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Traffic | vehicles per day6,427 |
|---|---|
Trucks | 6.9% |
Average travel time | 33.9 min |
Congestion ratio | 19.9% |
Drivers’ average age | 47.3 yrs |
Drivers’ average income | $116,528 |
The average monitored road in Napa County, California carries 6,427 vehicles per day. Across its 369 miles of monitored roads, that adds up to 3,100,053 vehicle-miles traveled per day (≈1.1 billion per year). About 1 in 14 vehicles is a truck, in line with California (7.8%).
Napa sees 50% lower average daily traffic volume than the state average (6,427 vehicles per day against 12,766), suggesting less demand on each road - less drive-by exposure for retail, but easier access for deliveries. Across the whole network, that travel is about 0.3% of California's statewide total. Napa carries less traffic than 51% of counties in California.
Journey times here (33.9 minutes on average) closely track the state level. On travel time, Napa runs longer than 54% of counties in California.
At 27% lower than the state level, the 19.9% congestion ratio signals smoother traffic flow - fewer delays make delivery windows more reliable.
| Traffic | vehicles per day25,073 |
|---|---|
| Trucks | 8.4% |
| Average travel time | 39.3 min |
| Congestion ratio | 55.9% |
| Drivers’ average age | 46.2 yrs |
| Drivers’ average income | $116,959 |
Highways carry a significant share of travel in Napa County, California: 37% of all vehicle-miles. The average highway carries 25,073 vehicles per day, 320% more than the average non-highway road in the same area, which carries 5,977 vehicles per day.
Yet highways are only 11% of the road network, 41 miles in 188 segments, so each mile of them is 3.4 times as busy as the average road mile.
The concentration of trucks on highways (8.4%) is 19% lower than the state average for similar road classifications. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.
75% of counties in California see a higher highway truck share than Napa's 8.4%. 61% of counties in California see more highway trucks per day than Napa's roughly 2,104.
| Traffic | vehicles per day5,977 |
|---|---|
| Trucks | 6.1% |
| Average travel time | 33.8 min |
| Congestion ratio | 19.0% |
| Drivers’ average age | 48.2 yrs |
| Drivers’ average income | $116,252 |
A little more than half of the driving in Napa County, California happens on local roads: 63% of all vehicle-miles. A typical local road sees 5,977 vehicles per day.
Local roads make up 89% of the monitored road miles (328 miles in 7,782 segments) but carry less than their share of travel: 1,955,287 vehicle-miles traveled per day (≈714 million per year). About 1 in 16 vehicles on non-highway roads is a truck (6.1%).
Non-highway roads carry a truck concentration that's 28% lower than the highway network.
The non-highway congestion ratio of 19.0% is 28% lower than the state level, suggesting more efficient local mobility than the state average.
79% of counties in California see lower average driver income among trip origins than Napa. The driver population here skews older than 67% of counties in California.
Mobile device location data (anonymized and aggregated)
Road sensor networks and traffic counters
Historical traffic pattern databases
Identify traffic patterns street by street and analyze the exact corridors that matter to your project.
