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Kauai County, Hawaii Traffic Counts

This page delivers traffic analytics for Kauai County, Hawaii. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Kauai County, Hawaii among 180 road miles divided in 2,412 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 393 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.

8,197

Trucks

Trucks

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

5.0%

Average travel time

Average travel time

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

36.4 min

Congestion ratio

Congestion ratio

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

31.9%

Drivers’ average age

Drivers’ average age

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

50.4 yrs

Drivers’ average income

Drivers’ average income

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

$104,519

Our data indicates an estimated average traffic volume of 8,197 vehicles per day in Kauai County, Hawaii that results in 1,334,099 vehicle-miles traveled per day (≈487 million per year). The traffic stream is comprised of an average of 1 truck for every 20 vehicles. Typical time spent behind the wheel per trip is 36.4 minutes, which already accounts for delays at signals, intersections, and congestion.

Analytical insight

When compared to the Hawaii state averages: Kauai's average daily traffic volume is 21% lower than the state average - 8,197 vehicles per day against 10,441 - suggesting less traffic load per road, a critical factor for logistics and site planning. Network-wide, Kauai accounts for about 6.0% of Hawaii's statewide total, at 1,334,099 vehicle-miles traveled per day (≈487 million per year). Journey times here (36.4 minutes on average) closely track the state level. The congestion ratio of 31.9% is 8% higher, pointing to more pronounced congestion than the state level - crucial for traffic control improvement and logistics planning. 33% of counties in Hawaii see less traffic than Kauai's 8,197 vehicles per day. On travel time, Kauai runs longer than 33% of counties in Hawaii.

Highway vs. Non-Highway Traffic Analysis

Analytical insight

N/A
non-highway traffic icon

Non-highway traffic

Traffic

Traffic

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

8,197

Trucks

Trucks

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

5.0%

Average travel time

Average travel time

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

36.4 min

Congestion ratio

Congestion ratio

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

31.9%

Drivers’ average age

Drivers’ average age

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

50.4 yrs

Drivers’ average income

Drivers’ average income

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

$104,519

The non-highway road network in Kauai County, Hawaii supports a substantial volume of traffic. The average non-highway road carries 8,197 vehicles per day. That average covers 180 non-highway road miles divided in 2,412 segments (average segment length 393 ft), together carrying 1,334,099 vehicle-miles traveled per day (≈487 million per year). Trucks constitute 5.0% of non-highway traffic.

Analytical insight

At 13% higher than the state level, the non-highway congestion ratio of 31.9% signals more friction on local roads. 33% of counties in Hawaii see shorter overall travel times than Kauai. 67% of counties in Hawaii see lower average driver income among trip origins than Kauai. Kauai's median driver age is higher than 67% of counties in Hawaii.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–8:00 AM and PM peak 3:00 PM–6:00 PM, with volumes reaching approximately 119% higher than the daily average.
Weekend traffic:
Weekend volumes run about 19% below weekday levels.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
August–October is the high season, with volumes +3% versus the annual average.
Lowest month:
November is the quietest month, with volumes -3% versus the annual average.

Analytical insight

In Kauai County, Hawaii, the peak hour concentrates about 9% of the day's traffic, and seasonal swing is mild at +3% in high season.

Traffic Flow Profile Comparison

Metric

Kauai

Hawaii
Average

Difference

Traffic

8,197

10,441

-21.5%

Truck % (Total Traffic)

5.0%

5.4%

-6.9%

Truck % (Highway)

5.4%

Avg. Travel Time

36.4 min

36.4 min

+0.1%

How Kauai County compares

Kauai County against nearby areas

Against the 4 nearest areas, Kauai County moves 23.0% of the total daily travel; it has the third busiest roads of the five. The same kind of road, just less of it: traffic per road matches the areas around it while the network itself is smaller.

Kauai County and the 4 nearest county-level areas by centroid distance, with the Hawaii average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Kauai County8,1975.0%1,334,09936.4 min31.9%
Honolulu County, Hawaii12,1485.0%13,442,04136.1 min32.3%
Maui County, Hawaii9,0665.0%2,664,05937.8 min31.1%
Hawaii County, Hawaii7,3926.8%4,687,20836.4 min22.1%
Mendocino County, California7,3048.3%2,422,66232.1 min15.7%
Hawaii average10,4415.4%N/A36.4 min29.5%

Kauai County ranked within Hawaii

On all 4 measures below, Kauai County lands in the middle of the Hawaii field rather than at either end.

Where Kauai County sits among Hawaii'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.
MeasureKauai CountyHawaii rank
Traffic volume (AADT)8,197#3 of 4
Average travel time36.4 min#3 of 4
Average driver income$104,519#2 of 4
Average driver age50.4 yrs#2 of 4

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

HawaiiDepartment 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 Kauai County

The same traffic breakdown for the areas closest to Kauai County, Hawaii.

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