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Traffic heat map of Guilford County, North Carolina: 1,395 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 40 and I 85

Guilford County, North Carolina Traffic Counts

Our Guilford County, North Carolina traffic data covers 40,179 road segments over 1,395 road miles, with an average segment of just 183 ft. It is one of the top 3 counties in North Carolina 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 Guilford County, North Carolina

Traffic

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

vehicles per day7,231
Trucks

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

8.9%
Average travel time

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

31.8 min
Congestion ratio

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

18.3%
Drivers’ average age

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

44.7 yrs
Drivers’ average income

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

$79,867

A typical monitored road in Guilford County, North Carolina sees 7,231 vehicles per day, while its 1,395 miles of monitored roads together handle 14,395,706 vehicle-miles traveled per day (≈5.3 billion per year). About 1 in 11 vehicles is a truck, in line with North Carolina (8.7%).

Busier roads than 83% of counties in North Carolina

Guilford's average daily traffic volume is 14% higher than the state average - 7,231 vehicles per day against 6,332 - a critical factor for logistics and site planning. Across the whole network, that travel is about 5.3% of North Carolina's statewide total. By volume, Guilford's 7,231 vehicles per day outpaces 83% of counties in North Carolina.

At 31.8 minutes, the average travel time matches the state level closely. Its average travel time of 31.8 minutes is shorter than 56% of counties in North Carolina.

The congestion ratio of 18.3% is in line with the state level.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Guilford County, North Carolina

Trafficvehicles per day22,101
Trucks11.9%
Average travel time38.6 min
Congestion ratio37.1%
Drivers’ average age45.3 yrs
Drivers’ average income$77,347

Highways carry more than half of all travel in Guilford County, North Carolina (61% of vehicle-miles). The average highway carries 22,101 vehicles per day, 246% more than the average non-highway road in the same area, which carries 6,385 vehicles per day.

Highways make up 29% of the monitored road miles (399 miles, 2,161 segments), so they carry more than their share: 8,827,410 vehicle-miles traveled per day (≈3.2 billion per year).

By highway travel volume, that ranks Guilford in the top 3 counties in North Carolina.

More highway trucks than 84% of counties in North Carolina

The concentration of trucks on highways (11.9%) is in line with the state average for similar road classifications. The highway traffic mix is typical for North Carolina: neither freight- nor commuter-dominated.

52% of counties in North Carolina see a higher highway truck share than Guilford's 11.9%. 84% of counties in North Carolina see fewer highway trucks per day than Guilford's roughly 2,626.

non-highway traffic icon

Non-highway Traffic in Guilford County, North Carolina

Trafficvehicles per day6,385
Trucks4.2%
Average travel time31.4 min
Congestion ratio17.2%
Drivers’ average age44.1 yrs
Drivers’ average income$82,640

A significant share of driving in Guilford County, North Carolina, 39% of vehicle-miles, happens on local roads. On the average non-highway road, that comes to 6,385 vehicles per day.

Local roads make up 71% of the monitored road miles (996 miles in 38,018 segments) but carry less than their share of travel: 5,568,296 vehicle-miles traveled per day (≈2.0 billion per year). About 1 in 24 vehicles on non-highway roads is a truck (4.2%).

Younger drivers than 86% of counties in North Carolina

The concentration of trucks on non-highway roads is 64% lower than on highways.

The non-highway congestion ratio of 17.2% is in line with the state level.

Trip origins here have higher average income than 85% of counties in North Carolina. Guilford's median driver age is lower than 86% of counties in North Carolina.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
A long morning plateau from 7:00 AM to 12:00 PM and PM peak 4:00 PM–6:00 PM, with volumes reaching approximately 76% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 18% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
Traffic is nearly flat through the year: even August–October, the busiest stretch, runs only +3% versus the annual average.
Lowest month:
January is the quietest month, with volumes -10% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Guilford County, North Carolina, the peak hour concentrates about 7% of the day's traffic, and traffic stays steady through the year (+3% in high season).

Guilford County vs. North Carolina Traffic Comparison

Guilford County stays close to the North Carolina average; the largest gap is its average daily traffic per road, 14% above.

MetricGuilford CountyNorth Carolina averageDifference
Traffic7,2316,332+14.2%
Truck % (Total Traffic)8.9%8.7%+2.2%
Truck % (Highway)11.9%12.1%-1.7%
Avg. Travel Time31.8 min32.3 min-1.4%

How Guilford County compares

Guilford County moves more traffic than any nearby county

Compared with its 4 closest neighbours, Guilford County moves 2.9 times the total daily travel; it has the second busiest roads of the five. Bigger and busier at once: more road than the areas around it and heavier traffic on it, which makes it the centre of gravity for travel in this part of the map.

