
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 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 5.7% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 29.8 min |
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Congestion ratio The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network. | 20.3% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 45.0 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $100,664 |
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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 in Clark County, Washington
| Traffic | vehicles per day24,360 |
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| Trucks | 7.5% |
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| Average travel time | 32.4 min |
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| Congestion ratio | 48.3% |
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| Drivers’ average age | 45.4 yrs |
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| Drivers’ average income | $98,805 |
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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 in Clark County, Washington
| Traffic | vehicles per day5,752 |
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| Trucks | 4.1% |
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| Average travel time | 29.7 min |
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| Congestion ratio | 19.6% |
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| Drivers’ average age | 44.8 yrs |
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| Drivers’ average income | $102,060 |
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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.