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Traffic heat map of Prince William County, Virginia: 792 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 95 and Purple Heart Bridge

Prince William County, Virginia Traffic Counts

Our Prince William County, Virginia traffic data covers 16,512 road segments over 792 road miles, with an average segment of just 253 ft. It is one of the top 3 counties in Virginia for highway travel volume. Whether you are evaluating a new retail location, planning routes or assessing infrastructure, these numbers replace guesswork.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
Updated:
September 29, 2026
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Total Traffic Volume & Performance in Prince William County, Virginia

Traffic

The average number of vehicles that travel each day over any road in the road network.

vehicles per day7,987
Trucks

The percentage of the total traffic volume composed of heavy vehicles.

7.5%
Average travel time

The average time of travel averaged among all vehicles traveling on the road network.

30.4 min
Congestion ratio

The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.

19.0%
Drivers’ average age

Average age of residents in the geographic areas where the vehicle trips originated.

43.5 yrs
Drivers’ average income

Average income of residents in the geographic areas where the vehicle trips originated.

$148,629

The average monitored road in Prince William County, Virginia carries 7,987 vehicles per day. Across its 792 miles of monitored roads, that adds up to 9,275,310 vehicle-miles traveled per day (≈3.4 billion per year). About 1 in 13 vehicles is a truck, fewer than the 1 in 10 across Virginia.

Busier roads than 79% of counties in Virginia

Prince William's average daily traffic volume is 49% higher than the state average - 7,987 vehicles per day against 5,349 - suggesting more traffic load per road - a busier backdrop for retail sites, at the cost of slower access. Across the whole network, that travel is about 4.2% of Virginia's statewide total. By volume, Prince William's 7,987 vehicles per day outpaces 79% of counties in Virginia.

The average trip takes 30.4 minutes, on par with the state level. On travel time, Prince William runs shorter than 72% of counties in Virginia.

The congestion ratio of 19.0% runs slightly higher than the state level (13% higher) - crucial for traffic control improvement and logistics planning.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Prince William County, Virginia

Trafficvehicles per day24,236
Trucks9.9%
Average travel time39.7 min
Congestion ratio39.8%
Drivers’ average age43.6 yrs
Drivers’ average income$149,601

A little more than half of the driving in Prince William County, Virginia happens on highways: 56% of all vehicle-miles. The average highway carries 24,236 vehicles per day, 300% more than the average non-highway road in the same area, which carries 6,060 vehicles per day.

Highways make up 25% of the monitored road miles (198 miles, 1,750 segments), so they carry more than their share: 5,161,499 vehicle-miles traveled per day (≈1.9 billion per year).

By highway travel volume, that ranks Prince William in the top 3 counties in Virginia.

More highway trucks than 67% of counties in Virginia

The concentration of trucks on highways (9.9%) is 25% lower than the state average for similar road classifications. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.

63% of counties in Virginia see a higher highway truck share than Prince William's 9.9%. Prince William's highway truck count is higher than 67% of counties in Virginia, at roughly 2,395 trucks per day.

non-highway traffic icon

Non-highway Traffic in Prince William County, Virginia

Trafficvehicles per day6,060
Trucks4.6%
Average travel time29.3 min
Congestion ratio16.5%
Drivers’ average age43.3 yrs
Drivers’ average income$147,756

A significant share of driving in Prince William County, Virginia, 44% of vehicle-miles, happens on local roads. On the average non-highway road, that comes to 6,060 vehicles per day.

Spread over 594 miles and 14,762 segments, 75% of the road network, local roads carry a lighter load per mile: 4,113,811 vehicle-miles traveled per day (≈1.5 billion per year). About 1 in 22 vehicles on non-highway roads is a truck (4.6%).

Drivers from higher-income areas than 97% of counties in Virginia

Non-highway roads carry a truck concentration that's 54% lower than the highway network.

Non-highway congestion (16.5%) runs slightly higher than the state level (5% higher).

97% of counties in Virginia see lower average driver income among trip origins than Prince William. Prince William's median driver age is lower than 91% of counties in Virginia.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–9:00 AM and PM peak 4:00 PM–7:00 PM, with volumes reaching approximately 67% higher than the daily average.
Weekend traffic:
Weekends are much quieter: volumes run about 21% below weekday levels, the signature of a commute-driven road network.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
April–June is the high season, with volumes +5% versus the annual average.
Lowest month:
January is the quietest month, with volumes -9% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Prince William County, Virginia, the peak hour concentrates about 7% of the day's traffic, and there is a noticeable seasonal swing of +5% in high season.

Prince William County vs. Virginia Traffic Comparison

Prince William County's biggest difference from the Virginia average is its average daily traffic per road, 49% above it. Its highway truck share, by contrast, is 25% below.

MetricPrince William CountyVirginia averageDifference
Traffic7,9875,349+49.3%
Truck % (Total Traffic)7.5%9.6%-21.4%
Truck % (Highway)9.9%13.1%-24.6%
Avg. Travel Time30.4 min31.7 min-3.9%

How Prince William County compares

Prince William County against nearby counties and cities

Nothing in this table sets Prince William County sharply apart from the 4 areas nearest to it, though it has the third busiest roads of the five.

