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Traffic | vehicles per day1,741 |
|---|---|
Trucks | 14.3% |
Average travel time | 62.2 min |
Congestion ratio | 4.8% |
Drivers’ average age | 47.2 yrs |
Drivers’ average income | $71,966 |
Our data shows 1,741 vehicles per day on the average road in Sierra County, California, and 251,980 vehicle-miles traveled per day (≈92.0 million per year) across its 69 miles of monitored roads. Freight weighs heavily here: trucks are 14.3% of traffic, against 7.8% across California.
At 1,741 vehicles per day, the average monitored road in Sierra carries 86% less traffic than the state average of 12,766, suggesting less demand on each road - very light roads: easy truck access, but little passing trade for roadside retail. Across the whole network, that travel is less than 0.1% of California's statewide total. Sierra carries less traffic than 96% of counties in California.
The average trip takes 62.2 minutes, 80% higher than the state level. Sierra additionally records the highest average travel time of any county in California - 62.2 minutes.
At 82% lower than the state level, the 4.8% congestion ratio signals smoother traffic flow - delays are rare enough to plan travel times almost to the minute.
| Traffic | vehicles per day10,591 |
|---|---|
| Trucks | 15.5% |
| Average travel time | 49.0 min |
| Congestion ratio | 24.1% |
| Drivers’ average age | 46.7 yrs |
| Drivers’ average income | $77,018 |
Highways carry the vast majority of travel in Sierra County, California, 81% of all vehicle-miles. The average highway carries 10,591 vehicles per day, 920% more than the average non-highway road in the same area, which carries 1,038 vehicles per day.
That comes from just 21% of the monitored road miles: 15 miles in 24 segments, carrying 203,147 vehicle-miles traveled per day (≈74.1 million per year).
The concentration of trucks on highways (15.5%) is 49% higher than the state average for similar road classifications. Highways here lean toward freight, so highway access is a real asset for logistics operators.
By truck concentration, highways here outrank 69% of counties in California. Sierra's highway truck count is lower than 65% of counties in California, at roughly 1,639 trucks per day.
| Traffic | vehicles per day1,038 |
|---|---|
| Trucks | 9.2% |
| Average travel time | 63.3 min |
| Congestion ratio | 3.3% |
| Drivers’ average age | 58.3 yrs |
| Drivers’ average income | $53,417 |
Local roads carry a smaller share of travel in Sierra County, California, 19% of vehicle-miles; most driving happens on highways. A typical local road sees 1,038 vehicles per day.
Spread over 54 miles and 302 segments, 79% of the road network, local roads carry a lighter load per mile: 48,834 vehicle-miles traveled per day (≈17.8 million per year). The truck share on non-highway roads is 9.2%.
The concentration of trucks on non-highway roads is 41% lower than on highways.
At 88% lower than the state level, the non-highway congestion ratio of 3.3% signals easier movement on local roads.
Sierra's average driver income is lower than 81% of counties in California. Sierra's median driver age is higher than 65% 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.
