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Traffic heat map of San Patricio County, Texas: 477 miles of roads shaded from blue (light) to red (heavy traffic)

San Patricio County, Texas Traffic Counts

TrafficZoom tracks traffic on 477 road miles in San Patricio County, Texas, divided into 3,777 segments averaging 667 ft. The average road here carries 4,601 vehicles a day, 33% less than the Texas average of 6,895. 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 San Patricio County, Texas

Traffic

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

vehicles per day4,601
Trucks

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

13.1%
Average travel time

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

32.2 min
Congestion ratio

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

12.8%
Drivers’ average age

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

45.6 yrs
Drivers’ average income

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

$70,070

Our data shows 4,601 vehicles per day on the average road in San Patricio County, Texas, and 2,156,705 vehicle-miles traveled per day (≈787 million per year) across its 477 miles of monitored roads. Trucks are 13.1% of traffic, more than the 9.8% across Texas.

Busier roads than 74% of counties in Texas

At 4,601 vehicles per day, the average monitored road in San Patricio carries 33% less traffic than the state average of 6,895, suggesting less demand on each road - lighter roads for freight, but less passing trade for roadside retail. In total volume terms, its road network carries about 0.3% of Texas's statewide total of vehicle-miles. 74% of counties in Texas see less traffic than San Patricio's 4,601 vehicles per day.

The average trip takes 32.2 minutes, on par with the state level. 74% of counties in Texas have a longer average travel time than San Patricio's 32.2 minutes.

Congestion runs 22% lower than the state level, at a ratio of 12.8%, which means smoother traffic flow - relevant for traffic control and delivery planning.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in San Patricio County, Texas

Trafficvehicles per day9,336
Trucks16.0%
Average travel time39.5 min
Congestion ratio18.0%
Drivers’ average age45.0 yrs
Drivers’ average income$69,549

Highways carry more than half of all travel in San Patricio County, Texas (67% of vehicle-miles). The average highway carries 9,336 vehicles per day, 151% more than the average non-highway road in the same area, which carries 3,717 vehicles per day.

Highways make up 35% of the monitored road miles (169 miles, 594 segments), so they carry more than their share: 1,448,781 vehicle-miles traveled per day (≈529 million per year).

77% of counties in Texas move less traffic on their highways.

Freight-heavy highways

The concentration of trucks on highways (16.0%) is 17% higher than the state average for similar road classifications. Highways here lean toward freight, so highway access is a real asset for logistics operators.

San Patricio's highway truck share (16.0%) is higher than 53% of counties in Texas. 54% of counties in Texas see fewer highway trucks per day than San Patricio's roughly 1,496.

non-highway traffic icon

Non-highway Traffic in San Patricio County, Texas

Trafficvehicles per day3,717
Trucks7.0%
Average travel time30.8 min
Congestion ratio11.9%
Drivers’ average age46.7 yrs
Drivers’ average income$70,749

Local roads carry a significant share of travel in San Patricio County, Texas: 33% of all vehicle-miles. On the average non-highway road, that comes to 3,717 vehicles per day.

Spread over 308 miles and 3,183 segments, 65% of the road network, local roads carry a lighter load per mile: 707,924 vehicle-miles traveled per day (≈258 million per year). About 1 in 14 vehicles on non-highway roads is a truck (7.0%).

Local roads carry 56% fewer trucks by share than highways

Non-highway roads carry a truck concentration that's 56% lower than the highway network.

Non-highway congestion (11.9%) runs 26% lower than the state average, pointing to smoother local traffic flow.

Trip origins here have higher average income than 53% of counties in Texas. 51% of counties in Texas have an older driver population than San Patricio.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

In San Patricio County, Texas, the peak hour concentrates about 7% of the day's traffic.

San Patricio County vs. Texas Traffic Comparison

Of the four measures, truck share differs most: San Patricio County runs 34% above the Texas average. Its average daily traffic per road, by contrast, is 33% below.

MetricSan Patricio CountyTexas averageDifference
Traffic4,6016,895-33.3%
Truck % (Total Traffic)13.1%9.8%+33.7%
Truck % (Highway)16.0%13.8%+16.5%
Avg. Travel Time32.2 min32.6 min-1.3%

How San Patricio County compares

San Patricio County against nearby counties

Set against the average of the 4 areas nearest to it, San Patricio County sees 19.2% shorter typical trips; it has the third busiest roads of the five.

