
Total Traffic Volume & Performance in Whitman County, Washington
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day3,424 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 9.2% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 35.4 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. | 11.1% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 25.8 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $55,931 |
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A typical monitored road in Whitman County, Washington sees 3,424 vehicles per day, while its 344 miles of monitored roads together handle 837,137 vehicle-miles traveled per day (≈306 million per year). At 9.2%, the truck share runs above the 7.1% across Washington: about 1 in 11 vehicles.
Traffic 53% below the Washington average
Whitman sees 53% lower average daily traffic volume than the state average (3,424 vehicles per day against 7,322), suggesting less demand on each road - very light roads: easy truck access, but little passing trade for roadside retail. Across the whole network, that travel is about 0.5% of Washington's statewide total. Whitman carries less traffic than 58% of counties in Washington.
Journey times run 7% higher than the state level, at 35.4 minutes on average. 76% of counties in Washington have a shorter average travel time than Whitman's 35.4 minutes.
Congestion runs 44% lower than the state level, at a ratio of 11.1%, which means smoother traffic flow - travel times are easy to plan around for scheduled deliveries.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Whitman County, Washington
| Traffic | vehicles per day6,286 |
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| Trucks | 11.6% |
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| Average travel time | 51.4 min |
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| Congestion ratio | 14.9% |
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| Drivers’ average age | 34.9 yrs |
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| Drivers’ average income | $66,657 |
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Highways carry about half of all travel in Whitman County, Washington, 47% of vehicle-miles. The average highway carries 6,286 vehicles per day, 111% more than the average non-highway road in the same area, which carries 2,976 vehicles per day.
Highways make up 20% of the monitored road miles (68 miles, 421 segments), so they carry more than their share: 389,369 vehicle-miles traveled per day (≈142 million per year).
Higher highway truck share than 69% of counties in Washington
At 11.6%, highway truck share is 22% higher than the state average. Highways here lean toward freight, so highway access is a real asset for logistics operators.
69% of counties in Washington see a lower highway truck share than Whitman's 11.6%. Whitman's highway truck count is lower than 62% of counties in Washington, at roughly 727 trucks per day.

Non-highway Traffic in Whitman County, Washington
| Traffic | vehicles per day2,976 |
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| Trucks | 7.0% |
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| Average travel time | 32.9 min |
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| Congestion ratio | 10.6% |
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| Drivers’ average age | 24.9 yrs |
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| Drivers’ average income | $51,179 |
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Local roads carry about half of all travel in Whitman County, Washington, 53% of vehicle-miles. A typical local road sees 2,976 vehicles per day.
Local roads make up 80% of the monitored road miles (275 miles in 2,694 segments) but carry less than their share of travel: 447,768 vehicle-miles traveled per day (≈163 million per year). Trucks make up 7.0% of non-highway traffic, about 1 in 14 vehicles.
The youngest drivers of any county in Washington
The concentration of trucks on non-highway roads is 39% lower than on highways.
At 46% lower than the state level, the non-highway congestion ratio of 10.6% signals easier movement on local roads.
Trip origins here have lower average income than 97% of counties in Washington. Whitman has the lowest median driver age in Washington - 26 years.