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San Juan County, Washington Traffic Counts

This page delivers traffic analytics for San Juan County, Washington. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for San Juan County, Washington among 95 road miles divided in 2,246 segments. Our metrics go beyond simple volume counts to provide actionable insights on traffic intensity, congestion, commercial vehicle flow, and network performance with highest possible granularity (average segment length is 223 ft). Whether you are evaluating a new retail location, planning logistics routes, or assessing infrastructure needs, this data helps you move from assumptions to certainty.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
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Total Traffic Volume & Performance

Traffic

Traffic

The average number of vehicles that travel each day over any road in the road network.

797

Trucks

Trucks

The percentage of the total traffic volume composed of heavy vehicles.

6.3%

Average travel time

Average travel time

The average time of travel averaged among all vehicles traveling on the road network.

34.4 min

Drivers’ average age

Drivers’ average age

Average age of residents in the geographic areas where the vehicle trips originated.

57.8 yrs

Drivers’ average income

Drivers’ average income

Average income of residents in the geographic areas where the vehicle trips originated.

$84,223

Our data indicates an estimated average traffic volume of 797 vehicles per day in San Juan County, Washington that results in 74,151 vehicle-miles traveled per day (≈27.1 million per year). The traffic stream is comprised of an average of 1 truck for every 16 vehicles. Typical time spent behind the wheel per trip is 34.4 minutes, which already accounts for delays at signals, intersections, and congestion.

Analytical insight

When compared to the Washington state averages: San Juan sees 89% lower average daily traffic volume than the state average (797 vehicles per day against 7,322), suggesting less demand on each road - a critical factor for logistics and site planning. In total volume terms, its road network carries 74,151 vehicle-miles traveled per day (≈27.1 million per year), about 0.0% of Washington's statewide total. Journey times run 4% higher than the state level, at 34.4 minutes on average. At 797 vehicles per day, San Juan posts the lowest average traffic volume in Washington. Its average travel time of 34.4 minutes is longer than 63% of counties in Washington.

Highway vs. Non-Highway Traffic Analysis

Analytical insight

N/A
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Non-highway traffic

Traffic

Traffic

The average number of vehicles that travel each day over any road in the road network.

797

Trucks

Trucks

The percentage of the total traffic volume composed of heavy vehicles.

6.3%

Average travel time

Average travel time

The average time of travel averaged among all vehicles traveling on the road network.

34.4 min

Drivers’ average age

Drivers’ average age

Average age of residents in the geographic areas where the vehicle trips originated.

57.8 yrs

Drivers’ average income

Drivers’ average income

Average income of residents in the geographic areas where the vehicle trips originated.

$84,223

The non-highway road network in San Juan County, Washington supports a substantial volume of traffic. The average non-highway road carries 797 vehicles per day. That average covers 95 non-highway road miles divided in 2,246 segments (average segment length 223 ft), together carrying 74,151 vehicle-miles traveled per day (≈27.1 million per year). Trucks constitute 6.3% of non-highway traffic.

Analytical insight

63% of counties in Washington see shorter overall travel times than San Juan. San Juan's average driver income exceeds 63% of counties in Washington. 89% of counties in Washington have a younger driver population than San Juan.

Time-of-Day & Seasonal Patterns

Analytical insight

In San Juan County, Washington, the peak hour concentrates about 8% of the day's traffic.

Traffic Flow Profile Comparison

Metric

San Juan

Washington
Average

Difference

Traffic

797

7,322

-89.1%

Truck % (Total Traffic)

6.3%

7.1%

-11.7%

Truck % (Highway)

9.5%

Avg. Travel Time

34.4 min

33.2 min

+3.7%

How San Juan County compares

San Juan County against nearby areas

Against the 4 nearest areas, San Juan County moves 2.9% of the total daily travel and carries 84.6% less traffic on a typical road; it has the quietest roads of the five. Smaller and quieter on both counts: a shorter network than the areas around it, carrying lighter traffic across it.

San Juan County and the 4 nearest county-level areas by centroid distance, with the Washington average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
San Juan County7976.3%74,15134.4 minN/A
Island County, Washington3,5735.4%1,028,96533.9 min15.2%
Skagit County, Washington5,3077.6%3,814,19331.9 min17.0%
Whatcom County, Washington6,6426.1%3,927,26229.9 min19.5%
Clallam County, Washington5,2046.3%1,337,87833.8 min16.0%
Washington average7,3227.1%N/A33.2 min19.9%

San Juan County ranked within Washington

No county-level area in Washington records a lower average daily traffic volume than San Juan County.

Where San Juan County sits among Washington's county-level areas on each measure. Rank 1 is the highest value in the state, whether or not that is the outcome you want; the field size differs by measure because not every county carries highway data.
MeasureSan Juan CountyWashington rank
Traffic volume (AADT)797#39 of 39
Average travel time34.4 min#15 of 39
Average driver income$84,223#15 of 39
Average driver age57.8 yrs#5 of 39

San Juan County ranks #5 of 39 on average driver age but #39 of 39 on average daily traffic volume - the two describe the same roads and are worth reading together rather than either on its own.

Data Sources & Methodology

The data presented on this page is derived from TrafficZoom's proprietary analytics platform, which aggregates and normalizes information from multiple sources, including:

Mobile device location data (anonymized and aggregated)

Road sensor networks and traffic counters

Historical traffic pattern databases

Public traffic count programs published by the

WashingtonDepartment of Transportation

Historical traffic pattern databases

U.S. Census Bureau
All metrics represent estimates based on statistical modeling and are intended for strategic planning purposes.
TrafficZoom methodology
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Data current as of:
Q3 2026

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Counties near San Juan County

The same traffic breakdown for the areas closest to San Juan County, Washington.

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