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Traffic heat map of Dimmit County, Texas: 251 miles of roads shaded from blue (light) to red (heavy traffic), busiest on 1st Street and Peña Street

Dimmit County, Texas Traffic Counts

TrafficZoom tracks traffic on 251 road miles in Dimmit County, Texas, divided into 1,409 segments averaging 941 ft. About 1 in 6 vehicles here is a truck, against 1 in 10 across Texas. Built from cross-verified mobile and road-sensor data, these counts help you size up a retail site, plan logistics routes or assess infrastructure needs.
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 Dimmit County, Texas

Traffic

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

vehicles per day3,046
Trucks

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

16.4%
Average travel time

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

36.7 min
Congestion ratio

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

7.9%
Drivers’ average age

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

39.6 yrs
Drivers’ average income

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

$52,010

The average monitored road in Dimmit County, Texas carries 3,046 vehicles per day. Across its 251 miles of monitored roads, that adds up to 601,011 vehicle-miles traveled per day (≈219 million per year). About 1 in 6 vehicles is a truck, well above the 9.8% across Texas - a freight-heavy mix.

Traffic 56% below the Texas average

Dimmit's average daily traffic volume is 56% lower than the state average - 3,046 vehicles per day against 6,895 - suggesting less traffic load per road - very light roads: easy truck access, but little passing trade for roadside retail. In total volume terms, its road network carries less than 0.1% of Texas's statewide total of vehicle-miles. 51% of counties in Texas see less traffic than Dimmit's 3,046 vehicles per day.

Journey times run 13% higher than the state level, at 36.7 minutes on average. Its average travel time of 36.7 minutes is longer than 64% of counties in Texas.

At 51% lower than the state level, the 7.9% congestion ratio signals smoother traffic flow - free-flowing roads make scheduled deliveries highly predictable.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Dimmit County, Texas

Trafficvehicles per day6,742
Trucks19.2%
Average travel time38.3 min
Congestion ratio12.4%
Drivers’ average age39.6 yrs
Drivers’ average income$53,470

Highways carry about half of all travel in Dimmit County, Texas, 53% of vehicle-miles. The average highway carries 6,742 vehicles per day, 337% more than the average non-highway road in the same area, which carries 1,545 vehicles per day.

With 23% of the road miles (58 miles in 407 segments), highways punch above their length, carrying 318,058 vehicle-miles traveled per day (≈116 million per year).

Freight-heavy highways

Highway truck concentration here runs 39% higher than the state average, at 19.2%. Highways here lean toward freight, so highway access is a real asset for logistics operators.

69% of counties in Texas see a lower highway truck share than Dimmit's 19.2%. By raw truck volume, Dimmit carries fewer highway trucks than 57% of counties in Texas.

non-highway traffic icon

Non-highway Traffic in Dimmit County, Texas

Trafficvehicles per day1,545
Trucks13.3%
Average travel time36.0 min
Congestion ratio6.1%
Drivers’ average age39.5 yrs
Drivers’ average income$50,486

Local roads carry about half of all travel in Dimmit County, Texas, 47% of vehicle-miles. On the average non-highway road, that comes to 1,545 vehicles per day.

Spread over 193 miles and 1,002 segments, 77% of the road network, local roads carry a lighter load per mile: 282,953 vehicle-miles traveled per day (≈103 million per year). About 1 in 8 vehicles on non-highway roads is a truck (13.3%).

Younger drivers than 96% of counties in Texas

Non-highway roads carry a truck concentration that's 31% lower than the highway network.

At 62% lower than the state level, the non-highway congestion ratio of 6.1% signals easier movement on local roads.

95% of counties in Texas see higher average driver income among trip origins than Dimmit. 96% of counties in Texas have an older driver population than Dimmit.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–8:00 AM and a long afternoon plateau from 3:00 PM to 7:00 PM, with volumes reaching approximately 50% higher than the daily average.
Weekend traffic:
Weekends are much quieter: volumes run about 26% 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 March–May, the busiest stretch, runs only +2% versus the annual average.
Lowest month:
July is the quietest month, with volumes -4% versus the annual average - an unusual summer low, when most places are at their busiest.

Data Finding: Hourly & Seasonal Patterns

In Dimmit County, Texas, traffic is spread evenly through the day, with the busiest hour carrying only about 6%, and traffic stays steady through the year (+2% in high season).

Dimmit County vs. Texas Traffic Comparison

Of the four measures, truck share differs most: Dimmit County runs 68% above the Texas average. Its average daily traffic per road, by contrast, is 56% below.

