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TrafficThe average number of vehicles that travel each day over any road in the road network. | vehicles per day7,322 |
|---|---|
TrucksThe percentage of the total traffic volume composed of heavy vehicles. | 7.1% |
Average travel timeThe average time of travel averaged among all vehicles traveling on the road network. | 33.2 min |
Congestion ratioThe rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network. | 19.9% |
Drivers’ average ageAverage age of residents in the geographic areas where the vehicle trips originated. | 43.9 yrs |
Drivers’ average incomeAverage income of residents in the geographic areas where the vehicle trips originated. | $101,368 |
The average monitored road in Washington carries 7,322 vehicles per day. Across its 22,344 miles of monitored roads, that adds up to 155,256,676 vehicle-miles traveled per day (≈56.7 billion per year). Trucks are a smaller part of the mix than across the US: 7.1% against 9.3%.
Washington's average daily traffic volume of 7,322 vehicles per day is on par with the national average of 6,986. Network-wide, Washington accounts for about 2.0% of the national total of vehicle-miles. Washington carries more traffic than 68% of states nationwide.
Journey times here (33.2 minutes on average) closely track the national level. On travel time, Washington runs shorter than 54% of states nationwide.
The congestion ratio of 19.9% runs slightly higher than the national level (5% higher).
| Traffic | vehicles per day17,420 |
|---|---|
| Trucks | 9.5% |
| Average travel time | 40.5 min |
| Congestion ratio | 44.8% |
| Drivers’ average age | 45.0 yrs |
| Drivers’ average income | $99,247 |
Travel in Washington splits roughly evenly, with about half of it (47% of vehicle-miles) on highways. The average highway carries 17,420 vehicles per day, 151% more than the average non-highway road in the same area, which carries 6,931 vehicles per day.
Highways make up 18% of the monitored road miles (3,958 miles, 18,427 segments), so they carry more than their share: 73,065,771 vehicle-miles traveled per day (≈26.7 billion per year).
That is more highway travel volume than 66% of states nationwide.
The concentration of trucks on highways (9.5%) is 27% lower than the national average for similar road classifications. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.
88% of states nationwide see a higher highway truck share than Washington's 9.5%. Washington's highway truck count is lower than 52% of states nationwide, at roughly 1,657 trucks per day.
| Traffic | vehicles per day6,931 |
|---|---|
| Trucks | 5.0% |
| Average travel time | 33.0 min |
| Congestion ratio | 19.6% |
| Drivers’ average age | 43.7 yrs |
| Drivers’ average income | $103,010 |
Travel in Washington splits roughly evenly, with about half of it (53% of vehicle-miles) on local roads. The average non-highway road carries 6,931 vehicles per day.
Local roads make up 82% of the monitored road miles (18,386 miles in 476,065 segments) but carry less than their share of travel: 82,190,905 vehicle-miles traveled per day (≈30.0 billion per year). Trucks make up 5.0% of non-highway traffic, about 1 in 20 vehicles.
Non-highway roads carry a truck concentration that's 48% lower than the highway network.
Non-highway congestion (19.6%) runs slightly higher than the national level (7% higher).
Trip origins here have higher average income than 78% of states nationwide. 84% of states nationwide have an older driver population than Washington.
The highway truck share sets Washington apart: 27% below the United States average. Its truck share is also 24% below.
| Metric | Washington | United States average | Difference |
|---|---|---|---|
| Traffic | 7,322 | 6,986 | +4.8% |
| Truck % (Total Traffic) | 7.1% | 9.3% | -23.9% |
| Truck % (Highway) | 9.5% | 13.1% | -27.2% |
| Avg. Travel Time | 33.2 min | 33.3 min | -0.4% |
Compared with its 4 closest neighbours, Washington moves 2.5 times the total daily travel; it has the second busiest roads of the five. It is bigger rather than busier: the extra travel comes from carrying more road, not from heavier roads.
| State | Average daily traffic | Truck share | Daily vehicle-miles | Average travel time | Congestion ratio |
|---|---|---|---|---|---|
| Washington | 7,322 | 7.1% | 155,256,676 | 33.2 min | 19.9% |
| Oregon | 5,908 | 9.2% | 86,863,904 | 34.3 min | 16.6% |
| Idaho | 5,734 | 9.7% | 45,169,444 | 33.8 min | 16.0% |
| Montana | 4,202 | 11.7% | 28,466,944 | 36.2 min | 12.3% |
| Utah | 10,198 | 8.9% | 87,040,466 | 32.2 min | 21.2% |
| United States average | 6,986 | 9.3% | N/A | 33.3 min | 18.9% |
Washington's three busiest counties account for 48.0% of all the vehicle-miles measured in the state.
| County | Daily vehicle-miles | Average daily traffic | Truck share | Road miles |
|---|---|---|---|---|
| 1. King County | 40,799,395 | 10,724 | 5.9% | 2,742 |
| 2. Pierce County | 17,922,051 | 9,242 | 5.9% | 1,601 |
| 3. Snohomish County | 15,764,198 | 8,214 | 5.7% | 1,420 |
Washington's five most truck-intensive counties account for 12.7% of the truck vehicle-miles driven in the state.
