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Traffic heat map of Whatcom County, Washington: 601 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 5 and Meridian Street

Whatcom County, Washington Traffic Counts

TrafficZoom tracks traffic on 601 road miles in Whatcom County, Washington, divided into 11,361 segments averaging 280 ft. Its busiest road, I 5, carries 39,424 vehicles a day, 5.9 times the average road. Built from cross-verified mobile and road-sensor data, these counts help you size up a retail site, plan logistics routes or assess infrastructure needs.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
Updated:
September 29, 2026
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total traffic icon

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
Trucks

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

6.1%
Average travel time

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

29.9 min
Congestion ratio

The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.

19.5%
Drivers’ average age

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

43.4 yrs
Drivers’ average income

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

$84,115

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 icon

Highway Traffic in Whatcom County, Washington

Trafficvehicles per day14,702
Trucks7.4%
Average travel time34.2 min
Congestion ratio30.4%
Drivers’ average age44.0 yrs
Drivers’ average income$83,736

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 icon

Non-highway Traffic in Whatcom County, Washington

Trafficvehicles per day6,015
Trucks5.2%
Average travel time29.6 min
Congestion ratio18.6%
Drivers’ average age43.0 yrs
Drivers’ average income$84,424

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.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 10:00 AM–12:00 PM and PM peak 3:00 PM–5:00 PM, with volumes reaching approximately 95% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 9% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +8% versus the annual average.
Lowest month:
January is the quietest month, with volumes -11% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Whatcom County, Washington, the peak hour concentrates about 8% of the day's traffic, and there is a noticeable seasonal swing of +8% in high season.

Whatcom County vs. Washington Traffic Comparison

The highway truck share sets Whatcom County apart: 22% below the Washington average.

MetricWhatcom CountyWashington averageDifference
Traffic6,6427,322-9.3%
Truck % (Total Traffic)6.1%7.1%-13.8%
Truck % (Highway)7.4%9.5%-21.9%
Avg. Travel Time29.9 min33.2 min-9.9%

How Whatcom County compares

Whatcom County against nearby counties

Against the 4 nearest areas, Whatcom County carries 48.5% more traffic on a typical road; it has the second busiest roads of the five.

Whatcom 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
Whatcom County6,6426.1%3,927,26229.9 min19.5%
Skagit County, Washington5,3077.6%3,814,19331.9 min17.0%
Snohomish County, Washington8,2145.7%15,764,19832.2 min21.0%
Island County, Washington3,5735.4%1,028,96533.9 min15.2%
San Juan County, Washington7976.3%74,15134.4 minN/A
Washington average7,3227.1%N/A33.2 min19.9%

Whatcom County ranked within Washington

Average travel time places Whatcom County #36 of 39 in Washington - the bottom quarter of the state.

Whatcom County ranked among 39 county-level areas in Washington (1 = highest); measures without data in every county rank a smaller field, down to 33.
MeasureWhatcom CountyWashington rank
Traffic volume (AADT)6,642#6 of 39
Highway vehicle-miles per day1,685,916#14 of 33
Truck share on highways7.4%#28 of 33
Highway trucks per day1,092#16 of 33
Average travel time29.9 min#36 of 39
Average driver income$84,115#16 of 39
Average driver age43.4 yrs#34 of 39

The two ends of this table sit far apart: #6 of 39 on average daily traffic volume, against #36 of 39 on average travel time.

Busiest roads in Whatcom County, Washington

Traffic concentrates on a few corridors: the three busiest roads average 31,676 vehicles a day, against 6,642 on the average road in Whatcom County.

I 5 is the busiest road, at 39,424 vehicles a day, 3,044 of them trucks (7.7%). It tops the truck ranking too, with the most trucks.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 5Motorway · 39,424vehicles3,044trucks · 7.7%
Road class
Motorway
Congestion ratio
55.3%
Median trip time
34.1 min
Drivers’ median age
44.0 yrs
Drivers’ average income
$81,085

Delays build on I 5: its congestion ratio of 55% over free-flow time is well above the county's 19%.

2Meridian StreetTrunk road · 30,014vehicles1,521trucks · 5.1%
Road class
Trunk road
Congestion ratio
34.0%
Median trip time
32.2 min
Drivers’ median age
43.0 yrs
Drivers’ average income
$81,318

Meridian Street carries 4.5 times the county average at its busiest, 1,521 of them trucks (5.1%, below the county-wide 6.1%).

3Bakerview RoadPrimary road · 25,590vehicles985trucks · 3.9%
Road class
Primary road
Congestion ratio
44.2%
Median trip time
26.3 min
Drivers’ median age
43.4 yrs
Drivers’ average income
$69,389

Bakerview Road carries 3.9 times the county average on its busiest stretch, where the median trip lasts 26.3 minutes.

4Lakeway DriveSecondary road · 24,214vehicles994trucks · 4.1%
Road class
Secondary road
Congestion ratio
43.6%
Median trip time
24.8 min
Drivers’ median age
41.5 yrs
Drivers’ average income
$86,786

At 3.6 times the county average, Lakeway Drive draws drivers from neighborhoods averaging $86,786 in household income.

5Main StreetSecondary road · 24,108vehicles1,207trucks · 5.0%
Road class
Secondary road
Congestion ratio
60.3%
Median trip time
29.6 min
Drivers’ median age
44.3 yrs
Drivers’ average income
$89,855

Travel on Main Street's busiest stretch runs 60% over free-flow time, against 19% across the county, so expect slower peak hours.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 5Motorway · #1 by traffic39,424vehicles3,044trucks · 7.7%
2Meridian StreetTrunk road · #2 by traffic30,014vehicles1,521trucks · 5.1%
3Main StreetSecondary road · #5 by traffic24,108vehicles1,207trucks · 5.0%
4Sunset DrivePrimary road · 19,659vehicles1,018trucks · 5.2%
Road class
Primary road
Congestion ratio
29.3%
Median trip time
30.6 min
Drivers’ median age
43.4 yrs
Drivers’ average income
$81,090

The busiest stretch of Sunset Drive carries 3.0 times the county average; trucks are 5.2% of it, below the county-wide 6.1%.

5Lakeway DriveSecondary road · #4 by traffic24,214vehicles994trucks · 4.1%
How to read these road counts
  • The first number is AADT, annual average daily traffic: the vehicles passing a point on an average day, both directions combined and trucks included. On a divided highway both carriageways are added together.
  • Traffic changes along a road, with more near interchanges and towns and less in open country. Every figure for a road describes its busiest stretch in the county, so the two rankings show the same numbers for the same road.
  • The second number is the trucks on that stretch, a part of its AADT. The bar splits the AADT into cars and light vehicles (blue) and trucks (amber).
  • See segment-level AADT for any road on TrafficZoom.

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

WhatcomDepartment of Transportation

Demographic Baseline for O-D Modeling

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

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Counties near Whatcom County

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

Need segment-level traffic data?

Identify traffic patterns street by street and analyze the exact corridors that matter to your project.