This page delivers traffic analytics for San Diego County, California. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for San Diego County, California among 4,209 road miles divided in 107,646 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 206 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.
14,311
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
5.5%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
30.0 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.
31.4%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
40.9 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$119,432
Our data indicates an estimated average traffic volume of 14,311 vehicles per day in San Diego County, California that results in 85,105,406 vehicle-miles traveled per day (≈31.1 billion per year). The traffic stream is comprised of an average of 1 truck for every 18 vehicles. Typical time spent behind the wheel per trip is 30.0 minutes, which already accounts for delays at signals, intersections, and congestion.
Analytical insight
When compared to the California state averages: San Diego's average daily traffic volume is 12% higher than the state average - 14,311 vehicles per day against 12,766 - suggesting more traffic load per road, a critical factor for logistics and site planning. Across the whole network that adds up to 85,105,406 vehicle-miles traveled per day (≈31.1 billion per year), roughly 9.2% of California's statewide total. At 30.0 minutes, the average travel time is 13% lower than the state level. The congestion ratio of 31.4% is 14% higher, pointing to more pronounced congestion than the state level - crucial for traffic control improvement and logistics planning. San Diego carries more traffic than 95% of counties in California. 2% of counties in California have a shorter average travel time than San Diego's 30.0 minutes.
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.
56,292
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
6.6%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
32.4 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.
70.6%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
40.8 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$115,866
A significant volume of traffic in San Diego County, California utilizes the highway network. The average highway carries 56,292 vehicles per day, 339% more than the average non-highway road in the same area, which carries 12,818 vehicles per day. That average covers 833 highway road miles divided in 3,698 segments (average segment length 1,189 ft), together carrying 47,913,432 vehicle-miles traveled per day (≈17.5 billion per year). By highway travel volume, that ranks San Diego in the top 3 counties in California. Trucks constitute 6.6% of highway traffic.
Analytical insight
Highway truck concentration here runs 36% lower than the state average, at 6.6% - positioning San Diego as a primarily local traffic hub. For logistics operators, this validates the importance of local access. By truck concentration, highways here outrank 8% of counties in California. By raw truck volume, San Diego carries more highway trucks than 69% of counties in California.
Non-highway traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
12,818
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
4.0%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
29.9 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.
30.0%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
41.1 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$122,819
The non-highway road network in San Diego County, California supports a substantial volume of traffic. The average non-highway road carries 12,818 vehicles per day, 77% less than the average highway in the same area, which carries 56,292 vehicles per day. That average covers 3,376 non-highway road miles divided in 103,948 segments (average segment length 171 ft), together carrying 37,191,974 vehicle-miles traveled per day (≈13.6 billion per year). Trucks constitute 4.0% of non-highway traffic.
Analytical insight
Compared to highways, non-highway routes see 39% fewer trucks by share. At 13% higher than the state level, the non-highway congestion ratio of 30.0% signals more friction on local roads. 2% of counties in California see shorter overall travel times than San Diego. 82% of counties in California see lower average driver income among trip origins than San Diego. San Diego's median driver age is higher than 5% of counties in California.
Time-of-Day & Seasonal Patterns
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–9:00 AM and PM peak 3:00 PM–9:00 PM, with volumes reaching approximately 71% higher than the daily average.
Weekend traffic:
Weekend volumes run about 17% below weekday levels.
Seasonal Fluctuation
Busy season:
September–November is the high season, with volumes +19% versus the annual average.
Lowest month:
May is the quietest month, with volumes -14% versus the annual average.
Analytical insight
In San Diego County, California, the peak hour concentrates about 7% of the day's traffic, and seasonal swing is pronounced at +19% in high season.
Traffic Flow Profile Comparison
Metric
San Diego
California
Average
Difference
Traffic
14,311
12,766
+12.1%
Truck % (Total Traffic)
5.5%
7.8%
-29.3%
Truck % (Highway)
6.6%
10.4%
-36.2%
Avg. Travel Time
30.0 min
34.5 min
-13.0%
Frequently Asked Questions
The average daily traffic volume is calculated at 14,311 vehicles per day, providing a baseline for daily operations and site assessment.
San Diego carries more highway trucks by raw volume than 69% of counties in California, at roughly 3,727 per day.
Drivers on San Diego roads have a median age of 41 years, and the median household income of the neighborhoods trips originate from averages $119,432 - useful context for retail siting and customer profiling.
Weekday peaks occur between 7:00 AM and 9:00 AM in the morning and between 3:00 PM and 9:00 PM in the evening - about 71% above the daily average.
Traffic volumes are typically 19% higher during September–November. Volumes drop to their lowest levels in May, averaging 12,315 vehicles per day - a 14% decrease from the annual average.
Approximately 3% of highway traffic and 0% of non-highway traffic consists of vehicles whose trip originates outside San Diego County, California. This indicates that a portion of highway traffic is regional pass-through, while local roads are more representative of resident and commuter activity.
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)