Guilford County and the 4 nearest county-level areas by centroid distance, with the North Carolina average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Guilford County7,2318.9%14,395,70631.8 min18.3%
Alamance County, North Carolina5,4788.4%4,111,53532.2 min14.8%
Rockingham County, North Carolina3,8699.2%2,260,85731.9 min12.3%
Forsyth County, North Carolina7,2787.4%9,684,48630.6 min20.2%
Randolph County, North Carolina4,0889.9%3,670,83731.2 min12.1%
North Carolina average6,3328.7%N/A32.3 min18.6%

Guilford County ranked within North Carolina

Guilford County sits in North Carolina's top three on highway travel volume.

Guilford County ranked among 100 county-level areas in North Carolina (1 = highest); measures without data in every county rank a smaller field, down to 97.
MeasureGuilford CountyNorth Carolina rank
Traffic volume (AADT)7,231#18 of 100
Highway vehicle-miles per day8,827,410#3 of 97
Truck share on highways11.9%#51 of 97
Highway trucks per day2,626#16 of 97
Average travel time31.8 min#56 of 100
Average driver income$79,867#16 of 100
Average driver age44.7 yrs#86 of 100

The two ends of this table sit far apart: #3 of 97 on highway travel volume, against #86 of 100 on average driver age.

Busiest roads in Guilford County, North Carolina

Traffic concentrates on a few corridors: the three busiest roads average 85,458 vehicles a day, against 7,231 on the average road in Guilford County.

I 40 is the busiest road, at 118,950 vehicles a day, 16,113 of them trucks (13.6%). That is 54% more than the next road, I 85 (77,342). It tops the truck ranking too, with the most trucks.

Trips using I 85 are long: a median of 47.7 minutes against 31.8 county-wide, the mark of a through route.

Trucks make up 14.6% of traffic on I 85 BUS / US 29 / US 70 and 13.9% on Salem Parkway, against 8.9% across all roads in the county.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 40Motorway · 118,950vehicles16,113trucks · 13.6%
Road class
Motorway
Congestion ratio
83.4%
Median trip time
44.1 min
Drivers’ median age
44.5 yrs
Drivers’ average income
$66,012

Travel on I 40's busiest stretch runs 83% over free-flow time, against 18% across the county, so expect slower peak hours.

2I 85Motorway · 77,342vehicles9,938trucks · 12.8%
Road class
Motorway
Congestion ratio
40.3%
Median trip time
47.7 min
Drivers’ median age
45.1 yrs
Drivers’ average income
$67,595

I 85 carries 10.7 times the county average on its busiest stretch, where the median trip lasts 47.7 minutes.

3O'Henry BoulevardMotorway · 60,081vehicles6,446trucks · 10.7%
Road class
Motorway
Congestion ratio
65.5%
Median trip time
35.6 min
Drivers’ median age
44.2 yrs
Drivers’ average income
$62,192

O'Henry Boulevard is one of the more congested roads here: trips take 65% longer than at free-flow speed, against 18% county-wide.

4Salem ParkwayMotorway · 53,178vehicles7,401trucks · 13.9%
Road class
Motorway
Congestion ratio
62.4%
Median trip time
39.3 min
Drivers’ median age
45.3 yrs
Drivers’ average income
$79,990

At 7.4 times the county average, Salem Parkway draws drivers from neighborhoods averaging $79,990 in household income.

5Wendover AvenueTrunk road · 50,664vehicles3,304trucks · 6.5%
Road class
Trunk road
Congestion ratio
44.8%
Median trip time
30.7 min
Drivers’ median age
44.6 yrs
Drivers’ average income
$75,285

A main artery: Wendover Avenue's busiest stretch carries 7.0 times the county average; trucks are 6.5% of it, below the county-wide 8.9%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 40Motorway · #1 by traffic118,950vehicles16,113trucks · 13.6%
2I 85Motorway · #2 by traffic77,342vehicles9,938trucks · 12.8%
3Salem ParkwayMotorway · #4 by traffic53,178vehicles7,401trucks · 13.9%
4I 85 BUS / US 29 / US 70Motorway · 46,970vehicles6,840trucks · 14.6%
Road class
Motorway
Congestion ratio
36.1%
Median trip time
43.8 min
Drivers’ median age
44.5 yrs
Drivers’ average income
$62,434

I 85 BUS / US 29 / US 70 carries through traffic: the median trip using it lasts 43.8 minutes, against 31.8 for the county.

5O'Henry BoulevardMotorway · #3 by traffic60,081vehicles6,446trucks · 10.7%
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

GuilfordDepartment 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 Guilford County

The same traffic breakdown for the areas closest to Guilford County, North Carolina.

Need segment-level traffic data?

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