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Traffic heat map of Smith County, Texas: 907 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Southwest Loop 323 and Broadway Avenue

Smith County, Texas Traffic Counts

How busy are the roads of Smith County, Texas? We measure 907 road miles, divided into 11,762 segments, with multi-sourced, cross-verified mobile and sensor data. Its busiest road, Southwest Loop 323, carries 39,248 vehicles a day, 4.8 times the average road. The breakdown below covers volume, trucks, congestion and driver profiles for retailers, logistics planners and engineers.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
Updated:
September 29, 2026
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total traffic icon

Total Traffic Volume & Performance in Smith County, Texas

Traffic

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

vehicles per day8,201
Trucks

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

11.2%
Average travel time

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

34.7 min
Congestion ratio

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

16.0%
Drivers’ average age

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

45.9 yrs
Drivers’ average income

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

$80,499

Our data shows 8,201 vehicles per day on the average road in Smith County, Texas, and 6,756,289 vehicle-miles traveled per day (≈2.5 billion per year) across its 907 miles of monitored roads. Trucks are 11.2% of traffic, close to the 9.8% across Texas.

Busier roads than 95% of counties in Texas

At 8,201 vehicles per day, the average monitored road in Smith carries 19% more traffic than the state average of 6,895, suggesting more demand on each road - a factor worth weighing in site selection and logistics planning. Network-wide, Smith accounts for about 0.9% of Texas's statewide total of vehicle-miles. Smith carries more traffic than 95% of counties in Texas.

Journey times run 6% higher than the state level, at 34.7 minutes on average. Its average travel time of 34.7 minutes is longer than 50% of counties in Texas.

At 16.0%, the congestion ratio matches the state level closely.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Smith County, Texas

Trafficvehicles per day14,612
Trucks16.5%
Average travel time36.3 min
Congestion ratio25.4%
Drivers’ average age46.5 yrs
Drivers’ average income$78,993

Travel in Smith County, Texas splits roughly evenly, with about half of it (53% of vehicle-miles) on highways. The average highway carries 14,612 vehicles per day, 114% more than the average non-highway road in the same area, which carries 6,833 vehicles per day.

With 28% of the road miles (257 miles in 2,069 segments), highways punch above their length, carrying 3,549,800 vehicle-miles traveled per day (≈1.3 billion per year).

That is more highway travel volume than 92% of counties in Texas.

More highway trucks than 74% of counties in Texas

At 16.5%, highway truck share is 20% higher than the state average. Highways here lean toward freight, so highway access is a real asset for logistics operators.

55% of counties in Texas see a lower highway truck share than Smith's 16.5%. Smith's highway truck count is higher than 74% of counties in Texas, at roughly 2,417 trucks per day.

non-highway traffic icon

Non-highway Traffic in Smith County, Texas

Trafficvehicles per day6,833
Trucks5.3%
Average travel time34.4 min
Congestion ratio14.0%
Drivers’ average age45.1 yrs
Drivers’ average income$81,665

Travel in Smith County, Texas splits roughly evenly, with about half of it (47% of vehicle-miles) on local roads. The average non-highway road carries 6,833 vehicles per day.

Local roads make up 72% of the monitored road miles (650 miles in 9,693 segments) but carry less than their share of travel: 3,206,488 vehicle-miles traveled per day (≈1.2 billion per year). The truck share on non-highway roads is 5.3%.

Drivers from higher-income areas than 81% of counties in Texas

The concentration of trucks on non-highway roads is 68% lower than on highways.

Non-highway congestion (14.0%) runs slightly lower than the state level (12% lower).

Smith's average driver income is higher than 81% of counties in Texas. 52% of counties in Texas have a younger driver population than Smith.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–8:00 AM and PM peak 4:00 PM–7:00 PM, with volumes reaching approximately 70% higher than the daily average.
Weekend traffic:
Weekends are much quieter: volumes run about 25% below weekday levels, the signature of a commute-driven road network.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
Traffic is nearly flat through the year: even August–October, the busiest stretch, runs only +2% versus the annual average.
Lowest month:
January is the quietest month, with volumes -7% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Smith County, Texas, the peak hour concentrates about 7% of the day's traffic, and traffic stays steady through the year (+2% in high season).

Smith County vs. Texas Traffic Comparison

The highway truck share sets Smith County apart: 20% above the Texas average. Its average daily traffic per road is also 19% above.

MetricSmith CountyTexas averageDifference
Traffic8,2016,895+18.9%
Truck % (Total Traffic)11.2%9.8%+14.9%
Truck % (Highway)16.5%13.8%+20.3%
Avg. Travel Time34.7 min32.6 min+6.3%

How Smith County compares

Smith County moves more traffic than any nearby county

Compared with its 4 closest neighbours, Smith County moves 3.3 times the total daily travel and is 56.5% more congested; it has the second busiest roads of the five. It is where traffic concentrates in this corner of the map - the local bottleneck, with more vehicles per road AND less room to absorb them.

