Commercial trucks make up a substantial share of traffic on some of America’s busiest freight highways. On certain rural interstate sections, they account for nearly half the vehicles on the road. Elsewhere, thousands of tractor-trailers travel through metropolitan areas where local deliveries, long-haul freight, and passenger traffic all use the same highway.

The concentration of truck traffic varies considerably across the interstate system. Highways connecting major shipping facilities and industrial regions can carry heavy commercial volumes for hundreds of miles, while others experience their greatest activity around specific junctions.

Several routes stand out for their unusually high truck percentages, substantial daily commercial traffic, and distinctive roles in moving freight across the country.

Interstate 81 in Virginia Has an Exceptionally High Share of Truck Traffic

Interstate 81 is one of the country’s most prominent examples of a highway where commercial vehicles account for a substantial portion of daily traffic.

The Virginia Department of Transportation reports that more than one-third of the trucks traveling on Virginia’s interstates use I-81. The 325-mile corridor also carries nearly half the value of goods transported through the state.

The concentration is particularly apparent near Roanoke. On a nine-mile section between exits 128 and 137, VDOT reports daily traffic ranging from 51,000 to 56,000 vehicles, with heavy trucks representing approximately 28%.

That amounts to roughly 14,000 to 15,700 heavy trucks per day along the section, based on the agency’s published traffic figures.

Unlike interstate routes that pass directly through major coastal cities, I-81 serves an inland corridor connecting the Southeast with Pennsylvania and New York. Its location makes it an important route for long-distance freight traveling between southern distribution markets and the Northeast.

The highway’s terrain also influences commercial traffic. Virginia has invested in dedicated truck-climbing lanes and additional roadway capacity to accommodate heavy vehicles traveling through mountainous sections.

In January 2026, Virginia approved an updated corridor improvement plan identifying additional projects. The work builds on an earlier program that includes widening, interchange improvements, and other changes along the route.

Interstate 40 in Oklahoma Carries More Than 10,000 Freight Vehicles Daily

Interstate 40 crosses Oklahoma from west to east, connecting long-distance freight moving between the Southwest and southeastern United States.

Outside the Oklahoma City metropolitan area, the Oklahoma Department of Transportation reports approximately 6,000 to 8,000 freight vehicles traveling on I-40 each day. Volumes exceed 10,000 daily in central Oklahoma.

The proportion of commercial traffic is especially striking on rural stretches, where the agency reports locations with one truck for every two vehicles.

That concentration gives I-40 a distinctly commercial character even in areas without large surrounding populations. A highway can carry fewer total vehicles than an urban interstate while still having a much higher percentage of tractor-trailers.

Oklahoma City also marks the intersection of I-40 and I-35, creating an important connection between east-west and north-south freight movement.

The commercial presence continues beyond Oklahoma. I-40 serves long-distance transportation across Arizona, New Mexico, Texas, Arkansas, Tennessee, and North Carolina, with major connections around Memphis, Nashville, and Knoxville.

Interstate 75 and Interstate 285 Carry Heavy Truck Volumes Around Atlanta

Atlanta’s interstate system handles an unusually concentrated combination of regional distribution and long-distance freight traffic.

The Atlanta Regional Commission identifies three of the region’s highest-volume truck segments: I-75 northwest of I-285, the western portion of I-285 between I-75 and I-85, and I-85 northeast of the perimeter.

These routes serve different commercial movements. I-75 connects freight traveling between Florida, the Southeast, and the Midwest, while I-85 carries traffic toward the Carolinas and other East Coast markets.

I-285 adds another important function. Georgia restricts certain through-truck movements on interstate routes inside the perimeter, directing commercial traffic around central Atlanta unless a destination or other qualifying circumstance permits the trip.

The result is a network where substantial truck activity is concentrated around the perimeter and its major interstate connections.

Recent regional research also provides a closer look at the surrounding freight activity. A June 2026 Atlanta Regional Commission study of the Gateway85 industrial area identified more than 304,000 average daily truck journeys associated with the study area, including inbound, outbound, internal, and through movements.

That figure covers the broader freight cluster and its modeled movements, not the number of trucks passing a single interstate counting station. It nevertheless illustrates the scale of commercial activity generated by one of Atlanta’s major industrial districts.

Interstate 710 in California Has a Different Kind of Truck Traffic

Not every heavily traveled trucking highway carries freight across several states. Interstate 710 in Southern California is a comparatively short route with an unusually important role in container transportation.

The highway connects the Port of Long Beach and nearby Port of Los Angeles freight facilities with the Los Angeles-area highway and distribution network.

Its southern sections carry substantial numbers of container-hauling trucks traveling between marine terminals, rail facilities, warehouses, and other freight destinations.

