This page delivers traffic analytics for Napa County, California. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Napa County, California among 369 road miles divided in 7,970 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 244 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.
The average number of vehicles that travel each day over any road in the road network.
6,427
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
6.9%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
33.9 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.
19.9%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
47.3 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$116,528
Our data indicates an estimated average traffic volume of 6,427 vehicles per day in Napa County, California that results in 3,100,053 vehicle-miles traveled per day (≈1.1 billion per year). The traffic stream is comprised of an average of 1 truck for every 14 vehicles. Typical time spent behind the wheel per trip is 33.9 minutes, which already accounts for delays at signals, intersections, and congestion.
Analytical insight
When compared to the California state averages: Napa's average daily traffic volume is 50% lower than the state average - 6,427 vehicles per day against 12,766 - suggesting less traffic load per road, a critical factor for logistics and site planning. Network-wide, Napa accounts for about 0.3% of California's statewide total, at 3,100,053 vehicle-miles traveled per day (≈1.1 billion per year). Journey times run 2% lower than the state level, at 33.9 minutes on average. The congestion ratio of 19.9% is 27% lower, pointing to smoother traffic flow than the state level - crucial for traffic control improvement and logistics planning. 49% of counties in California see less traffic than Napa's 6,427 vehicles per day. On travel time, Napa runs longer than 54% of counties in California.
Highway vs. Non-Highway Traffic Analysis
Highway Traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
25,073
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
8.4%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
39.3 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.
55.9%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
46.2 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$116,959
A significant volume of traffic in Napa County, California utilizes the highway network. 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. That average covers 41 highway road miles divided in 188 segments (average segment length 1,139 ft), together carrying 1,144,766 vehicle-miles traveled per day (≈418 million per year). Trucks constitute 8.4% of highway traffic.
Analytical insight
At 8.4%, highway truck share is 19% lower than the state average, marking Napa as a primarily local traffic hub - underscoring the importance of local access for logistics operators. 25% of counties in California see a lower highway truck share than Napa's 8.4%. Napa's highway truck count is higher than 39% of counties in California, at roughly 2,104 trucks per day.
Non-highway traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
5,977
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
6.1%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
33.8 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.
19.0%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
48.2 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$116,252
The non-highway road network in Napa County, California supports a substantial volume of traffic. The average non-highway road carries 5,977 vehicles per day, 76% less than the average highway in the same area, which carries 25,073 vehicles per day. That average covers 328 non-highway road miles divided in 7,782 segments (average segment length 223 ft), together carrying 1,955,287 vehicle-miles traveled per day (≈714 million per year). Trucks constitute 6.1% of non-highway traffic.
Analytical insight
The concentration of trucks on non-highway roads is 28% lower than on highways. At 28% lower than the state level, the non-highway congestion ratio of 19.0% signals easier movement on local roads. 54% of counties in California see shorter overall travel times than Napa. Trip origins here have higher average income than 79% of counties in California. Napa's median driver age is higher than 67% of counties in California.
Time-of-Day & Seasonal Patterns
Analytical insight
In Napa County, California, the peak hour concentrates about 8% of the day's traffic.
Traffic Flow Profile Comparison
Metric
Napa
California
Average
Difference
Traffic
6,427
12,766
-49.7%
Truck % (Total Traffic)
6.9%
7.8%
-10.8%
Truck % (Highway)
8.4%
10.4%
-19.2%
Avg. Travel Time
33.9 min
34.5 min
-1.6%
Frequently Asked Questions
The average daily traffic volume is calculated at 6,427 vehicles per day, providing a baseline for daily operations and site assessment.
Napa's highway truck share of 8.4% is higher than 25% of counties in California.
Weekday peaks occur between 8:00 AM and 12:00 PM in the morning and between 2:00 PM and 5:00 PM in the evening - about 82% above the daily average.
Drivers on Napa roads have a median age of 47 years, and the median household income of the neighborhoods trips originate from averages $116,528 - useful context for retail siting and customer profiling.
Trucks account for approximately 6.9% of the total traffic mix across all road types, with a significantly higher concentration of 8.4% on highways.
Approximately 33% of highway traffic and 5% of non-highway traffic consists of vehicles whose trip originates outside Napa County, California. This indicates that a portion of highway traffic is regional pass-through, while local roads are more representative of resident and commuter activity.
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)