Smith County and the 4 nearest county-level areas by centroid distance, with the Texas average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Smith County8,20111.2%6,756,28934.7 min16.0%
Gregg County, Texas8,71210.0%3,479,26533.5 min14.5%
Wood County, Texas3,2308.8%1,031,66330.0 min8.6%
Upshur County, Texas4,0978.8%1,088,30234.2 min8.7%
Van Zandt County, Texas3,09716.0%2,525,17833.7 min9.3%
Texas average6,8959.8%N/A32.6 min16.4%

Smith County ranked within Texas

Smith County sits in the top quarter of the Texas field on average daily traffic volume, at #13 of 254.

Smith County ranked among 254 county-level areas in Texas (1 = highest); measures without data in every county rank a smaller field, down to 227.
MeasureSmith CountyTexas rank
Traffic volume (AADT)8,201#13 of 254
Highway vehicle-miles per day3,549,800#18 of 227
Truck share on highways16.5%#103 of 227
Highway trucks per day2,417#60 of 227
Average travel time34.7 min#127 of 254
Average driver income$80,499#50 of 254
Average driver age45.9 yrs#123 of 254

Busiest roads in Smith County, Texas

The three busiest roads in Smith County average 37,755 vehicles a day, 4.6 times the county average of 8,201 across all its monitored roads.

Southwest Loop 323 is the busiest road, at 39,248 vehicles a day, 1,944 of them trucks (5.0%). I 20 carries the most trucks, 10,308 a day (29.4% of its traffic), although it ranks #5 for all traffic.

Trucks make up 29.4% of traffic on I 20, against 11.2% across all roads in the county.

I 20 carries longer journeys than most roads here, with a median trip of 54.5 minutes against 34.7 county-wide.

Traffic and freight follow different roads here: only 1 of the five busiest roads also make the top 5 for trucks.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Southwest Loop 323Trunk road · 39,248vehicles1,944trucks · 5.0%
Road class
Trunk road
Congestion ratio
29.8%
Median trip time
34.9 min
Drivers’ median age
47.0 yrs
Drivers’ average income
$78,632

At 4.8 times the county average, Southwest Loop 323 draws drivers from neighborhoods averaging $78,632 in household income.

2Southeast Loop 323Trunk road · 37,598vehicles1,772trucks · 4.7%
Road class
Trunk road
Congestion ratio
28.9%
Median trip time
34.2 min
Drivers’ median age
46.2 yrs
Drivers’ average income
$79,692

The busiest stretch of Southeast Loop 323 carries 4.6 times the county average; trucks are 4.7% of it, below the county-wide 11.2%.

3Broadway AvenueTrunk road · 36,420vehicles1,539trucks · 4.2%
Road class
Trunk road
Congestion ratio
43.3%
Median trip time
36.0 min
Drivers’ median age
46.4 yrs
Drivers’ average income
$86,013

Delays build on Broadway Avenue: its congestion ratio of 43% over free-flow time is well above the county's 16%.

4Northwest Loop 323Trunk road · 35,186vehicles1,800trucks · 5.1%
Road class
Trunk road
Congestion ratio
28.4%
Median trip time
33.7 min
Drivers’ median age
46.5 yrs
Drivers’ average income
$72,803

On its busiest stretch, Northwest Loop 323 carries 4.3 times the county average; trucks are 5.1% of it, below the county-wide 11.2%.

5I 20Motorway · 35,083vehicles10,308trucks · 29.4%
Road class
Motorway
Congestion ratio
34.0%
Median trip time
54.5 min
Drivers’ median age
47.3 yrs
Drivers’ average income
$75,464

Travel on I 20's busiest stretch runs 34% over free-flow time, against 16% across the county, so expect slower peak hours.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 20Motorway · #5 by traffic35,083vehicles10,308trucks · 29.4%
2US 69Trunk road · 24,492vehicles2,866trucks · 11.7%
Road class
Trunk road
Congestion ratio
27.2%
Median trip time
37.6 min
Drivers’ median age
47.3 yrs
Drivers’ average income
$78,280

US 69 peaks at 24,492 vehicles a day, 3.0 times the county average; trucks are 11.7% of it, in line with the county-wide 11.2%.

3Mineola HighwayTrunk road · 27,845vehicles2,787trucks · 10.0%
Road class
Trunk road
Congestion ratio
30.8%
Median trip time
36.4 min
Drivers’ median age
46.7 yrs
Drivers’ average income
$77,115

Mineola Highway carries 3.4 times the county average at its busiest, 2,787 of them trucks (10.0%, below the county-wide 11.2%).

4Northeast Loop 323Trunk road · 22,936vehicles2,402trucks · 10.5%
Road class
Trunk road
Congestion ratio
27.8%
Median trip time
36.0 min
Drivers’ median age
45.6 yrs
Drivers’ average income
$75,272

Northeast Loop 323 carries 2.8 times the county average on its busiest stretch, where the median trip lasts 36.0 minutes.

5US 271Trunk road · 16,758vehicles2,387trucks · 14.2%
Road class
Trunk road
Congestion ratio
17.9%
Median trip time
41.5 min
Drivers’ median age
45.0 yrs
Drivers’ average income
$73,615

At 2.0 times the county average, US 271 draws drivers from neighborhoods averaging $73,615 in household income.

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

SmithDepartment 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 Smith County

The same traffic breakdown for the areas closest to Smith County, Texas.

Need segment-level traffic data?

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