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TrafficThe average number of vehicles that travel each day over any road in the road network. | vehicles per day10,302 |
|---|---|
TrucksThe percentage of the total traffic volume composed of heavy vehicles. | 9.8% |
Average travel timeThe average time of travel averaged among all vehicles traveling on the road network. | 33.1 min |
Congestion ratioThe rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network. | 27.2% |
Drivers’ average ageAverage age of residents in the geographic areas where the vehicle trips originated. | 43.2 yrs |
Drivers’ average incomeAverage income of residents in the geographic areas where the vehicle trips originated. | $88,730 |
A typical monitored road in Stanislaus County, California sees 10,302 vehicles per day, while its 1,059 miles of monitored roads together handle 11,775,215 vehicle-miles traveled per day (≈4.3 billion per year). Trucks are 9.8% of traffic, more than the 7.8% across California.
At 10,302 vehicles per day, the average monitored road in Stanislaus carries 19% 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, Stanislaus accounts for about 1.3% of California's statewide total of vehicle-miles. 77% of counties in California see less traffic than Stanislaus's 10,302 vehicles per day.
At 33.1 minutes, the average travel time matches the state level closely. 60% of counties in California have a longer average travel time than Stanislaus's 33.1 minutes.
At 27.2%, the congestion ratio matches the state level closely.
| Traffic | vehicles per day31,476 |
|---|---|
| Trucks | 16.1% |
| Average travel time | 42.8 min |
| Congestion ratio | 60.0% |
| Drivers’ average age | 42.4 yrs |
| Drivers’ average income | $89,293 |
Highways carry a significant share of travel in Stanislaus County, California: 41% of all vehicle-miles. The average highway carries 31,476 vehicles per day, 220% more than the average non-highway road in the same area, which carries 9,845 vehicles per day.
Yet highways are only 12% of the road network, 124 miles in 449 segments, so each mile of them is 3.5 times as busy as the average road mile.
63% of counties in California move less traffic on their highways.
At 16.1%, highway truck share is 55% higher than the state average. Highways here lean toward freight, so highway access is a real asset for logistics operators.
75% of counties in California see a lower highway truck share than Stanislaus's 16.1%. Stanislaus also moves the highest raw count of highway trucks in California, at roughly 6,315 per day.
| Traffic | vehicles per day9,845 |
|---|---|
| Trucks | 5.4% |
| Average travel time | 32.9 min |
| Congestion ratio | 26.5% |
| Drivers’ average age | 43.5 yrs |
| Drivers’ average income | $88,516 |
Local roads carry more than half of all travel in Stanislaus County, California (59% of vehicle-miles). On the average non-highway road, that comes to 9,845 vehicles per day.
Local roads make up 88% of the monitored road miles (935 miles in 20,806 segments) but carry less than their share of travel: 6,918,809 vehicle-miles traveled per day (≈2.5 billion per year). About 1 in 18 vehicles on non-highway roads is a truck (5.4%).
Compared to highways, non-highway routes see 66% fewer trucks by share.
Non-highway congestion here (26.5%) closely tracks the state average.
Stanislaus's average driver income is higher than 51% of counties in California. The driver population here skews younger than 70% of counties in California.
The highway truck share sets Stanislaus County apart: 55% above the California average. Its truck share is also 27% above.
| Metric | Stanislaus County | California average | Difference |
|---|---|---|---|
| Traffic | 10,302 | 12,766 | -19.3% |
| Truck % (Total Traffic) | 9.8% | 7.8% | +26.6% |
| Truck % (Highway) | 16.1% | 10.4% | +55.2% |
| Avg. Travel Time | 33.1 min | 34.5 min | -4.0% |
Compared with its 4 closest neighbours, Stanislaus County is 36.7% more congested; it has the second busiest roads of the five.
| Area | Average daily traffic | Truck share | Daily vehicle-miles | Average travel time | Congestion ratio |
|---|---|---|---|---|---|
| Stanislaus County | 10,302 | 9.8% | 11,775,215 | 33.1 min | 27.2% |
| Merced County, California | 5,648 | 16.6% | 7,127,206 | 35.9 min | 15.7% |
| San Joaquin County, California | 8,641 | 11.7% | 20,111,410 | 32.8 min | 23.3% |
| Calaveras County, California | 3,226 | 6.8% | 907,925 | 31.8 min | 13.2% |
| Santa Clara County, California | 13,366 | 5.5% | 42,004,951 | 32.0 min | 27.4% |
| California average | 12,766 | 7.8% | N/A | 34.5 min | 27.4% |
Stanislaus County posts the highest highway truck volume of any county-level area in California.
