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Traffic heat map of Skagit County, Washington: 613 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 5 and State Route 20

Skagit County, Washington Traffic Counts

TrafficZoom tracks traffic on 613 road miles in Skagit County, Washington, divided into 13,260 segments averaging 244 ft. Its busiest road, I 5, carries 58,922 vehicles a day, 11.1 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 Volume & Performance in Skagit County, Washington

Traffic

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

vehicles per day5,307
Trucks

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

7.6%
Average travel time

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

31.9 min
Congestion ratio

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

17.0%
Drivers’ average age

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

47.2 yrs
Drivers’ average income

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

$86,285

The average monitored road in Skagit County, Washington carries 5,307 vehicles per day. Across its 613 miles of monitored roads, that adds up to 3,814,193 vehicle-miles traveled per day (≈1.4 billion per year). Trucks are 7.6% of traffic, close to the 7.1% across Washington.

Shorter trips than 79% of counties in Washington

Skagit sees 28% lower average daily traffic volume than the state average (5,307 vehicles per day against 7,322), suggesting less demand on each road - less drive-by exposure for retail, but easier access for deliveries. In total volume terms, its road network carries about 2.5% of Washington's statewide total of vehicle-miles. By volume, Skagit's 5,307 vehicles per day outpaces 71% of counties in Washington.

The average trip takes 31.9 minutes, on par with the state level. 79% of counties in Washington have a longer average travel time than Skagit's 31.9 minutes.

Congestion is somewhat lower than the state level, at a ratio of 17.0% (15% lower) - crucial for traffic control improvement and logistics planning.

Highway vs. Non-Highway Traffic Analysis

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Highway Traffic in Skagit County, Washington

Trafficvehicles per day22,672
Trucks9.9%
Average travel time43.9 min
Congestion ratio52.1%
Drivers’ average age46.1 yrs
Drivers’ average income$87,599

Travel in Skagit County, Washington splits roughly evenly, with about half of it (51% of vehicle-miles) on highways. The average highway carries 22,672 vehicles per day, 355% more than the average non-highway road in the same area, which carries 4,979 vehicles per day.

Yet highways are only 13% of the road network, 79 miles in 246 segments, so each mile of them is 3.9 times as busy as the average road mile.

By highway travel volume, Skagit outranks 66% of counties in Washington.

More highway trucks than 84% of counties in Washington

At 9.9%, the highway truck share matches the state average for similar road classifications. The highway traffic mix is typical for Washington: neither freight- nor commuter-dominated.

56% of counties in Washington see a higher highway truck share than Skagit's 9.9%. Skagit's highway truck count is higher than 84% of counties in Washington, at roughly 2,235 trucks per day.

non-highway traffic icon

Non-highway Traffic in Skagit County, Washington

Trafficvehicles per day4,979
Trucks5.2%
Average travel time31.6 min
Congestion ratio16.3%
Drivers’ average age48.0 yrs
Drivers’ average income$85,256

Travel in Skagit County, Washington splits roughly evenly, with about half of it (49% of vehicle-miles) on local roads. A typical local road sees 4,979 vehicles per day.

Local roads make up 87% of the monitored road miles (534 miles in 13,014 segments) but carry less than their share of travel: 1,873,063 vehicle-miles traveled per day (≈684 million per year). About 1 in 19 vehicles on non-highway roads is a truck (5.2%).

Drivers from higher-income areas than 74% of counties in Washington

Compared to highways, non-highway routes see 47% fewer trucks by share.

Non-highway congestion (16.3%) runs 17% lower than the state average, pointing to smoother local traffic flow.

74% of counties in Washington see lower average driver income among trip origins than Skagit. 50% of counties in Washington have a younger driver population than Skagit.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 10:00 AM–12:00 PM and PM peak 4:00 PM–5:00 PM, with volumes reaching approximately 103% higher than the daily average.
Weekend traffic:
Weekend traffic is about as busy as on weekdays (-4%): leisure and through trips largely replace the commute.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +9% 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 Skagit County, Washington, the peak hour concentrates about 8% of the day's traffic, and there is a noticeable seasonal swing of +9% in high season.

Skagit County vs. Washington Traffic Comparison

Skagit County's biggest difference from the Washington average is its average daily traffic per road, 28% below it.

MetricSkagit CountyWashington averageDifference
Traffic5,3077,322-27.5%
Truck % (Total Traffic)7.6%7.1%+6.6%
Truck % (Highway)9.9%9.5%+3.7%
Avg. Travel Time31.9 min33.2 min-3.9%

How Skagit County compares

Skagit County has a higher truck share than any nearby county

Skagit County tracks the 4 areas around it closely - no measure in this table sets it far apart from the areas immediately next to it, though it has the third busiest roads of the five.

