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Traffic heat map of Washington County, Missouri: 226 miles of roads shaded from blue (light) to red (heavy traffic), busiest on High Street and MO 8

Washington County, Missouri Traffic Counts

Our Washington County, Missouri traffic data covers 2,310 road segments over 226 road miles, with an average segment of just 516 ft. Its busiest road, High Street, carries 25,661 vehicles a day, 7.1 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 Washington County, Missouri

Traffic

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

vehicles per day3,634
Trucks

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

7.8%
Average travel time

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

30.7 min
Drivers’ average age

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

48.4 yrs
Drivers’ average income

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

$59,265

Our data shows 3,634 vehicles per day on the average road in Washington County, Missouri, and 597,119 vehicle-miles traveled per day (≈218 million per year) across its 226 miles of monitored roads. About 1 in 13 vehicles is a truck, fewer than the 1 in 10 across Missouri.

Busier roads than 76% of counties in Missouri

At 3,634 vehicles per day, the average monitored road in Washington carries 35% less traffic than the state average of 5,631, suggesting less demand on each road - lighter roads for freight, but less 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, Washington's 3,634 vehicles per day outpaces 76% of counties in Missouri.

The average trip takes 30.7 minutes, on par with the state level. 71% of counties in Missouri have a longer average travel time than Washington's 30.7 minutes.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–8:00 AM and a long afternoon plateau from 3:00 PM to 7:00 PM, with volumes reaching approximately 77% higher than the daily average.
Weekend traffic:
Weekends are much quieter: volumes run about 23% 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 August–October, the busiest stretch, runs only +4% versus the annual average.
Lowest month:
January is the quietest month, with volumes -13% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Washington County, Missouri, the peak hour concentrates about 7% of the day's traffic, and traffic stays steady through the year (+4% in high season).

Washington County vs. Missouri Traffic Comparison

Washington County's biggest difference from the Missouri average is its average daily traffic per road, 35% below it. Its truck share is also 21% below.

MetricWashington CountyMissouri averageDifference
Traffic3,6345,631-35.5%
Truck % (Total Traffic)7.8%9.8%-21.1%
Avg. Travel Time30.7 min31.3 min-1.9%

How Washington County compares

Washington County against nearby counties

Against the 4 nearest areas, Washington County moves 24.5% of the total daily travel; it has the third 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.

Washington 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
Washington County3,6347.8%597,11930.7 minN/A
St. Francois County, Missouri6,0537.7%1,926,47830.1 min8.3%
Crawford County, Missouri2,33120.1%1,196,75430.2 minN/A
Jefferson County, Missouri6,3297.0%6,507,22730.6 min17.3%
Iron County, Missouri1,65310.7%138,08129.9 minN/A
Missouri average5,6319.8%N/A31.3 min19.4%

Washington County ranked within Missouri

Washington County sits in the top quarter of the Missouri field on average daily traffic volume, at #28 of 115.

Washington County ranked among 115 county-level areas in Missouri (1 = highest).
MeasureWashington CountyMissouri rank
Traffic volume (AADT)3,634#28 of 115
Average travel time30.7 min#82 of 115
Average driver income$59,265#73 of 115
Average driver age48.4 yrs#72 of 115

Busiest roads in Washington County, Missouri

The three busiest roads in Washington County average 16,103 vehicles a day, 4.4 times the county average of 3,634 across all its monitored roads.

High Street leads with 25,661 vehicles a day, 1,729 of them trucks (6.7%). No other road comes close: MO 8, in second place, carries 14,771. It tops the truck ranking too, with the most trucks.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1High StreetPrimary road · 25,661vehicles1,729trucks · 6.7%
Road class
Primary road
Median trip time
28.5 min
Drivers’ median age
48.1 yrs
Drivers’ average income
$57,508

A main artery: High Street's busiest stretch carries 7.1 times the county average; trucks are 6.7% of it, below the county-wide 7.8%.

2MO 8Primary road · 14,771vehicles1,123trucks · 7.6%
Road class
Primary road
Median trip time
33.5 min
Drivers’ median age
47.6 yrs
Drivers’ average income
$58,348

The busiest stretch of MO 8 carries 4.1 times the county average; trucks are 7.6% of it, in line with the county-wide 7.8%.

3Park DriveTertiary road · 7,877vehicles380trucks · 4.8%
Road class
Tertiary road
Median trip time
25.4 min
Drivers’ median age
48.5 yrs
Drivers’ average income
$56,653

On its busiest stretch, Park Drive carries 2.2 times the county average; trucks are 4.8% of it, below the county-wide 7.8%.

4Missouri StreetTertiary road · 7,768vehicles352trucks · 4.5%
Road class
Tertiary road
Median trip time
27.4 min
Drivers’ median age
48.6 yrs
Drivers’ average income
$54,183

Missouri Street peaks at 7,768 vehicles a day, 2.1 times the county average; trucks are 4.5% of it, below the county-wide 7.8%.

5MO 21Primary road · 7,358vehicles649trucks · 8.8%
Road class
Primary road
Median trip time
34.0 min
Drivers’ median age
49.4 yrs
Drivers’ average income
$58,600

MO 21 carries 2.0 times the county average at its busiest, 649 of them trucks (8.8%, above the county-wide 7.8%).

Ranked by trucks per day

Cars and light vehiclesTrucks
1High StreetPrimary road · #1 by traffic25,661vehicles1,729trucks · 6.7%
2MO 8Primary road · #2 by traffic14,771vehicles1,123trucks · 7.6%
3MO 21Primary road · #5 by traffic7,358vehicles649trucks · 8.8%
4Park DriveTertiary road · #3 by traffic7,877vehicles380trucks · 4.8%
5Missouri StreetTertiary road · #4 by traffic7,768vehicles352trucks · 4.5%
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

WashingtonDepartment 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 Washington County

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

Need segment-level traffic data?

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