Prince William County and the 4 nearest county-level areas by centroid distance, with the Virginia average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Prince William County7,9877.5%9,275,31030.4 min19.0%
Manassas Park City, Virginia7,6944.5%75,87332.9 min14.2%
Manassas City, Virginia13,2844.1%399,70039.6 min26.2%
Fairfax County, Virginia7,9117.0%18,791,99931.6 min17.5%
Fairfax City, Virginia9,6616.6%300,90532.2 min13.1%
Virginia average5,3499.6%N/A31.7 min16.8%

Prince William County ranked within Virginia

On highway travel volume, Prince William County is among the three highest county-level areas in Virginia.

Prince William County ranked among 133 county-level areas in Virginia (1 = highest); measures without data in every county rank a smaller field, down to 118.
MeasurePrince William CountyVirginia rank
Traffic volume (AADT)7,987#29 of 133
Highway vehicle-miles per day5,161,499#3 of 118
Truck share on highways9.9%#75 of 118
Highway trucks per day2,395#40 of 118
Average travel time30.4 min#95 of 133
Average driver income$148,629#5 of 133
Average driver age43.5 yrs#121 of 133

Prince William County ranks #3 of 118 on highway travel volume but #121 of 133 on average driver age - the two describe the same roads and are worth reading together rather than either on its own.

Busiest roads in Prince William County, Virginia

On their busiest stretches, the three busiest roads in Prince William County carry 100,691 vehicles a day on average, 12.6 times the typical road in the county (7,987).

I 95 leads with 149,612 vehicles a day, 17,031 of them trucks (11.4%). No other road comes close: Purple Heart Bridge, in second place, carries 79,031. It also carries the most trucks.

Trips using I 95 are long: a median of 46.5 minutes against 30.4 county-wide, the mark of a through route.

Trucks make up 13.3% of traffic on I 66, against 7.5% across all roads in the county.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 95Motorway · 149,612vehicles17,031trucks · 11.4%
Road class
Motorway
Congestion ratio
115.1%
Median trip time
46.5 min
Drivers’ median age
43.3 yrs
Drivers’ average income
$130,580

Travel on I 95's busiest stretch runs 115% over free-flow time, against 19% across the county, so expect slower peak hours.

2Purple Heart BridgeMotorway · 79,031vehicles7,826trucks · 9.9%
Road class
Motorway
Median trip time
44.6 min
Drivers’ median age
43.4 yrs
Drivers’ average income
$132,583

Drivers on Purple Heart Bridge are on long journeys, a median 44.6 minutes against 30.4 county-wide: a through route more than a local street.

3I 66Motorway · 73,431vehicles9,795trucks · 13.3%
Road class
Motorway
Congestion ratio
42.7%
Median trip time
40.1 min
Drivers’ median age
44.4 yrs
Drivers’ average income
$155,916

I 66 is one of the more congested roads here: trips take 43% longer than at free-flow speed, against 19% county-wide.

4Centreville RoadTrunk road · 62,584vehicles2,374trucks · 3.8%
Road class
Trunk road
Median trip time
44.4 min
Drivers’ median age
42.6 yrs
Drivers’ average income
$112,463

Centreville Road carries through traffic: the median trip using it lasts 44.4 minutes, against 30.4 for the county.

5Lee HighwayTrunk road · 47,206vehicles4,123trucks · 8.7%
Road class
Trunk road
Median trip time
37.2 min
Drivers’ median age
45.7 yrs
Drivers’ average income
$153,710

At 5.9 times the county average, Lee Highway draws drivers from neighborhoods averaging $153,710 in household income.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 95Motorway · #1 by traffic149,612vehicles17,031trucks · 11.4%
2I 66Motorway · #3 by traffic73,431vehicles9,795trucks · 13.3%
3Purple Heart BridgeMotorway · #2 by traffic79,031vehicles7,826trucks · 9.9%
4Prince William ParkwayMotorway · 36,950vehicles4,538trucks · 12.3%
Road class
Motorway
Median trip time
38.6 min
Drivers’ median age
44.5 yrs
Drivers’ average income
$163,305

Prince William Parkway carries 4.6 times the county average on its busiest stretch, where the median trip lasts 38.6 minutes.

5Lee HighwayTrunk road · #5 by traffic47,206vehicles4,123trucks · 8.7%
How to read these road counts
  • The first number is AADT, annual average daily traffic: the vehicles passing a point on an average day, both directions combined and trucks included. On a divided highway both carriageways are added together.
  • Traffic changes along a road, with more near interchanges and towns and less in open country. Every figure for a road describes its busiest stretch in the county, so the two rankings show the same numbers for the same road.
  • The second number is the trucks on that stretch, a part of its AADT. The bar splits the AADT into cars and light vehicles (blue) and trucks (amber).
  • See segment-level AADT for any road on TrafficZoom.

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)

Road sensor networks and traffic counters

Historical traffic pattern databases

Public traffic count programs published by the

Prince WilliamDepartment of Transportation

Demographic Baseline for O-D Modeling

U.S. Census Bureau
All metrics represent estimates based on statistical modeling and are intended for strategic planning purposes.
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Data current as of:
Q3 2026

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Counties near Prince William County

The same traffic breakdown for the areas closest to Prince William County, Virginia.

Need segment-level traffic data?

Identify traffic patterns street by street and analyze the exact corridors that matter to your project.