
Total Traffic Volume & Performance in San Joaquin County, California
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day8,641 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 11.7% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 32.8 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. | 23.3% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 43.0 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $106,425 |
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A typical monitored road in San Joaquin County, California sees 8,641 vehicles per day, while its 1,624 miles of monitored roads together handle 20,111,410 vehicle-miles traveled per day (≈7.3 billion per year). At 11.7%, the truck share runs above the 7.8% across California: about 1 in 9 vehicles.
Traffic 32% below the California average
San Joaquin's average daily traffic volume is 32% lower than the state average - 8,641 vehicles per day against 12,766 - suggesting less traffic load per road - lighter roads for freight, but less passing trade for roadside retail. In total volume terms, its road network carries about 2.2% of California's statewide total of vehicle-miles. San Joaquin carries more traffic than 63% of counties in California.
At 32.8 minutes, the average travel time matches the state level closely. 65% of counties in California have a longer average travel time than San Joaquin's 32.8 minutes.
At 15% lower than the state level, the 23.3% congestion ratio signals smoother traffic flow - relevant for traffic control and delivery planning.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in San Joaquin County, California
| Traffic | vehicles per day36,604 |
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| Trucks | 16.0% |
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| Average travel time | 45.8 min |
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| Congestion ratio | 65.6% |
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| Drivers’ average age | 43.1 yrs |
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| Drivers’ average income | $109,779 |
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Highways carry more than half of all travel in San Joaquin County, California (57% of vehicle-miles). The average highway carries 36,604 vehicles per day, 379% more than the average non-highway road in the same area, which carries 7,636 vehicles per day.
With 19% of the road miles (309 miles in 1,112 segments), highways punch above their length, carrying 11,412,144 vehicle-miles traveled per day (≈4.2 billion per year).
80% of counties in California move less traffic on their highways.
More highway trucks than 98% of counties in California
The concentration of trucks on highways (16.0%) is 55% higher than the state average for similar road classifications. Highways here lean toward freight, so highway access is a real asset for logistics operators.
San Joaquin's highway truck share (16.0%) is higher than 73% of counties in California. 98% of counties in California see fewer highway trucks per day than San Joaquin's roughly 5,871.

Non-highway Traffic in San Joaquin County, California
| Traffic | vehicles per day7,636 |
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| Trucks | 5.9% |
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| Average travel time | 32.4 min |
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| Congestion ratio | 21.8% |
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| Drivers’ average age | 42.9 yrs |
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| Drivers’ average income | $103,645 |
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Local roads carry a significant share of travel in San Joaquin County, California: 43% of all vehicle-miles. On the average non-highway road, that comes to 7,636 vehicles per day.
Local roads make up 81% of the monitored road miles (1,314 miles in 30,939 segments) but carry less than their share of travel: 8,699,267 vehicle-miles traveled per day (≈3.2 billion per year). The truck share on non-highway roads is 5.9%.
Younger drivers than 75% of counties in California
Compared to highways, non-highway routes see 63% fewer trucks by share.
The non-highway congestion ratio of 21.8% is 18% lower than the state level, suggesting more efficient local mobility than the state average.
Trip origins here have higher average income than 70% of counties in California. 75% of counties in California have an older driver population than San Joaquin.