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Traffic heat map of Clay County, Missouri: 661 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 29 and MO 152

Clay County, Missouri Traffic Counts

It ranks among the top 5 counties in Missouri for average daily traffic. This page breaks down traffic in Clay County, Missouri across 661 miles of monitored roads split into 12,144 segments, using multi-sourced mobile and sensor data. It goes beyond raw counts to truck flow, congestion and who is driving, so site selection and route planning rest on evidence.
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 Clay County, Missouri

Traffic

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

vehicles per day8,643
Trucks

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

7.4%
Average travel time

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

30.2 min
Congestion ratio

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

23.4%
Drivers’ average age

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

44.8 yrs
Drivers’ average income

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

$98,498

The average monitored road in Clay County, Missouri carries 8,643 vehicles per day. Across its 661 miles of monitored roads, that adds up to 6,918,570 vehicle-miles traveled per day (≈2.5 billion per year). Trucks are a smaller part of the mix than across Missouri: 7.4% against 9.8%.

Busier roads than 96% of counties in Missouri

Clay sees 53% higher average daily traffic volume than the state average (8,643 vehicles per day against 5,631), suggesting more demand on each road - prime passing trade for storefronts, with more competition for road space. Across the whole network, that travel is about 4.0% of Missouri's statewide total. Clay carries more traffic than 96% of counties in Missouri.

The average trip takes 30.2 minutes, on par with the state level. On travel time, Clay runs shorter than 77% of counties in Missouri.

Congestion runs 20% higher than the state level, at a ratio of 23.4%, which means more pronounced congestion - crucial for traffic control improvement and logistics planning.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Clay County, Missouri

Trafficvehicles per day22,265
Trucks9.2%
Average travel time32.7 min
Congestion ratio53.3%
Drivers’ average age45.0 yrs
Drivers’ average income$97,323

Highways carry more than half of all travel in Clay County, Missouri (63% of vehicle-miles). The average highway carries 22,265 vehicles per day, 213% more than the average non-highway road in the same area, which carries 7,121 vehicles per day.

With 33% of the road miles (216 miles in 1,221 segments), highways punch above their length, carrying 4,386,132 vehicle-miles traveled per day (≈1.6 billion per year).

No more than 4 other counties in Missouri move more traffic on their highways.

Lower highway truck share than 95% of counties in Missouri

The concentration of trucks on highways (9.2%) is 32% lower than the state average for similar road classifications. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.

Clay's highway truck share (9.2%) is lower than 95% of counties in Missouri. Clay's highway truck count is higher than 73% of counties in Missouri, at roughly 2,046 trucks per day.

non-highway traffic icon

Non-highway Traffic in Clay County, Missouri

Trafficvehicles per day7,121
Trucks4.4%
Average travel time29.9 min
Congestion ratio20.1%
Drivers’ average age44.6 yrs
Drivers’ average income$100,342

Local roads carry a significant share of travel in Clay County, Missouri: 37% of all vehicle-miles. The average non-highway road carries 7,121 vehicles per day.

Spread over 445 miles and 10,923 segments, 67% of the road network, local roads carry a lighter load per mile: 2,532,439 vehicle-miles traveled per day (≈924 million per year). The truck share on non-highway roads is 4.4%.

Drivers from higher-income areas than 97% of counties in Missouri

The concentration of trucks on non-highway roads is 52% lower than on highways.

Non-highway congestion (20.1%) runs slightly higher than the state level (8% higher).

Trip origins here have higher average income than 97% of counties in Missouri. The driver population here skews younger than 93% of counties in Missouri.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–8:00 AM and PM peak 4:00 PM–7:00 PM, with volumes reaching approximately 77% higher than the daily average.
Weekend traffic:
Weekends are much quieter: volumes run about 36% below weekday levels, the signature of a commute-driven road network.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
Traffic is nearly flat through the year: even June–August, the busiest stretch, runs only +3% versus the annual average.
Lowest month:
January is the quietest month, with volumes -7% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Clay County, Missouri, the peak hour concentrates about 7% of the day's traffic, and traffic stays steady through the year (+3% in high season).

Clay County vs. Missouri Traffic Comparison

Clay County's biggest difference from the Missouri average is its average daily traffic per road, 53% above it. Its highway truck share, by contrast, is 32% below.

MetricClay CountyMissouri averageDifference
Traffic8,6435,631+53.5%
Truck % (Total Traffic)7.4%9.8%-24.2%
Truck % (Highway)9.2%13.4%-31.7%
Avg. Travel Time30.2 min31.3 min-3.5%

How Clay County compares

Clay County against nearby counties

Set against the average of the 4 areas nearest to it, Clay County carries 80.3% more traffic on a typical road; it has the second busiest roads of the five.

