This page delivers traffic analytics for Sierra County, California. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Sierra County, California among 69 road miles divided in 326 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 1,119 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.
1,741
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
14.3%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
62.2 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.
4.8%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
47.2 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$71,966
Our data indicates an estimated average traffic volume of 1,741 vehicles per day in Sierra County, California that results in 251,980 vehicle-miles traveled per day (≈92.0 million per year). The traffic stream is comprised of an average of 1 truck for every 7 vehicles. Typical time spent behind the wheel per trip is 62.2 minutes, which already accounts for delays at signals, intersections, and congestion.
Analytical insight
When compared to the California state averages: Sierra's average daily traffic volume is 86% lower than the state average - 1,741 vehicles per day against 12,766 - suggesting less traffic load per road, a critical factor for logistics and site planning. Network-wide, Sierra accounts for about 0.0% of California's statewide total, at 251,980 vehicle-miles traveled per day (≈92.0 million per year). The average trip takes 62.2 minutes, 80% higher than the state level. Congestion runs 82% lower than the state level, at a ratio of 4.8% - smoother traffic flow - crucial for traffic control improvement and logistics planning. Sierra carries more traffic than 4% of counties in California. At 62.2 minutes, Sierra also has the highest average travel time 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.
10,591
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
15.5%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
49.0 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.
24.1%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
46.7 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$77,018
A significant volume of traffic in Sierra County, California utilizes the highway network. 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 average covers 15 highway road miles divided in 24 segments (average segment length 3,216 ft), together carrying 203,147 vehicle-miles traveled per day (≈74.1 million per year). Trucks constitute 15.5% of highway traffic.
Analytical insight
Highway truck concentration here runs 49% higher than the state average, at 15.5% - positioning Sierra as a significant freight corridor. For logistics operators, this validates the importance of highway access. 69% of counties in California see a lower highway truck share than Sierra's 15.5%. 35% of counties in California see fewer highway trucks per day than Sierra's roughly 1,639.
Non-highway traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
1,038
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
9.2%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
63.3 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.
3.3%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
58.3 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$53,417
The non-highway road network in Sierra County, California supports a substantial volume of traffic. The average non-highway road carries 1,038 vehicles per day, 90% less than the average highway in the same area, which carries 10,591 vehicles per day. That average covers 54 non-highway road miles divided in 302 segments (average segment length 952 ft), together carrying 48,834 vehicle-miles traveled per day (≈17.8 million per year). Trucks constitute 9.2% of non-highway traffic.
Analytical insight
The concentration of trucks on non-highway roads is 41% lower than on highways. Non-highway congestion (3.3%) runs 88% lower than the state average, pointing to smoother local traffic flow. Sierra also posts the highest overall average travel time in California - 62.2 minutes. Sierra's average driver income exceeds 19% of counties in California. Sierra's median driver age is higher than 65% of counties in California.
Time-of-Day & Seasonal Patterns
Analytical insight
In Sierra County, California, the peak hour concentrates about 7% of the day's traffic.
Traffic Flow Profile Comparison
Metric
Sierra
California
Average
Difference
Traffic
1,741
12,766
-86.4%
Truck % (Total Traffic)
14.3%
7.8%
+83.5%
Truck % (Highway)
15.5%
10.4%
+49.1%
Avg. Travel Time
62.2 min
34.5 min
+80.5%
Frequently Asked Questions
The average daily traffic volume is calculated at 1,741 vehicles per day, providing a baseline for daily operations and site assessment.
Yes - at 62.2 minutes, Sierra has the highest average travel time of any county in California.
Weekday peaks occur between 7:00 AM and 12:00 PM in the morning and between 1:00 PM and 6:00 PM in the evening - about 77% above the daily average.
Trucks account for approximately 14.3% of the total traffic mix across all road types, with a significantly higher concentration of 15.5% on highways.
The average travel time for drivers is 62.2 minutes, offering a standard metric for commute and delivery route planning.
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)
