
Total Traffic Volume & Performance in Solano County, California
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day10,208 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 8.2% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 32.4 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. | 25.5% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 44.0 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $113,116 |
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A typical monitored road in Solano County, California sees 10,208 vehicles per day, while its 926 miles of monitored roads together handle 15,382,407 vehicle-miles traveled per day (≈5.6 billion per year). Trucks are 8.2% of traffic, close to the 7.8% across California.
Busier roads than 75% of counties in California
At 10,208 vehicles per day, the average monitored road in Solano carries 20% less traffic than the state average of 12,766, suggesting less demand on each road - a factor worth weighing in site selection and logistics planning. Network-wide, Solano accounts for about 1.7% of California's statewide total of vehicle-miles. 75% of counties in California see less traffic than Solano's 10,208 vehicles per day.
The average trip takes 32.4 minutes, 6% lower than the state level. 73% of counties in California have a longer average travel time than Solano's 32.4 minutes.
Congestion is somewhat lower than the state level, at a ratio of 25.5% (7% lower).
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Solano County, California
| Traffic | vehicles per day41,104 |
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| Trucks | 10.0% |
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| Average travel time | 50.6 min |
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| Congestion ratio | 65.3% |
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| Drivers’ average age | 43.7 yrs |
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| Drivers’ average income | $113,811 |
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A little more than half of the driving in Solano County, California happens on highways: 70% of all vehicle-miles. The average highway carries 41,104 vehicles per day, 379% more than the average non-highway road in the same area, which carries 8,586 vehicles per day.
With 26% of the road miles (240 miles in 944 segments), highways punch above their length, carrying 10,717,920 vehicle-miles traveled per day (≈3.9 billion per year).
76% of counties in California move less traffic on their highways.
More highway trucks than 82% of counties in California
At 10.0%, the highway truck share matches the state average for similar road classifications. The highway traffic mix is typical for California: neither freight- nor commuter-dominated.
By truck concentration, highways here trail 63% of counties in California. 82% of counties in California see fewer highway trucks per day than Solano's roughly 4,115.

Non-highway Traffic in Solano County, California
| Traffic | vehicles per day8,586 |
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| Trucks | 4.2% |
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| Average travel time | 31.4 min |
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| Congestion ratio | 23.4% |
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| Drivers’ average age | 44.4 yrs |
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| Drivers’ average income | $112,248 |
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A significant share of driving in Solano County, California, 30% of vehicle-miles, happens on local roads. On the average non-highway road, that comes to 8,586 vehicles per day.
Local roads make up 74% of the monitored road miles (687 miles in 17,972 segments) but carry less than their share of travel: 4,664,486 vehicle-miles traveled per day (≈1.7 billion per year). About 1 in 24 vehicles on non-highway roads is a truck (4.2%).
Drivers from higher-income areas than 77% of counties in California
The concentration of trucks on non-highway roads is 58% lower than on highways.
Non-highway congestion (23.4%) runs slightly lower than the state level (12% lower).
Solano's average driver income is higher than 77% of counties in California. 58% of counties in California have an older driver population than Solano.