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Traffic heat map of Sweetwater County, Wyoming: 858 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Elk Street and Dewar Drive

Sweetwater County, Wyoming Traffic Counts

It moves more highway traffic than any other county in Wyoming. This page breaks down traffic in Sweetwater County, Wyoming across 858 miles of monitored roads split into 2,471 segments, using multi-sourced mobile and sensor data. It goes beyond raw counts to truck flow, congestion and who is driving, so site selection and route planning rest on evidence.
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 Sweetwater County, Wyoming

Traffic

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

vehicles per day4,287
Trucks

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

28.3%
Average travel time

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

35.5 min
Congestion ratio

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

13.1%
Drivers’ average age

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

43.6 yrs
Drivers’ average income

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

$77,801

A typical monitored road in Sweetwater County, Wyoming sees 4,287 vehicles per day, while its 858 miles of monitored roads together handle 3,236,765 vehicle-miles traveled per day (≈1.2 billion per year). Freight weighs heavily here: trucks are 28.3% of traffic, against 17.9% across Wyoming.

Busier roads than 77% of counties in Wyoming

Sweetwater sees 17% higher average daily traffic volume than the state average (4,287 vehicles per day against 3,650), suggesting more demand on each road - a factor worth weighing in site selection and logistics planning. Network-wide, Sweetwater accounts for about 15% of Wyoming's statewide total of vehicle-miles. Sweetwater carries more traffic than 77% of counties in Wyoming.

At 35.5 minutes, the average travel time matches the state level closely. On travel time, Sweetwater runs longer than 50% of counties in Wyoming.

Congestion is somewhat higher than the state level, at a ratio of 13.1% (14% higher) - relevant for traffic control and delivery planning.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Sweetwater County, Wyoming

Trafficvehicles per day6,533
Trucks31.7%
Average travel time40.6 min
Congestion ratio21.4%
Drivers’ average age43.5 yrs
Drivers’ average income$77,760

Highways carry the vast majority of travel in Sweetwater County, Wyoming, 86% of all vehicle-miles. The average highway carries 6,533 vehicles per day, 80% more than the average non-highway road in the same area, which carries 3,620 vehicles per day.

Highways make up 47% of the monitored road miles (400 miles, 566 segments), so they carry more than their share: 2,779,417 vehicle-miles traveled per day (≈1.0 billion per year).

No county in Wyoming moves more traffic on its highways.

Higher highway truck share than 89% of counties in Wyoming

At 31.7%, highway truck share is 36% higher than the state average. Highways here lean toward freight, so highway access is a real asset for logistics operators.

89% of counties in Wyoming see a lower highway truck share than Sweetwater's 31.7%. 89% of counties in Wyoming see fewer highway trucks per day than Sweetwater's roughly 2,070.

non-highway traffic icon

Non-highway Traffic in Sweetwater County, Wyoming

Trafficvehicles per day3,620
Trucks7.9%
Average travel time34.0 min
Congestion ratio10.6%
Drivers’ average age43.6 yrs
Drivers’ average income$77,874

Local roads carry only a small share of the traffic in Sweetwater County, Wyoming, 14% of all vehicle-miles. On the average non-highway road, that comes to 3,620 vehicles per day.

Local roads make up 53% of the monitored road miles (458 miles in 1,905 segments) but carry less than their share of travel: 457,348 vehicle-miles traveled per day (≈167 million per year). Trucks make up 7.9% of non-highway traffic, about 1 in 13 vehicles.

Younger drivers than 91% of counties in Wyoming

The concentration of trucks on non-highway roads is 75% lower than on highways.

Non-highway congestion (10.6%) runs slightly lower than the state level (9% lower).

59% of counties in Wyoming see lower average driver income among trip origins than Sweetwater. The driver population here skews younger than 91% of counties in Wyoming.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 9:00 AM–12:00 PM and PM peak 3:00 PM–6:00 PM, with volumes reaching approximately 60% higher than the daily average.
Weekend traffic:
Weekends are much quieter: volumes run about 22% below weekday levels, the signature of a commute-driven road network.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +20% versus the annual average.
Lowest month:
January is the quietest month, with volumes -24% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Sweetwater County, Wyoming, the peak hour concentrates about 7% of the day's traffic, and there is a strong seasonal swing of +20% in high season.

Sweetwater County vs. Wyoming Traffic Comparison

Of the four measures, truck share differs most: Sweetwater County runs 58% above the Wyoming average. Its highway truck share is also 36% above.

MetricSweetwater CountyWyoming averageDifference
Traffic4,2873,650+17.5%
Truck % (Total Traffic)28.3%17.9%+58.4%
Truck % (Highway)31.7%23.3%+36.0%
Avg. Travel Time35.5 min34.5 min+3.0%

How Sweetwater County compares

Sweetwater County moves more traffic than any nearby county

Compared with its 4 closest neighbours, Sweetwater County moves 7.0 times the total daily travel and runs 12.9 percentage points more truck traffic; it has the 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.

