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Traffic | vehicles per day10,724 |
|---|---|
Trucks | 5.9% |
Average travel time | 33.9 min |
Congestion ratio | 25.2% |
Drivers’ average age | 42.1 yrs |
Drivers’ average income | $128,989 |
The average monitored road in King County, Washington carries 10,724 vehicles per day. Across its 2,742 miles of monitored roads, that adds up to 40,799,395 vehicle-miles traveled per day (≈14.9 billion per year). About 1 in 17 vehicles is a truck, fewer than the 1 in 14 across Washington.
At 10,724 vehicles per day, the average monitored road in King carries 46% more traffic than the state average of 7,322, suggesting more demand on each road - a busier backdrop for retail sites, at the cost of slower access. Across the whole network, that travel is about 26% of Washington's statewide total. At 10,724 vehicles per day, King posts the highest average traffic volume in Washington.
At 33.9 minutes, the average travel time matches the state level closely. Its average travel time of 33.9 minutes is longer than 55% of counties in Washington.
Congestion runs 27% higher than the state level, at a ratio of 25.2%, which means more pronounced congestion - expect slower peak-hour deliveries and less predictable arrival times.
| Traffic | vehicles per day42,218 |
|---|---|
| Trucks | 7.3% |
| Average travel time | 40.8 min |
| Congestion ratio | 57.4% |
| Drivers’ average age | 42.1 yrs |
| Drivers’ average income | $122,985 |
Highways carry about half of all travel in King County, Washington, 50% of vehicle-miles. The average highway carries 42,218 vehicles per day, 321% more than the average non-highway road in the same area, which carries 10,034 vehicles per day.
Highways make up 17% of the monitored road miles (461 miles, 2,372 segments), so they carry more than their share: 20,228,480 vehicle-miles traveled per day (≈7.4 billion per year).
By highway travel volume, King ranks first in Washington.
At 7.3%, highway truck share is 23% lower than the state average. Trucks are a small share of a very large highway flow, so King still moves heavy freight volumes alongside its passenger traffic.
88% of counties in Washington see a higher highway truck share than King's 7.3%. By raw truck volume, King carries more highway trucks than 91% of counties in Washington.
| Traffic | vehicles per day10,034 |
|---|---|
| Trucks | 4.4% |
| Average travel time | 33.7 min |
| Congestion ratio | 24.5% |
| Drivers’ average age | 42.0 yrs |
| Drivers’ average income | $133,514 |
Local roads carry about half of all travel in King County, Washington, 50% of vehicle-miles. On the average non-highway road, that comes to 10,034 vehicles per day.
Spread over 2,281 miles and 108,323 segments, 83% of the road network, local roads carry a lighter load per mile: 20,570,916 vehicle-miles traveled per day (≈7.5 billion per year). Trucks make up 4.4% of non-highway traffic, about 1 in 23 vehicles.
The concentration of trucks on non-highway roads is 40% lower than on highways.
The non-highway congestion ratio of 24.5% is 25% higher than the state level, suggesting slower local mobility than the state average.
King also has the highest average driver income in Washington among trip origins - $128,989. The driver population here skews younger than 92% of counties in Washington.
Mobile device location data (anonymized and aggregated)
Road sensor networks and traffic counters
Historical traffic pattern databases
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