MetricDimmit CountyTexas averageDifference
Traffic3,0466,895-55.8%
Truck % (Total Traffic)16.4%9.8%+67.9%
Truck % (Highway)19.2%13.8%+39.4%
Avg. Travel Time36.7 min32.6 min+12.5%

How Dimmit County compares

Dimmit County against nearby counties

Set against the average of the 4 areas nearest to it, Dimmit County is 29.8% less congested and runs 6.6 percentage points less truck traffic; it has the second busiest roads of the five. Less traffic and more room for it - the roads here run both quieter and freer than the areas around them.

Dimmit 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
Dimmit County3,04616.4%601,01136.7 min7.9%
Zavala County, Texas2,48721.9%431,05845.7 min7.6%
Maverick County, Texas7,64111.9%963,58127.7 min20.6%
La Salle County, Texas2,69132.1%1,304,40856.5 min9.1%
Frio County, Texas2,44626.0%1,339,86636.9 min7.9%
Texas average6,8959.8%N/A32.6 min16.4%

Dimmit County ranked within Texas

Dimmit County sits in the bottom quarter of the Texas field on average driver age, at #244 of 254.

Dimmit County ranked among 254 county-level areas in Texas (1 = highest); measures without data in every county rank a smaller field, down to 227.
MeasureDimmit CountyTexas rank
Traffic volume (AADT)3,046#126 of 254
Highway vehicle-miles per day318,058#158 of 227
Truck share on highways19.2%#71 of 227
Highway trucks per day1,293#129 of 227
Average travel time36.7 min#91 of 254
Average driver income$52,010#241 of 254
Average driver age39.6 yrs#244 of 254

Dimmit County ranks #71 of 227 on truck share on highways but #244 of 254 on average driver age - the two describe the same roads and are worth reading together rather than either on its own.

Busiest roads in Dimmit County, Texas

On their busiest stretches, the three busiest roads in Dimmit County carry 8,738 vehicles a day on average, 2.9 times the typical road in the county (3,046).

1st Street leads with 12,850 vehicles a day, 1,120 of them trucks (8.7%). No other road comes close: Peña Street, in second place, carries 7,088. It tops the truck ranking too, with the most trucks.

US 277 carries longer journeys than most roads here, with a median trip of 54.1 minutes against 36.7 county-wide.

Drivers on 5th Street come from neighborhoods with an average household income of $67,354, 30% above the county average of $52,010.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
11st StreetTrunk road · 12,850vehicles1,120trucks · 8.7%
Road class
Trunk road
Congestion ratio
14.4%
Median trip time
27.4 min
Drivers’ median age
40.5 yrs
Drivers’ average income
$53,198

1st Street is a local road at heart: the median trip using it lasts 27.4 minutes, against 36.7 for the county.

2Peña StreetTrunk road · 7,088vehicles776trucks · 10.9%
Road class
Trunk road
Congestion ratio
16.4%
Median trip time
39.6 min
Drivers’ median age
38.9 yrs
Drivers’ average income
$62,910

Peña Street is one of the more congested roads here: trips take 16% longer than at free-flow speed, against 8% county-wide.

3US 83Trunk road · 6,278vehicles654trucks · 10.4%
Road class
Trunk road
Congestion ratio
14.2%
Median trip time
31.6 min
Drivers’ median age
41.0 yrs
Drivers’ average income
$53,320

The busiest stretch of US 83 carries 2.1 times the county average; trucks are 10.4% of it, below the county-wide 16.4%.

45th StreetTertiary road · 5,265vehicles161trucks · 3.0%
Road class
Tertiary road
Congestion ratio
11.6%
Median trip time
35.0 min
Drivers’ median age
39.6 yrs
Drivers’ average income
$67,354

At 73% more than the county average, 5th Street draws drivers from neighborhoods averaging $67,354 in household income.

5Grand AvenuePrimary road · 4,647vehicles747trucks · 16.1%
Road class
Primary road
Median trip time
38.8 min
Drivers’ median age
39.6 yrs
Drivers’ average income
$51,699

Grand Avenue is busy by local standards, at 53% more than the county average on its busiest stretch; trucks are 16.1% of it, in line with the county-wide 16.4%.

Ranked by trucks per day

Cars and light vehiclesTrucks
11st StreetTrunk road · #1 by traffic12,850vehicles1,120trucks · 8.7%
2US 277Trunk road · 4,191vehicles940trucks · 22.4%
Road class
Trunk road
Congestion ratio
9.0%
Median trip time
54.1 min
Drivers’ median age
38.3 yrs
Drivers’ average income
$61,042

US 277 peaks at 4,191 vehicles a day, 38% more than the county average; trucks are 22.4% of it, above the county-wide 16.4%.

3Peña StreetTrunk road · #2 by traffic7,088vehicles776trucks · 10.9%
4Grand AvenuePrimary road · #5 by traffic4,647vehicles747trucks · 16.1%
5US 83Trunk road · #3 by traffic6,278vehicles654trucks · 10.4%
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

DimmitDepartment 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 Dimmit County

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

Need segment-level traffic data?

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