San Patricio 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
San Patricio County4,60113.1%2,156,70532.2 min12.8%
Nueces County, Texas7,9688.5%7,963,54830.4 min23.1%
Refugio County, Texas3,35420.0%790,72857.5 min8.2%
Aransas County, Texas4,8956.4%580,74629.1 min16.2%
Bee County, Texas2,87610.7%697,64742.3 min9.1%
Texas average6,8959.8%N/A32.6 min16.4%

San Patricio County ranked within Texas

San Patricio County sits in the top quarter of the Texas field on highway travel volume, at #54 of 227.

San Patricio County ranked among 254 county-level areas in Texas (1 = highest); measures without data in every county rank a smaller field, down to 227.
MeasureSan Patricio CountyTexas rank
Traffic volume (AADT)4,601#66 of 254
Highway vehicle-miles per day1,448,781#54 of 227
Truck share on highways16.0%#108 of 227
Highway trucks per day1,496#106 of 227
Average travel time32.2 min#188 of 254
Average driver income$70,070#119 of 254
Average driver age45.6 yrs#129 of 254

Busiest roads in San Patricio County, Texas

The top three roads on this list in San Patricio County average 29,986 vehicles a day, 6.5 times the county average of 4,601 across all its monitored roads.

US 181 tops the list with 36,201 vehicles a day, 3,275 of them trucks (9.1%). I 37 carries the most trucks on the list, 5,278 a day (21.3% of its traffic), although it ranks #4 for all traffic.

I 37 carries longer journeys than most roads here, with a median trip of 46.3 minutes against 32.2 county-wide.

Trucks make up 21.3% of traffic on I 37, against 13.1% across all roads in the county.

Ranked by daily traffic (AADT)

Only named roads are listed. Some unnamed segments, such as ramps or unlabeled carriageways, may carry as much traffic as the roads shown.

Cars and light vehiclesTrucks
1US 181Motorway · 36,201vehicles3,275trucks · 9.1%
Road class
Motorway
Congestion ratio
42.8%
Median trip time
33.9 min
Drivers’ median age
45.1 yrs
Drivers’ average income
$71,693

US 181 is one of the more congested roads here: trips take 43% longer than at free-flow speed, against 13% county-wide.

2I37Motorway · 28,060vehicles5,045trucks · 18.0%
Road class
Motorway
Median trip time
43.8 min
Drivers’ median age
43.4 yrs
Drivers’ average income
$72,645

I37 carries through traffic: the median trip using it lasts 43.8 minutes, against 32.2 for the county.

3TX 35Motorway · 25,698vehicles2,579trucks · 10.0%
Road class
Motorway
Congestion ratio
29.4%
Median trip time
34.3 min
Drivers’ median age
46.3 yrs
Drivers’ average income
$71,874

TX 35 carries 5.6 times the county average on its busiest stretch, where the median trip lasts 34.3 minutes.

4I 37Motorway · 24,809vehicles5,278trucks · 21.3%
Road class
Motorway
Congestion ratio
39.0%
Median trip time
46.3 min
Drivers’ median age
45.7 yrs
Drivers’ average income
$65,169

Delays build on I 37: its congestion ratio of 39% over free-flow time is well above the county's 13%.

5TX 361Trunk road · 17,707vehicles1,769trucks · 10.0%
Road class
Trunk road
Congestion ratio
16.8%
Median trip time
30.1 min
Drivers’ median age
45.9 yrs
Drivers’ average income
$77,718

At 3.8 times the county average, TX 361 draws drivers from neighborhoods averaging $77,718 in household income.

Ranked by trucks per day

Only named roads are listed. Some unnamed segments, such as ramps or unlabeled carriageways, may carry as much traffic as the roads shown.

Cars and light vehiclesTrucks
1I 37Motorway · #4 by traffic24,809vehicles5,278trucks · 21.3%
2I37Motorway · #2 by traffic28,060vehicles5,045trucks · 18.0%
3US 181Motorway · #1 by traffic36,201vehicles3,275trucks · 9.1%
4TX 35Motorway · #3 by traffic25,698vehicles2,579trucks · 10.0%
5US 77Trunk road · 17,632vehicles2,313trucks · 13.1%
Road class
Trunk road
Congestion ratio
23.4%
Median trip time
38.3 min
Drivers’ median age
43.8 yrs
Drivers’ average income
$67,408

The busiest stretch of US 77 carries 3.8 times the county average; trucks are 13.1% of it, in line with the county-wide 13.1%.

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

San PatricioDepartment 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 San Patricio County

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

Need segment-level traffic data?

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