This page delivers traffic analytics for Fairfax County, Virginia. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Fairfax County, Virginia among 1,583 road miles divided in 37,906 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 221 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.
7,911
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
7.0%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
31.6 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.
17.5%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
44.3 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$163,767
Our data indicates an estimated average traffic volume of 7,911 vehicles per day in Fairfax County, Virginia that results in 18,791,999 vehicle-miles traveled per day (≈6.9 billion per year). The traffic stream is comprised of an average of 1 truck for every 14 vehicles. Typical time spent behind the wheel per trip is 31.6 minutes, which already accounts for delays at signals, intersections, and congestion.
Analytical insight
When compared to the Virginia state averages: Fairfax sees 48% higher average daily traffic volume than the state average (7,911 vehicles per day against 5,349), suggesting more demand on each road - a critical factor for logistics and site planning. In total volume terms, its road network carries 18,791,999 vehicle-miles traveled per day (≈6.9 billion per year), about 8.5% of Virginia's statewide total. Journey times here (31.6 minutes on average) closely track the state level. Congestion runs 5% higher than the state level, at a ratio of 17.5% - more pronounced congestion - crucial for traffic control improvement and logistics planning. Fairfax carries more traffic than 78% of counties in Virginia. 43% of counties in Virginia have a shorter average travel time than Fairfax's 31.6 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.
25,331
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
8.3%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
37.2 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.
44.2%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
43.9 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$158,523
A significant volume of traffic in Fairfax County, Virginia utilizes the highway network. The average highway carries 25,331 vehicles per day, 284% more than the average non-highway road in the same area, which carries 6,594 vehicles per day. That average covers 405 highway road miles divided in 2,666 segments (average segment length 801 ft), together carrying 10,740,525 vehicle-miles traveled per day (≈3.9 billion per year). By highway travel volume, Fairfax ranks first in Virginia. Trucks constitute 8.3% of highway traffic.
Analytical insight
The concentration of trucks on highways (8.3%) is 37% lower than the state average for similar road classifications. This indicates Fairfax serves as a primarily local traffic hub. For logistics operators, this validates the importance of local access. By truck concentration, highways here outrank 15% of counties in Virginia. By raw truck volume, Fairfax carries more highway trucks than 59% of counties in Virginia.
Non-highway traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
6,594
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
5.2%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
31.2 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.
15.5%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
44.9 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$169,039
The non-highway road network in Fairfax County, Virginia supports a substantial volume of traffic. The average non-highway road carries 6,594 vehicles per day, 74% less than the average highway in the same area, which carries 25,331 vehicles per day. That average covers 1,179 non-highway road miles divided in 35,240 segments (average segment length 177 ft), together carrying 8,051,474 vehicle-miles traveled per day (≈2.9 billion per year). Trucks constitute 5.2% of non-highway traffic.
Analytical insight
The concentration of trucks on non-highway roads is 36% lower than on highways. At 15.5%, the non-highway congestion ratio matches the state level closely. Fairfax's overall average travel time exceeds 43% of counties in Virginia. Fairfax's average driver income exceeds 98% of counties in Virginia. The driver population here skews older than 15% of counties in Virginia.
Time-of-Day & Seasonal Patterns
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–12:00 PM and PM peak 4:00 PM–7:00 PM, with volumes reaching approximately 65% higher than the daily average.
Weekend traffic:
Weekend volumes run about 22% below weekday levels.
Seasonal Fluctuation
Busy season:
April–June is the high season, with volumes +4% versus the annual average.
Lowest month:
January is the quietest month, with volumes -8% versus the annual average.
Analytical insight
In Fairfax County, Virginia, the peak hour concentrates about 7% of the day's traffic, and seasonal swing is mild at +4% in high season.
Traffic Flow Profile Comparison
Metric
Fairfax
Virginia
Average
Difference
Traffic
7,911
5,349
+47.9%
Truck % (Total Traffic)
7.0%
9.6%
-27.2%
Truck % (Highway)
8.3%
13.1%
-36.9%
Avg. Travel Time
31.6 min
31.7 min
-0.2%
Frequently Asked Questions
The average daily traffic volume is calculated at 7,911 vehicles per day, providing a baseline for daily operations and site assessment.
Fairfax's highway truck share of 8.3% is higher than 15% of counties in Virginia.
Trucks account for approximately 7.0% of the total traffic mix across all road types, with a significantly higher concentration of 8.3% on highways.
Weekday peaks occur between 7:00 AM and 12:00 PM in the morning and between 4:00 PM and 7:00 PM in the evening - about 65% above the daily average.
Drivers on Fairfax roads have a median age of 44 years, and the median household income of the neighborhoods trips originate from averages $163,767 - useful context for retail siting and customer profiling.
Approximately 37% of highway traffic and 8% of non-highway traffic consists of vehicles whose trip originates outside Fairfax County, Virginia. This indicates that a portion of highway traffic is regional pass-through, while local roads are more representative of resident and commuter activity.
The average travel time for drivers is 31.6 minutes, offering a standard metric for commute and delivery route planning.
Traffic volumes are typically 4% higher during April–June. Volumes drop to their lowest levels in January, averaging 7,316 vehicles per day - a 8% decrease from the annual average.
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)
