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Traffic heat map of Clark County, Washington: 1,043 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 5 and I 205

Clark County, Washington Traffic Counts

TrafficZoom tracks traffic on 1,043 road miles in Clark County, Washington, divided into 34,663 segments averaging 159 ft. It is one of the top 5 counties in Washington for highway travel volume. Built from cross-verified mobile and road-sensor data, these counts help you size up a retail site, plan logistics routes or assess infrastructure needs.
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 Clark County, Washington

Traffic

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

vehicles per day6,209
Trucks

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

5.7%
Average travel time

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

29.8 min
Congestion ratio

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

20.3%
Drivers’ average age

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

45.0 yrs
Drivers’ average income

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

$100,664

The average monitored road in Clark County, Washington carries 6,209 vehicles per day. Across its 1,043 miles of monitored roads, that adds up to 8,959,052 vehicle-miles traveled per day (≈3.3 billion per year). Trucks are a smaller part of the mix than across Washington: 5.7% against 7.1%.

Shorter trips than 95% of counties in Washington

At 6,209 vehicles per day, the average monitored road in Clark carries 15% less traffic than the state average of 7,322, suggesting less demand on each road - a critical factor for logistics and site planning. Network-wide, Clark accounts for about 5.8% of Washington's statewide total of vehicle-miles. By volume, Clark's 6,209 vehicles per day outpaces 82% of counties in Washington.

Journey times run 10% lower than the state level, at 29.8 minutes on average. 95% of counties in Washington have a longer average travel time than Clark's 29.8 minutes.

At 20.3%, the congestion ratio matches the state level closely.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Clark County, Washington

Trafficvehicles per day24,360
Trucks7.5%
Average travel time32.4 min
Congestion ratio48.3%
Drivers’ average age45.4 yrs
Drivers’ average income$98,805

Highways carry about half of all travel in Clark County, Washington, 46% of vehicle-miles. The average highway carries 24,360 vehicles per day, 323% more than the average non-highway road in the same area, which carries 5,752 vehicles per day.

That comes from just 13% of the monitored road miles: 132 miles in 850 segments, carrying 4,113,051 vehicle-miles traveled per day (≈1.5 billion per year).

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

Lower highway truck share than 81% of counties in Washington

The concentration of trucks on highways (7.5%) is 21% 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.

By truck concentration, highways here trail 81% of counties in Washington. By raw truck volume, Clark carries more highway trucks than 81% of counties in Washington.

non-highway traffic icon

Non-highway Traffic in Clark County, Washington

Trafficvehicles per day5,752
Trucks4.1%
Average travel time29.7 min
Congestion ratio19.6%
Drivers’ average age44.8 yrs
Drivers’ average income$102,060

Local roads carry about half of all travel in Clark County, Washington, 54% of vehicle-miles. On the average non-highway road, that comes to 5,752 vehicles per day.

Local roads make up 87% of the monitored road miles (910 miles in 33,813 segments) but carry less than their share of travel: 4,846,002 vehicle-miles traveled per day (≈1.8 billion per year). The truck share on non-highway roads is 4.1%.

Drivers from higher-income areas than 92% of counties in Washington

Non-highway roads carry a truck concentration that's 45% lower than the highway network.

At 19.6%, the non-highway congestion ratio matches the state level closely.

Clark's average driver income is higher than 92% of counties in Washington. 68% of counties in Washington have an older driver population than Clark.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
A long morning plateau from 8:00 AM to 12:00 PM and a long afternoon plateau from 3:00 PM to 8:00 PM, with volumes reaching approximately 83% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 12% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +8% versus the annual average.
Lowest month:
February is the quietest month, with volumes -14% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Clark County, Washington, the peak hour concentrates about 8% of the day's traffic, and there is a noticeable seasonal swing of +8% in high season.

Clark County vs. Washington Traffic Comparison

Clark County's biggest difference from the Washington average is its highway truck share, 21% below it. Its truck share is also 20% below.

MetricClark CountyWashington averageDifference
Traffic6,2097,322-15.2%
Truck % (Total Traffic)5.7%7.1%-20.4%
Truck % (Highway)7.5%9.5%-21.5%
Avg. Travel Time29.8 min33.2 min-10.3%

How Clark County compares

Clark County has the lowest truck share of its nearby counties

Set against the average of the 4 areas nearest to it, Clark County is 30.3% more congested; it has the second busiest roads of the five.