Clay 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
Clay County8,6437.4%6,918,57030.2 min23.4%
Platte County, Missouri5,14510.7%3,762,39628.7 min17.1%
Clinton County, Missouri2,94215.7%1,030,07529.7 minN/A
Jackson County, Missouri8,9377.2%17,616,09530.9 min23.3%
Ray County, Missouri2,1519.7%523,98030.3 minN/A
Missouri average5,6319.8%N/A31.3 min19.4%

Clay County ranked within Missouri

Clay County sits in the top quarter of the Missouri field on average driver income, at #4 of 115.

Clay County ranked among 115 county-level areas in Missouri (1 = highest); measures without data in every county rank a smaller field, down to 93.
MeasureClay CountyMissouri rank
Traffic volume (AADT)8,643#5 of 115
Highway vehicle-miles per day4,386,132#4 of 93
Truck share on highways9.2%#88 of 93
Highway trucks per day2,046#26 of 93
Average travel time30.2 min#89 of 115
Average driver income$98,498#4 of 115
Average driver age44.8 yrs#107 of 115

Clay County ranks #4 of 93 on highway travel volume but #88 of 93 on truck share on highways. It carries some of the heaviest highway traffic in Missouri, but very little of it is freight - this is commuter and local car volume, not through-trucking.

Busiest roads in Clay County, Missouri

Traffic concentrates on a few corridors: the three busiest roads average 67,937 vehicles a day, against 8,643 on the average road in Clay County.

I 29 leads with 86,757 vehicles a day, 7,511 of them trucks (8.7%). Lamar Hunt Memorial Highway carries the most trucks, 8,945 a day (16.8% of its traffic), although it ranks #4 for all traffic.

Freight stands out on Lamar Hunt Memorial Highway and Chicago-Kansas City Expressway: trucks are 16.8% and 12.6% of the traffic there, against 7.4% county-wide.

Trips using Lamar Hunt Memorial Highway are long: a median of 39.5 minutes against 30.2 county-wide, the mark of a through route.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 29Motorway · 86,757vehicles7,511trucks · 8.7%
Road class
Motorway
Congestion ratio
65.3%
Median trip time
35.8 min
Drivers’ median age
44.5 yrs
Drivers’ average income
$85,904

I 29 is one of the more congested roads here: trips take 65% longer than at free-flow speed, against 23% county-wide.

2MO 152Motorway · 58,587vehicles2,909trucks · 5.0%
Road class
Motorway
Congestion ratio
58.1%
Median trip time
32.5 min
Drivers’ median age
45.0 yrs
Drivers’ average income
$105,408

A main artery: MO 152's busiest stretch carries 6.8 times the county average; trucks are 5.0% of it, below the county-wide 7.4%.

3I 35Motorway · 58,466vehicles5,301trucks · 9.1%
Road class
Motorway
Congestion ratio
58.6%
Median trip time
33.5 min
Drivers’ median age
44.5 yrs
Drivers’ average income
$96,975

Delays build on I 35: its congestion ratio of 59% over free-flow time is well above the county's 23%.

4Lamar Hunt Memorial HighwayMotorway · 53,142vehicles8,945trucks · 16.8%
Road class
Motorway
Congestion ratio
39.2%
Median trip time
39.5 min
Drivers’ median age
45.4 yrs
Drivers’ average income
$92,582

Lamar Hunt Memorial Highway is a trunk route for the county, carrying 6.1 times the county average on its busiest stretch; trucks are 16.8% of it, above the county-wide 7.4%.

5Kansas StreetTrunk road · 52,632vehicles1,784trucks · 3.4%
Road class
Trunk road
Congestion ratio
52.2%
Median trip time
30.7 min
Drivers’ median age
45.1 yrs
Drivers’ average income
$99,555

Kansas Street carries 6.1 times the county average at its busiest, 1,784 of them trucks (3.4%, below the county-wide 7.4%).

Ranked by trucks per day

Cars and light vehiclesTrucks
1Lamar Hunt Memorial HighwayMotorway · #4 by traffic53,142vehicles8,945trucks · 16.8%
2I 29Motorway · #1 by traffic86,757vehicles7,511trucks · 8.7%
3Chicago-Kansas City ExpresswayMotorway · 47,482vehicles5,980trucks · 12.6%
Road class
Motorway
Congestion ratio
58.2%
Median trip time
37.1 min
Drivers’ median age
45.4 yrs
Drivers’ average income
$95,123

Chicago-Kansas City Expressway carries 5.5 times the county average on its busiest stretch, where the median trip lasts 37.1 minutes.

4I 35Motorway · #3 by traffic58,466vehicles5,301trucks · 9.1%
5I 435Motorway · 30,394vehicles3,434trucks · 11.3%
Road class
Motorway
Congestion ratio
27.4%
Median trip time
36.1 min
Drivers’ median age
44.7 yrs
Drivers’ average income
$107,429

I 435 peaks at 30,394 vehicles a day, 3.5 times the county average; trucks are 11.3% of it, above the county-wide 7.4%.

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

ClayDepartment 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 Clay County

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

Need segment-level traffic data?

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