| Measure | Stanislaus County | California rank |
|---|---|---|
| Traffic volume (AADT) | 10,302 | #14 of 58 |
| Highway vehicle-miles per day | 4,856,406 | #20 of 52 |
| Truck share on highways | 16.1% | #14 of 52 |
| Highway trucks per day | 5,071 | #1 of 52 |
| Average travel time | 33.1 min | #35 of 58 |
| Average driver income | $88,730 | #29 of 58 |
| Average driver age | 43.2 yrs | #41 of 58 |
Traffic concentrates on a few corridors: the three busiest roads average 72,286 vehicles a day, against 10,302 on the average road in Stanislaus County.
CA 99 leads with 125,381 vehicles a day, 15,224 of them trucks (12.1%). No other road comes close: Briggsmore Avenue, in second place, carries 47,237. It also carries the most trucks.
William Elton Brown Freeway carries longer journeys than most roads here, with a median trip of 80.1 minutes against 33.1 county-wide.
Trucks make up 28.1% of traffic on William Elton Brown Freeway and 26.6% on Side Freeway, against 9.8% across all roads in the county.
Drivers on William Elton Brown Freeway come from neighborhoods with an average household income of $148,723, 68% above the county average of $88,730.
Travel on CA 99's busiest stretch runs 90% over free-flow time, against 27% across the county, so expect slower peak hours.
Briggsmore Avenue is one of the more congested roads here: trips take 114% longer than at free-flow speed, against 27% county-wide.
Side Freeway carries through traffic: the median trip using it lasts 62.8 minutes, against 33.1 for the county.
Kiernan Avenue carries 4.1 times the county average on its busiest stretch, where the median trip lasts 30.0 minutes.
At 3.6 times the county average, Claribel Road draws drivers from neighborhoods averaging $112,546 in household income.
William Elton Brown Freeway carries 39% more than the county average at its busiest, 4,032 of them trucks (28.1%, above the county-wide 9.8%).
Maze Boulevard leans on freight: 2,938 trucks a day, 16.5% of its traffic against 9.8% county-wide.
Drivers on CA 132 are on long journeys, a median 51.2 minutes against 33.1 county-wide: a through route more than a local street.
The average monitored road in Stanislaus carries 10,302 vehicles per day, 19% less than the California average of 12,766.
Yes - Stanislaus carries the highest raw volume of highway trucks of any county in California, at roughly 6,315 trucks per day.
Trucks make up about 9.8% of all traffic in Stanislaus County, California, rising to 16.1% on highways, where long-haul freight concentrates.
The average trip in Stanislaus takes 33.1 minutes, about the same as the California average, delays at signals and congestion included.
Drivers on Stanislaus roads have a median age of 43 years, and the median household income of the neighborhoods trips originate from averages $88,730, 20% below the California average.
Weekday traffic has two busy windows: a long morning plateau from 7:00 AM to 12:00 PM and a long afternoon plateau from 2:00 PM to 9:00 PM - about 66% above the daily average.
Approximately 28% of highway traffic and 3% of non-highway traffic consists of vehicles whose trip originates outside Stanislaus County, California. Even highway traffic is mostly local, so these roads mainly serve residents and commuters.
CA 99 carries the most, 125,381 vehicles per day on its busiest stretch, followed by Briggsmore Avenue (47,237), Side Freeway (44,240), Kiernan Avenue (41,945), Claribel Road (36,958). Figures are AADT, both directions combined.
CA 99, with about 15,224 trucks per day on its busiest stretch, 12.1% of its 125,381 vehicles.
About 125,381 vehicles per day in both directions on its busiest stretch, including 15,224 trucks (12.1%). Traffic is lower on its quieter stretches; TrafficZoom shows the count for every segment.

Mobile device location data (anonymized and aggregated)

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Historical traffic pattern databases
The same traffic breakdown for the areas closest to Stanislaus County, California.
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