Skagit 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
Skagit County5,3077.6%3,814,19331.9 min17.0%
Whatcom County, Washington6,6426.1%3,927,26229.9 min19.5%
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%

Skagit County ranked within Washington

Skagit County sits in the top quarter of the Washington field on highway truck volume, at #6 of 33.

Skagit County ranked among 39 county-level areas in Washington (1 = highest); measures without data in every county rank a smaller field, down to 33.
MeasureSkagit CountyWashington rank
Traffic volume (AADT)5,307#12 of 39
Highway vehicle-miles per day1,941,131#12 of 33
Truck share on highways9.9%#19 of 33
Highway trucks per day2,235#6 of 33
Average travel time31.9 min#31 of 39
Average driver income$86,285#11 of 39
Average driver age47.2 yrs#20 of 39

Skagit County ranks #6 of 33 on highway truck volume but #31 of 39 on average travel time - the two describe the same roads and are worth reading together rather than either on its own.

Busiest roads in Skagit County, Washington

The three busiest roads in Skagit County average 39,151 vehicles a day, 7.4 times the county average of 5,307 across all its monitored roads.

I 5 leads with 58,922 vehicles a day, 6,084 of them trucks (10.3%). No other road comes close: State Route 20, in second place, carries 32,790. It tops the truck ranking too, with the most trucks.

Trips using I 5 are long: a median of 44.3 minutes against 31.9 county-wide, the mark of a through route.

Burlington Boulevard is busy with cars rather than freight: only 3.8% of its traffic is trucks, against 7.6% county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 5Motorway · 58,922vehicles6,084trucks · 10.3%
Road class
Motorway
Congestion ratio
63.6%
Median trip time
44.3 min
Drivers’ median age
45.4 yrs
Drivers’ average income
$88,148

I 5 is one of the more congested roads here: trips take 64% longer than at free-flow speed, against 17% county-wide.

2State Route 20Trunk road · 32,790vehicles2,760trucks · 8.4%
Road class
Trunk road
Congestion ratio
38.5%
Median trip time
43.0 min
Drivers’ median age
48.6 yrs
Drivers’ average income
$86,325

State Route 20 carries through traffic: the median trip using it lasts 43.0 minutes, against 31.9 for the county.

3Burlington BoulevardSecondary road · 25,742vehicles965trucks · 3.8%
Road class
Secondary road
Congestion ratio
38.1%
Median trip time
32.1 min
Drivers’ median age
47.6 yrs
Drivers’ average income
$81,335

Burlington Boulevard peaks at 25,742 vehicles a day, 4.9 times the county average; trucks are 3.8% of it, below the county-wide 7.6%.

4Cascade HighwayPrimary road · 22,026vehicles946trucks · 4.3%
Road class
Primary road
Congestion ratio
68.1%
Median trip time
32.1 min
Drivers’ median age
47.8 yrs
Drivers’ average income
$80,131

Delays build on Cascade Highway: its congestion ratio of 68% over free-flow time is well above the county's 17%.

5State Route 20 SpurTrunk road · 21,040vehicles1,598trucks · 7.6%
Road class
Trunk road
Congestion ratio
26.2%
Median trip time
29.2 min
Drivers’ median age
52.4 yrs
Drivers’ average income
$87,611

State Route 20 Spur carries 4.0 times the county average at its busiest, 1,598 of them trucks (7.6%, in line with the county-wide 7.6%).

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 5Motorway · #1 by traffic58,922vehicles6,084trucks · 10.3%
2State Route 20Trunk road · #2 by traffic32,790vehicles2,760trucks · 8.4%
3State Route 20 SpurTrunk road · #5 by traffic21,040vehicles1,598trucks · 7.6%
4Rio Vista AvenuePrimary road · 19,215vehicles1,213trucks · 6.3%
Road class
Primary road
Congestion ratio
41.4%
Median trip time
36.5 min
Drivers’ median age
48.8 yrs
Drivers’ average income
$82,106

Rio Vista Avenue carries 3.6 times the county average on its busiest stretch, where the median trip lasts 36.5 minutes.

5Moore StreetPrimary road · 20,218vehicles1,102trucks · 5.5%
Road class
Primary road
Congestion ratio
53.0%
Median trip time
30.4 min
Drivers’ median age
48.3 yrs
Drivers’ average income
$78,961

At 3.8 times the county average, Moore Street draws drivers from neighborhoods averaging $78,961 in household income.

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

SkagitDepartment 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 Skagit County

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

Need segment-level traffic data?

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