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Traffic heat map of Sherman County, Oregon: 166 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Columbia River Highway

Sherman County, Oregon Traffic Counts

Traffic analytics for Sherman County, Oregon, calculated from real-world mobile and sensor networks on 569 road segments (166 road miles, about 1,539 ft each). Its highways carry one of the top 5 truck shares of any county in Oregon. Use the figures below to move from assumptions to certainty on retail locations, logistics and road planning.
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 Sherman County, Oregon

Traffic

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

vehicles per day2,199
Trucks

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

19.7%
Average travel time

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

53.2 min
Congestion ratio

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

8.3%
Drivers’ average age

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

48.2 yrs
Drivers’ average income

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

$67,511

A typical monitored road in Sherman County, Oregon sees 2,199 vehicles per day, while its 166 miles of monitored roads together handle 631,260 vehicle-miles traveled per day (≈230 million per year). About 1 in 5 vehicles is a truck, well above the 9.2% across Oregon - a freight-heavy mix.

Longer trips than 97% of counties in Oregon

Sherman's average daily traffic volume is 63% lower than the state average - 2,199 vehicles per day against 5,908 - suggesting less traffic load per road - quiet roads that suit freight movement more than drive-by retail. Across the whole network, that travel is about 0.7% of Oregon's statewide total. 80% of counties in Oregon see more traffic than Sherman's 2,199 vehicles per day.

Journey times run 55% higher than the state level, at 53.2 minutes on average. On travel time, Sherman runs longer than 97% of counties in Oregon.

Congestion runs 50% lower than the state level, at a ratio of 8.3%, which means smoother traffic flow - fewer delays make delivery windows more reliable.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Sherman County, Oregon

Trafficvehicles per day4,120
Trucks20.1%
Average travel time61.8 min
Congestion ratio10.2%
Drivers’ average age48.0 yrs
Drivers’ average income$67,879

Highways carry nearly all of the traffic in Sherman County, Oregon, 96% of all vehicle-miles. The average highway carries 4,120 vehicles per day, 437% more than the average non-highway road in the same area, which carries 767 vehicles per day.

With 66% of the road miles (109 miles in 243 segments), highways punch above their length, carrying 608,536 vehicle-miles traveled per day (≈222 million per year).

Higher highway truck share than 88% of counties in Oregon

The concentration of trucks on highways (20.1%) is 68% higher than the state average for similar road classifications. That marks Sherman as a major freight corridor, where highway access is what logistics operators compete on.

88% of counties in Oregon see a lower highway truck share than Sherman's 20.1%. 53% of counties in Oregon see more highway trucks per day than Sherman's roughly 828.

non-highway traffic icon

Non-highway Traffic in Sherman County, Oregon

Trafficvehicles per day767
Trucks8.2%
Average travel time46.9 min
Congestion ratio6.9%
Drivers’ average age53.3 yrs
Drivers’ average income$61,461

With 4% of vehicle-miles, local roads play a minor role in how Sherman County, Oregon travels. A typical local road sees 767 vehicles per day.

Local roads make up 34% of the monitored road miles (57 miles in 326 segments) but carry less than their share of travel: 22,723 vehicle-miles traveled per day (≈8.3 million per year). About 1 in 12 vehicles on non-highway roads is a truck (8.2%).

Local congestion 57% below the Oregon average

The concentration of trucks on non-highway roads is 59% lower than on highways.

The non-highway congestion ratio of 6.9% is 57% lower than the state level, suggesting more efficient local mobility than the state average.

Trip origins here have lower average income than 66% of counties in Oregon. Sherman's median driver age is lower than 51% of counties in Oregon.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 9:00 AM–12:00 PM and a long afternoon plateau from 1:00 PM to 7:00 PM, with volumes reaching approximately 82% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 8% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +26% versus the annual average.
Lowest month:
January is the quietest month, with volumes -30% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Sherman County, Oregon, the peak hour concentrates about 8% of the day's traffic, and there is a strong seasonal swing of +26% in high season.

Sherman County vs. Oregon Traffic Comparison

The truck share sets Sherman County apart: 114% above the Oregon average. Its highway truck share is also 68% above.

MetricSherman CountyOregon averageDifference
Traffic2,1995,908-62.8%
Truck % (Total Traffic)19.7%9.2%+113.6%
Truck % (Highway)20.1%12.0%+67.6%
Avg. Travel Time53.2 min34.3 min+55.3%

How Sherman County compares

Sherman County against nearby counties

Against the 4 nearest areas, Sherman County sees 36.9% longer typical trips; it has the fourth busiest roads of the five. Trips here run longer without running slower: distance, not congestion, is what drivers spend their time on.

