
Total Traffic Volume & Performance in Hawaii County, Hawaii
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day7,392 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 6.8% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 36.4 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. | 22.1% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 50.7 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $84,637 |
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Our data shows 7,392 vehicles per day on the average road in Hawaii County, Hawaii, and 4,687,208 vehicle-miles traveled per day (≈1.7 billion per year) across its 716 miles of monitored roads. Trucks are 6.8% of traffic, more than the 5.4% across Hawaii.
The quietest roads of any county in Hawaii
At 7,392 vehicles per day, the average monitored road in Hawaii carries 29% less traffic than the state average of 10,441, suggesting less demand on each road - lighter roads for freight, but less passing trade for roadside retail. Network-wide, Hawaii accounts for about 21% of Hawaii's statewide total of vehicle-miles. Hawaii stands out as having the lowest traffic volume in Hawaii - 7,392 vehicles per day.
At 36.4 minutes, the average travel time matches the state level closely. 67% of counties in Hawaii have a shorter average travel time than Hawaii's 36.4 minutes.
At 25% lower than the state level, the 22.1% congestion ratio signals smoother traffic flow - fewer delays make delivery windows more reliable.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Hawaii County, Hawaii
| Traffic | vehicles per day15,020 |
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| Trucks | 6.1% |
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| Average travel time | 35.9 min |
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| Drivers’ average age | 51.0 yrs |
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| Drivers’ average income | $79,812 |
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Only a small share of travel in Hawaii County, Hawaii happens on highways: 12% of vehicle-miles. The average highway carries 15,020 vehicles per day, 115% more than the average non-highway road in the same area, which carries 6,993 vehicles per day.
With 5% of the road miles (37 miles in 342 segments), highways punch above their length, carrying 566,724 vehicle-miles traveled per day (≈207 million per year).
The highest highway truck share of any county in Hawaii
The concentration of trucks on highways (6.1%) is 15% higher than the state average for similar road classifications. The highway traffic mix is typical for Hawaii: neither freight- nor commuter-dominated.
By share, Hawaii has the highest highway truck concentration in Hawaii, at 6.1%. By raw volume, Hawaii carries the lowest number of highway trucks in Hawaii - roughly 953 trucks per day.

Non-highway Traffic in Hawaii County, Hawaii
| Traffic | vehicles per day6,993 |
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| Trucks | 6.9% |
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| Average travel time | 36.5 min |
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| Congestion ratio | 22.1% |
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| Drivers’ average age | 50.6 yrs |
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| Drivers’ average income | $85,728 |
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Local roads carry the vast majority of travel in Hawaii County, Hawaii, 88% of all vehicle-miles. On the average non-highway road, that comes to 6,993 vehicles per day.
Their share of road miles is similar, 95% (680 miles in 6,531 segments), carrying 4,120,484 vehicle-miles traveled per day (≈1.5 billion per year). About 1 in 14 vehicles on non-highway roads is a truck (6.9%).
The lowest driver income of any county in Hawaii
Unusually, the concentration of trucks on non-highway roads is 13% higher than on highways.
At 22% lower than the state level, the non-highway congestion ratio of 22.1% signals easier movement on local roads.
Hawaii also has the lowest average driver income in Hawaii among trip origins - $84,637. Drivers here also skew toward the highest median age in Hawaii, at 51 years.