
Total Traffic Volume & Performance in Navajo County, Arizona
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day5,493 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 17.1% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 35.0 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. | 13.1% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 53.8 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $64,512 |
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A typical monitored road in Navajo County, Arizona sees 5,493 vehicles per day, while its 870 miles of monitored roads together handle 3,588,709 vehicle-miles traveled per day (≈1.3 billion per year). Freight weighs heavily here: trucks are 17.1% of traffic, against 9.6% across Arizona.
Traffic 45% below the Arizona average
Navajo's average daily traffic volume is 45% lower than the state average - 5,493 vehicles per day against 10,009 - suggesting less traffic load per road - lighter roads for freight, but less passing trade for roadside retail. Across the whole network, that travel is about 2.1% of Arizona's statewide total. By volume, Navajo's 5,493 vehicles per day trails 57% of counties in Arizona.
At 35.0 minutes, the average travel time is 6% higher than the state level. Its average travel time of 35.0 minutes is longer than 64% of counties in Arizona.
At 28% lower than the state level, the 13.1% congestion ratio signals smoother traffic flow - fewer delays make delivery windows more reliable.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Navajo County, Arizona
| Traffic | vehicles per day8,065 |
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| Trucks | 22.6% |
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| Average travel time | 39.6 min |
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| Congestion ratio | 14.7% |
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| Drivers’ average age | 51.9 yrs |
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| Drivers’ average income | $64,626 |
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Highways carry more than half of all travel in Navajo County, Arizona (64% of vehicle-miles). The average highway carries 8,065 vehicles per day, 82% more than the average non-highway road in the same area, which carries 4,421 vehicles per day.
Highways make up 41% of the monitored road miles (360 miles, 1,573 segments), so they carry more than their share: 2,314,497 vehicle-miles traveled per day (≈845 million per year).
A major freight corridor
The concentration of trucks on highways (22.6%) is 62% higher than the state average for similar road classifications. That marks Navajo as a major freight corridor, where highway access is what logistics operators compete on.
Navajo's highway truck share (22.6%) is higher than 77% of counties in Arizona. 69% of counties in Arizona see more highway trucks per day than Navajo's roughly 1,823.

Non-highway Traffic in Navajo County, Arizona
| Traffic | vehicles per day4,421 |
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| Trucks | 7.3% |
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| Average travel time | 33.1 min |
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| Congestion ratio | 12.5% |
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| Drivers’ average age | 55.2 yrs |
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| Drivers’ average income | $64,390 |
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Local roads carry a significant share of travel in Navajo County, Arizona: 36% of all vehicle-miles. A typical local road sees 4,421 vehicles per day.
Spread over 510 miles and 3,772 segments, 59% of the road network, local roads carry a lighter load per mile: 1,274,212 vehicle-miles traveled per day (≈465 million per year). The truck share on non-highway roads is 7.3%.
Older drivers than 71% of counties in Arizona
The concentration of trucks on non-highway roads is 68% lower than on highways.
At 31% lower than the state level, the non-highway congestion ratio of 12.5% signals easier movement on local roads.
Trip origins here have lower average income than 64% of counties in Arizona. 71% of counties in Arizona have a younger driver population than Navajo.