| County | Truck share | Truck share on highways | Average daily traffic | Daily vehicle-miles |
|---|---|---|---|---|
| 1. Adams County | 17.6% | 20.1% | 2,523 | 1,620,370 |
| 2. Kittitas County | 16.3% | 18.1% | 3,711 | 3,473,823 |
| 3. Lincoln County | 14.4% | 19.0% | 1,381 | 715,271 |
| 4. Garfield County | 13.2% | 13.2% | 1,873 | 70,251 |
| 5. Cowlitz County | 12.3% | 15.5% | 5,120 | 3,588,922 |
Asking the same question of truck vehicle-miles gives a different answer - King County, Pierce County, Snohomish County, Spokane County and Kittitas County, together 50.0% of all truck travel in Washington.
Traffic concentrates on a few corridors: the three busiest roads average 158,911 vehicles a day, against 7,322 on the average road in Washington.
I 5 in King County leads with 179,635 vehicles a day, 13,209 of them trucks (7.3%). It also carries the most trucks.
Freight stands out on I 5 in Cowlitz County and I 5 in Lewis County: trucks are 15.9% and 13.7% of the traffic there, against 7.1% state-wide.
Drivers on Channel Bridge in King County come from neighborhoods with an average household income of $161,660, 59% above the state average of $101,368.
I 5 in Cowlitz County carries longer journeys than most roads here, with a median trip of 52.1 minutes against 33.2 state-wide.
I 5 is one of the more congested roads here: trips take 89% longer than at free-flow speed, against 20% state-wide.
Delays build on I 405: its congestion ratio of 84% over free-flow time is well above the state's 20%.
A main artery: I 5's busiest stretch carries 19.5 times the state average; trucks are 7.9% of it, above the state-wide 7.1%.
Channel Bridge is a trunk route for the state, carrying 18.8 times the state average on its busiest stretch; trucks are 5.6% of it, below the state-wide 7.1%.
I 90 carries 17.8 times the state average at its busiest, 6,259 of them trucks (4.8%, below the state-wide 7.1%).
I 5 carries 16.9 times the state average on its busiest stretch, where the median trip lasts 39.6 minutes.
At 16.4 times the state average, State Route 16 draws drivers from neighborhoods averaging $94,182 in household income.
A main artery: Mount Baker Ridge Tunnel's busiest stretch carries 16.1 times the state average; trucks are 4.6% of it, below the state-wide 7.1%.
I 405 is a trunk route for the state, carrying 15.7 times the state average on its busiest stretch; trucks are 4.7% of it, below the state-wide 7.1%.
Ship Canal Bridge carries 15.2 times the state average at its busiest, 4,300 of them trucks (3.9%, below the state-wide 7.1%).
Drivers on I 5 are on long journeys, a median 45.0 minutes against 33.2 state-wide: a through route more than a local street.
I 5 carries 8.3 times the state average on its busiest stretch, where the median trip lasts 52.1 minutes.
At 14.4 times the state average, Valley Freeway draws drivers from neighborhoods averaging $104,263 in household income.
A main artery: Valley Freeway's busiest stretch carries 10.7 times the state average; trucks are 11.5% of it, above the state-wide 7.1%.
I 5 is a trunk route for the state, carrying 12.4 times the state average on its busiest stretch; trucks are 9.6% of it, above the state-wide 7.1%.
I 5 carries through traffic: the median trip using it lasts 51.5 minutes, against 33.2 for the state.
The average monitored road in Washington carries 7,322 vehicles per day, in line with the national average of 6,986.
Washington carries more traffic than 68% of states nationwide, averaging 7,322 vehicles per day.
Traffic in Washington peaks in June–August, when volumes run 9% above the annual average. January is the quietest month, averaging 6,590 vehicles per day, 10% below the annual average.
Drivers on Washington roads have a median age of 44 years, and the median household income of the neighborhoods trips originate from averages $101,368, 11% above the national average.
Weekday traffic has two busy windows: a long morning plateau from 7:00 AM to 12:00 PM and PM peak 3:00 PM–5:00 PM - about 83% above the daily average.
I 5 in King County carries the most, 179,635 vehicles per day on its busiest stretch, followed by I 405 in King County (154,534), I 5 in Pierce County (142,564), Channel Bridge in King County (137,651), I 90 in King County (130,410). Figures are AADT, both directions combined.
I 5 in King County, with about 13,209 trucks per day on its busiest stretch, 7.3% of its 179,635 vehicles.
About 179,635 vehicles per day in both directions on its busiest stretch, including 13,209 trucks (7.3%). Traffic is lower on its quieter stretches; TrafficZoom shows the count for every segment.

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Traffic counts, truck share, congestion and driver demographics for each of the 39 counties TrafficZoom measures in Washington.