
Total Traffic Volume & Performance in Whatcom County, Washington
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day6,642 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 6.1% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 29.9 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. | 19.5% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 43.4 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $84,115 |
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A typical monitored road in Whatcom County, Washington sees 6,642 vehicles per day, while its 601 miles of monitored roads together handle 3,927,262 vehicle-miles traveled per day (≈1.4 billion per year). Trucks are 6.1% of traffic, close to the 7.1% across Washington.
Shorter trips than 92% of counties in Washington
Whatcom's average daily traffic volume is 9% lower than the state average - 6,642 vehicles per day against 7,322. Network-wide, Whatcom accounts for about 2.5% of Washington's statewide total of vehicle-miles. By volume, Whatcom's 6,642 vehicles per day outpaces 87% of counties in Washington.
Journey times run 10% lower than the state level, at 29.9 minutes on average. On travel time, Whatcom runs shorter than 92% of counties in Washington.
Congestion here (19.5%) closely tracks the state level.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Whatcom County, Washington
| Traffic | vehicles per day14,702 |
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| Trucks | 7.4% |
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| Average travel time | 34.2 min |
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| Congestion ratio | 30.4% |
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| Drivers’ average age | 44.0 yrs |
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| Drivers’ average income | $83,736 |
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A significant share of driving in Whatcom County, Washington, 43% of vehicle-miles, happens on highways. The average highway carries 14,702 vehicles per day, 144% more than the average non-highway road in the same area, which carries 6,015 vehicles per day.
With 17% of the road miles (102 miles in 820 segments), highways punch above their length, carrying 1,685,916 vehicle-miles traveled per day (≈615 million per year).
By highway travel volume, Whatcom outranks 59% of counties in Washington.
Lower highway truck share than 84% of counties in Washington
Highway truck concentration here runs 22% lower than the state average, at 7.4%. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.
Whatcom's highway truck share (7.4%) is lower than 84% of counties in Washington. Whatcom's highway truck count is higher than 53% of counties in Washington, at roughly 1,092 trucks per day.

Non-highway Traffic in Whatcom County, Washington
| Traffic | vehicles per day6,015 |
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| Trucks | 5.2% |
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| Average travel time | 29.6 min |
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| Congestion ratio | 18.6% |
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| Drivers’ average age | 43.0 yrs |
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| Drivers’ average income | $84,424 |
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Local roads carry more than half of all travel in Whatcom County, Washington (57% of vehicle-miles). The average non-highway road carries 6,015 vehicles per day.
Local roads make up 83% of the monitored road miles (499 miles in 10,541 segments) but carry less than their share of travel: 2,241,346 vehicle-miles traveled per day (≈818 million per year). The truck share on non-highway roads is 5.2%.
Younger drivers than 87% of counties in Washington
Non-highway roads carry a truck concentration that's 30% lower than the highway network.
At 18.6%, the non-highway congestion ratio matches the state level closely.
Whatcom's average driver income is higher than 61% of counties in Washington. Whatcom's median driver age is lower than 87% of counties in Washington.