Research examining the I-710 corridor has cited earlier Los Angeles County planning data indicating more than 200,000 total vehicles per day on portions of the route, with heavy-duty diesel container trucks accounting for approximately 34% of traffic.

Those historical figures are not a current corridor-wide truck count, but they illustrate the extraordinary commercial concentration associated with the port-serving highway.

I-710 also differs from longer interstate freight corridors because much of its truck activity involves relatively short movements between transportation facilities. A truck may travel only part of the highway while carrying a container that has already crossed the Pacific Ocean.

The route’s importance comes from its direct connection to one of the nation’s largest international shipping gateways, rather than its length.

Interstate 35 Combines Cross-Border and Domestic Freight

Interstate 35 provides a major north-south connection from Laredo, Texas, to Duluth, Minnesota.

Its southern end serves one of the country’s most important commercial border regions, where trucks transport goods between Mexico and the United States.

Farther north, the highway passes through San Antonio, Austin, Dallas-Fort Worth, Oklahoma City, Kansas City, and the Minneapolis-St. Paul region. These markets contribute manufacturing, agricultural, retail, and distribution freight to the corridor.

The amount of truck traffic changes along the route. Oklahoma DOT reports that I-35 commercial volumes increase from north to south within Oklahoma, reaching their highest levels around Oklahoma City.

The highway also intersects several major east-west routes, including I-10, I-20, I-40, I-70, and I-80. Those connections allow freight entering through Texas to move toward markets well beyond the I-35 corridor.

Its combination of international and domestic commercial traffic makes I-35 especially important to freight moving through the central United States.

Interstate 5 Connects West Coast Ports and Agricultural Regions

Interstate 5 runs through California, Oregon, and Washington, connecting major West Coast freight markets from the Mexican border to the Canadian border.

Southern California’s port and warehouse network generates significant commercial activity near the highway’s connections with other regional freight routes.

Farther north, I-5 passes through California’s Central Valley, where agricultural shipments contribute to commercial traffic alongside manufactured products and consumer goods.

The highway continues through Sacramento, Oregon’s Willamette Valley, and Washington’s Puget Sound region. Its connections serve both long-distance freight and shorter movements between ports, warehouses, and regional markets.

Unlike the heavily concentrated port-container activity on I-710, commercial traffic on I-5 is distributed across a much longer corridor with several distinct freight-producing regions.

Its north-south alignment also provides a continuous interstate connection between the principal population and distribution markets of the Pacific Coast.

How These Trucking Highways Compare

<text color=”secondary” size=”sm”>The figures below describe specific highway sections or corridors, not uniform traffic levels across entire interstate routes.</text>

Why Some Highways Have More Trucks Than Passenger Vehicles

The percentage of commercial vehicles on a highway can be just as revealing as its total traffic count.

A busy urban freeway may carry more vehicles overall, but passenger traffic can make up the overwhelming majority. On rural freight routes, trucks may represent a much larger share of the vehicles traveling in either direction.

That difference is particularly evident on I-40 in Oklahoma and I-81 in Virginia. Both carry substantial commercial traffic outside the country’s largest metropolitan areas.

The type of freight also affects how commercial traffic is distributed. Port-serving highways such as I-710 can experience intense truck activity over relatively short distances, while cross-country routes support long-haul shipments spread across multiple states.

These patterns explain why the country’s busiest trucking highways aren’t necessarily the same as its busiest highways for all vehicles. Commercial traffic follows freight demand, which can be concentrated far from major population centers.

The highways highlighted here represent different sides of that activity: exceptionally high truck percentages, major interstate freight junctions, international trade connections, and specialized port transportation. Together, they show how widely commercial traffic patterns vary across the national highway system.

Frequently Asked Questions

Which interstate in Virginia carries the largest share of the state’s truck traffic?

According to VDOT, I-81 carries more than one-third of the trucks traveling on Virginia’s interstate highways. It also transports nearly half the value of goods moving through the state.

Why does Interstate 710 have so much commercial truck traffic?

I-710 connects the Los Angeles and Long Beach port area with inland freight facilities and other major highways. Its role in container transportation produces substantial truck activity despite its relatively short length.

Are highways with high truck percentages always the busiest for commercial traffic?

No. A rural highway can have a high percentage of trucks but fewer total commercial vehicles than a major urban freeway. Both the percentage of trucks and the daily number of commercial vehicles are needed to understand the difference.

Where can official truck traffic counts be found?

State transportation departments publish vehicle classification counts and traffic maps for individual highway sections. Virginia, Oklahoma, California, and other states maintain public traffic monitoring resources, although the available reporting years and vehicle categories can differ.

The TDUSA editorial team creates practical, driver focused content covering trucking news, industry updates, safety, regulations, and career information for professional truck drivers across the United States. Each article is built to reflect real world experience, industry developments, and information drivers can use on and off the road.

Last Updated: November 4, 2026