8.0%
2Main StreetPrimary road · #2 by traffic5,754vehicles526trucks · 9.1%
3MO 6Primary road · #3 by traffic4,123vehicles411trucks · 10.0%
4US 65Primary road · 2,538vehicles233trucks · 9.2%
Road class
Primary road
Median trip time
38.2 min
Drivers’ median age
48.4 yrs
Drivers’ average income
$59,773

US 65 carries 62% more than the county average on its busiest stretch, where the median trip lasts 38.2 minutes.

5Harris AvenueTertiary road · #5 by traffic2,960vehicles209trucks · 7.0%
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

GrundyDepartment 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 Grundy County

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

Need segment-level traffic data?

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