Sherman County and the 4 nearest county-level areas by centroid distance, with the Oregon average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Sherman County2,19919.7%631,26053.2 min8.3%
Gilliam County, Oregon1,43222.5%432,77457.5 min4.8%
Klickitat County, Washington2,35912.1%723,93631.4 min8.4%
Wasco County, Oregon3,11315.9%1,390,08938.1 min11.2%
Hood River County, Oregon3,26414.6%1,051,29728.6 min12.7%
Oregon average5,9089.2%N/A34.3 min16.6%

Sherman County ranked within Oregon

Sherman County sits in Oregon's top three on average travel time.

Sherman County ranked among 36 county-level areas in Oregon (1 = highest); measures without data in every county rank a smaller field, down to 33.
MeasureSherman CountyOregon rank
Traffic volume (AADT)2,199#29 of 36
Highway vehicle-miles per day608,536#23 of 33
Truck share on highways20.1%#5 of 33
Highway trucks per day828#18 of 33
Average travel time53.2 min#2 of 36
Average driver income$67,511#24 of 36
Average driver age48.2 yrs#19 of 36

The two ends of this table sit far apart: #2 of 36 on average travel time, against #29 of 36 on average daily traffic volume.

Busiest roads in Sherman County, Oregon

On their busiest stretches, the three busiest roads in Sherman County carry 6,546 vehicles a day on average, 3.0 times the typical road in the county (2,199).

Columbia River Highway is the busiest road, at 15,246 vehicles a day, 3,477 of them trucks (22.8%). No other road comes close: Sherman Highway, in second place, carries 3,222. It also carries the most trucks.

1st Street is busy with cars rather than freight: only 5.8% of its traffic is trucks, against 19.7% county-wide.

Sam Hill Memorial Bridge is a local road at heart: the median trip using it lasts 32.6 minutes, against 53.2 for the county.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Columbia River HighwayMotorway · 15,246vehicles3,477trucks · 22.8%
Road class
Motorway
Congestion ratio
15.8%
Median trip time
66.3 min
Drivers’ median age
47.3 yrs
Drivers’ average income
$68,909

Travel on Columbia River Highway's busiest stretch runs 16% over free-flow time, against 8% across the county, so expect slower peak hours.

2Sherman HighwayTrunk road · 3,222vehicles407trucks · 12.6%
Road class
Trunk road
Congestion ratio
8.7%
Median trip time
46.5 min
Drivers’ median age
51.9 yrs
Drivers’ average income
$60,595

Sherman Highway carries 47% more than the county average on its busiest stretch, where the median trip lasts 46.5 minutes.

31st StreetTertiary road · 1,171vehicles68trucks · 5.8%
Road class
Tertiary road
Median trip time
37.1 min
Drivers’ median age
55.1 yrs
Drivers’ average income
$60,962

Trips on 1st Street are short, a median 37.1 minutes against 53.2 county-wide, so it mostly serves local errands and commutes.

4Biggs-Rufus HighwayTertiary road · 1,090vehicles80trucks · 7.3%
Road class
Tertiary road
Congestion ratio
13.2%
Median trip time
55.0 min
Drivers’ median age
53.3 yrs
Drivers’ average income
$60,935

Biggs-Rufus Highway is a quieter road: its busiest stretch carries 50% less than the county average; trucks are 7.3% of it, below the county-wide 19.7%.

5Sam Hill Memorial BridgeTrunk road · 1,030vehicles106trucks · 10.3%
Road class
Trunk road
Congestion ratio
3.1%
Median trip time
32.6 min
Drivers’ median age
53.7 yrs
Drivers’ average income
$59,425

Even at its busiest, Sam Hill Memorial Bridge carries 53% less than the county average; trucks are 10.3% of it, below the county-wide 19.7%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Columbia River HighwayMotorway · #1 by traffic15,246vehicles3,477trucks · 22.8%
2Sherman HighwayTrunk road · #2 by traffic3,222vehicles407trucks · 12.6%
3Sam Hill Memorial BridgeTrunk road · #5 by traffic1,030vehicles106trucks · 10.3%
4Biggs-Rufus HighwayTertiary road · #4 by traffic1,090vehicles80trucks · 7.3%
51st StreetTertiary road · #3 by traffic1,171vehicles68trucks · 5.8%
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

ShermanDepartment 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 Sherman County

The same traffic breakdown for the areas closest to Sherman County, Oregon.

Need segment-level traffic data?

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