Clark County and the 4 nearest county-level areas by centroid distance, with the Washington average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Clark County6,2095.7%8,959,05229.8 min20.3%
Multnomah County, Oregon10,2437.2%13,759,96935.7 min26.9%
Cowlitz County, Washington5,12012.3%3,588,92233.2 min15.0%
Skamania County, Washington1,6088.4%195,22833.9 min9.1%
Columbia County, Oregon3,9267.8%979,01431.5 min11.4%
Washington average7,3227.1%N/A33.2 min19.9%

Clark County ranked within Washington

Average travel time places Clark County #37 of 39 in Washington - the bottom quarter of the state.

Clark County ranked among 39 county-level areas in Washington (1 = highest); measures without data in every county rank a smaller field, down to 33.
MeasureClark CountyWashington rank
Traffic volume (AADT)6,209#8 of 39
Highway vehicle-miles per day4,113,051#4 of 33
Truck share on highways7.5%#27 of 33
Highway trucks per day1,820#7 of 33
Average travel time29.8 min#37 of 39
Average driver income$100,664#4 of 39
Average driver age45.0 yrs#27 of 39

The two ends of this table sit far apart: #4 of 39 on average driver income, against #37 of 39 on average travel time.

Busiest roads in Clark County, Washington

Traffic concentrates on a few corridors: the three busiest roads average 78,201 vehicles a day, against 6,209 on the average road in Clark County.

I 5 is the busiest road, at 90,782 vehicles a day, 8,756 of them trucks (9.6%). It tops the truck ranking too, with the most trucks.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 5Motorway · 90,782vehicles8,756trucks · 9.6%
Road class
Motorway
Congestion ratio
62.3%
Median trip time
37.6 min
Drivers’ median age
46.0 yrs
Drivers’ average income
$99,380

I 5 carries 14.6 times the county average on its busiest stretch, where the median trip lasts 37.6 minutes.

2I 205Motorway · 76,960vehicles5,235trucks · 6.8%
Road class
Motorway
Congestion ratio
70.9%
Median trip time
31.7 min
Drivers’ median age
45.5 yrs
Drivers’ average income
$98,818

Travel on I 205's busiest stretch runs 71% over free-flow time, against 20% across the county, so expect slower peak hours.

3Glenn L. Jackson Memorial BridgeMotorway · 66,861vehicles4,003trucks · 6.0%
Road class
Motorway
Congestion ratio
39.1%
Median trip time
30.9 min
Drivers’ median age
44.7 yrs
Drivers’ average income
$92,614

At 10.8 times the county average, Glenn L. Jackson Memorial Bridge draws drivers from neighborhoods averaging $92,614 in household income.

4Southeast Mill Plain BoulevardPrimary road · 61,404vehicles2,280trucks · 3.7%
Road class
Primary road
Congestion ratio
66.1%
Median trip time
33.0 min
Drivers’ median age
44.9 yrs
Drivers’ average income
$86,641

Southeast Mill Plain Boulevard is one of the more congested roads here: trips take 66% longer than at free-flow speed, against 20% county-wide.

5Southeast Lewis and Clark HighwayMotorway · 52,175vehicles2,706trucks · 5.2%
Road class
Motorway
Congestion ratio
53.4%
Median trip time
29.4 min
Drivers’ median age
45.9 yrs
Drivers’ average income
$100,933

A main artery: Southeast Lewis and Clark Highway's busiest stretch carries 8.4 times the county average; trucks are 5.2% of it, below the county-wide 5.7%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 5Motorway · #1 by traffic90,782vehicles8,756trucks · 9.6%
2I 205Motorway · #2 by traffic76,960vehicles5,235trucks · 6.8%
3Glenn L. Jackson Memorial BridgeMotorway · #3 by traffic66,861vehicles4,003trucks · 6.0%
4Southeast Lewis and Clark HighwayMotorway · #5 by traffic52,175vehicles2,706trucks · 5.2%
5Southeast Mill Plain BoulevardPrimary road · #4 by traffic61,404vehicles2,280trucks · 3.7%
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

ClarkDepartment 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 Clark County

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

Need segment-level traffic data?

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