Sweetwater County and the 4 nearest county-level areas by centroid distance, with the Wyoming average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Sweetwater County4,28728.3%3,236,76535.5 min13.1%
Daggett County, Utah52410.3%14,14231.1 minN/A
Moffat County, Colorado2,80411.3%268,42035.4 min7.9%
Uinta County, Wyoming3,32929.1%1,150,22430.4 min10.4%
Sublette County, Wyoming2,64211.2%421,62430.1 min7.1%
Wyoming average3,65017.9%N/A34.5 min11.5%

Sweetwater County ranked within Wyoming

Sweetwater County posts the highest highway travel volume of any county-level area in Wyoming.

Sweetwater County ranked among 23 county-level areas in Wyoming (1 = highest); measures without data in every county rank a smaller field, down to 20.
MeasureSweetwater CountyWyoming rank
Traffic volume (AADT)4,287#6 of 23
Highway vehicle-miles per day2,779,417#1 of 20
Truck share on highways31.7%#3 of 20
Highway trucks per day2,070#3 of 20
Average travel time35.5 min#12 of 23
Average driver income$77,801#10 of 23
Average driver age43.6 yrs#21 of 23

The two ends of this table sit far apart: #1 of 20 on highway travel volume, against #21 of 23 on average driver age.

Busiest roads in Sweetwater County, Wyoming

On their busiest stretches, the three busiest roads in Sweetwater County carry 20,266 vehicles a day on average, 4.7 times the typical road in the county (4,287).

Elk Street is the busiest road, at 22,896 vehicles a day, 1,170 of them trucks (5.1%). Green River Tunnel carries the most trucks, 5,900 a day (41.6% of its traffic), although it ranks #4 for all traffic.

Few trucks use Dewar Drive: 4.2% of its traffic, under half the county's 28.3%.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Elk StreetPrimary road · 22,896vehicles1,170trucks · 5.1%
Road class
Primary road
Congestion ratio
27.6%
Median trip time
45.0 min
Drivers’ median age
43.8 yrs
Drivers’ average income
$64,474

Travel on Elk Street's busiest stretch runs 28% over free-flow time, against 13% across the county, so expect slower peak hours.

2Dewar DrivePrimary road · 21,142vehicles886trucks · 4.2%
Road class
Primary road
Congestion ratio
19.8%
Median trip time
32.5 min
Drivers’ median age
44.0 yrs
Drivers’ average income
$75,638

At 4.9 times the county average, Dewar Drive draws drivers from neighborhoods averaging $75,638 in household income.

3Dwight D. Eisenhower HighwayMotorway · 16,759vehicles5,616trucks · 33.5%
Road class
Motorway
Congestion ratio
20.3%
Median trip time
41.6 min
Drivers’ median age
44.0 yrs
Drivers’ average income
$78,150

Dwight D. Eisenhower Highway is one of the more congested roads here: trips take 20% longer than at free-flow speed, against 13% county-wide.

4Green River TunnelMotorway · 14,176vehicles5,900trucks · 41.6%
Road class
Motorway
Median trip time
40.6 min
Drivers’ median age
42.0 yrs
Drivers’ average income
$77,156

The busiest stretch of Green River Tunnel carries 3.3 times the county average; trucks are 41.6% of it, above the county-wide 28.3%.

5Center StreetPrimary road · 12,905vehicles493trucks · 3.8%
Road class
Primary road
Congestion ratio
15.0%
Median trip time
41.6 min
Drivers’ median age
43.8 yrs
Drivers’ average income
$66,825

On its busiest stretch, Center Street carries 3.0 times the county average; trucks are 3.8% of it, below the county-wide 28.3%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Green River TunnelMotorway · #4 by traffic14,176vehicles5,900trucks · 41.6%
2Dwight D. Eisenhower HighwayMotorway · #3 by traffic16,759vehicles5,616trucks · 33.5%
3Elk StreetPrimary road · #1 by traffic22,896vehicles1,170trucks · 5.1%
4Dewar DrivePrimary road · #2 by traffic21,142vehicles886trucks · 4.2%
5Uinta DrivePrimary road · 9,694vehicles807trucks · 8.3%
Road class
Primary road
Median trip time
27.7 min
Drivers’ median age
44.0 yrs
Drivers’ average income
$85,034

Uinta Drive peaks at 9,694 vehicles a day, 2.3 times the county average; trucks are 8.3% of it, below the county-wide 28.3%.

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

SweetwaterDepartment 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 Sweetwater County

The same traffic breakdown for the areas closest to Sweetwater County, Wyoming.

Need segment-level traffic data?

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