This page delivers traffic analytics for Contra Costa County, California. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Contra Costa County, California among 1,406 road miles divided in 34,043 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 218 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.
11,938
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
6.1%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
30.6 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.
31.6%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
45.6 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$143,225
Our data indicates an estimated average traffic volume of 11,938 vehicles per day in Contra Costa County, California that results in 25,822,583 vehicle-miles traveled per day (≈9.4 billion per year). The traffic stream is comprised of an average of 1 truck for every 16 vehicles. Typical time spent behind the wheel per trip is 30.6 minutes, which already accounts for delays at signals, intersections, and congestion.
Analytical insight
When compared to the California state averages: At 11,938 vehicles per day, the average monitored road in Contra Costa carries 6% less traffic than the state average of 12,766 vehicles per day - a critical factor for logistics and site planning. Across the whole network that adds up to 25,822,583 vehicle-miles traveled per day (≈9.4 billion per year), roughly 2.8% of California's statewide total. Journey times run 11% lower than the state level, at 30.6 minutes on average. Congestion runs 15% higher than the state level, at a ratio of 31.6% - more pronounced congestion - crucial for traffic control improvement and logistics planning. By volume, Contra Costa's 11,938 vehicles per day outpaces 86% of counties in California. On travel time, Contra Costa runs longer than 5% of counties 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.
46,341
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
7.6%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
39.3 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.
71.7%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
45.4 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$138,483
A significant volume of traffic in Contra Costa County, California utilizes the highway network. The average highway carries 46,341 vehicles per day, 360% more than the average non-highway road in the same area, which carries 10,071 vehicles per day. That average covers 274 highway road miles divided in 1,752 segments (average segment length 826 ft), together carrying 15,002,388 vehicle-miles traveled per day (≈5.5 billion per year). 84% of counties in California move less traffic on their highways. Trucks constitute 7.6% of highway traffic.
Analytical insight
The concentration of trucks on highways (7.6%) is 26% lower than the state average for similar road classifications. This indicates Contra Costa serves as a primarily local traffic hub. For logistics operators, this validates the importance of local access. By truck concentration, highways here outrank 14% of counties in California. By raw truck volume, Contra Costa carries more highway trucks than 76% 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.
10,071
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.
30.1 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.
29.4%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
45.9 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$148,303
The non-highway road network in Contra Costa County, California supports a substantial volume of traffic. The average non-highway road carries 10,071 vehicles per day, 78% less than the average highway in the same area, which carries 46,341 vehicles per day. That average covers 1,132 non-highway road miles divided in 32,291 segments (average segment length 185 ft), together carrying 10,820,194 vehicle-miles traveled per day (≈3.9 billion per year). Trucks constitute 4.0% of non-highway traffic.
Analytical insight
The concentration of trucks on non-highway roads is 47% lower than on highways. The non-highway congestion ratio of 29.4% is 11% higher than the state level, suggesting slower local mobility than the state average. Overall, average travel time here is longer than 5% of counties in California. Contra Costa's average driver income exceeds 91% of counties in California. 56% of counties in California have a younger driver population than Contra Costa.
Time-of-Day & Seasonal Patterns
Analytical insight
In Contra Costa County, California, the peak hour concentrates about 7% of the day's traffic.
Traffic Flow Profile Comparison
Metric
Contra Costa
California
Average
Difference
Traffic
11,938
12,766
-6.5%
Truck % (Total Traffic)
6.1%
7.8%
-21.2%
Truck % (Highway)
7.6%
10.4%
-26.4%
Avg. Travel Time
30.6 min
34.5 min
-11.4%
Frequently Asked Questions
The average daily traffic volume is calculated at 11,938 vehicles per day, providing a baseline for daily operations and site assessment.
Contra Costa carries more traffic than 86% of counties in California, averaging 11,938 vehicles per day.
The average travel time for drivers is 30.6 minutes, offering a standard metric for commute and delivery route planning.
Drivers on Contra Costa roads have a median age of 46 years, and the median household income of the neighborhoods trips originate from averages $143,225 - useful context for retail siting and customer profiling.
Trucks account for approximately 6.1% of the total traffic mix across all road types, with a significantly higher concentration of 7.6% on highways.
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.
Approximately 14% of highway traffic and 1% of non-highway traffic consists of vehicles whose trip originates outside Contra Costa 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)
