Oklahoma's I-35 Weigh Station Upgrade Will Read Your Tires, Weight and Height

What Oklahoma is building on I-35

The Oklahoma Department of Transportation has handed Quarterhill a 5.25 million dollar contract to rebuild the screening technology at an existing weigh station on Interstate 35, as The Trucker reported on July 31, 2026. Deployment was set to start in August. The package is not just a new scale. It includes mainline and ramp sorter systems, weigh in motion, electronic screening, a Tire Anomaly Classification System, and dimensioning equipment that measures the size of a passing truck. ODOT described it as part of a broader modernization that also covers roadway work at a commercial vehicle inspection site.

I-35 is the state's main north and south freight spine, carrying loads between Texas, Oklahoma City and Kansas. If you run that corridor, this station is going to know more about your truck than you might expect. That changes the math on a few problems that used to slide by, and each one ties straight back to what you pay for commercial truck insurance in Oklahoma.

How mainline screening sorts trucks

Weigh in motion sensors sit in the pavement and estimate axle and gross weights while the truck is still moving. Paired with a sorter system, the station decides which trucks get waved past and which get pulled onto the static scale or into the inspection bay. On interstates the federal ceilings are 20,000 pounds on a single axle, 34,000 pounds on a tandem and 80,000 pounds gross unless a permit says otherwise. A truck that reads heavy on the mainline gets a closer look, and a truck that is actually over gets a citation and possibly an order to shift or offload before it moves again.

For an owner operator the cost is not only the ticket. An overweight load is a loaded truck that takes longer to stop and works its brakes and tires harder. If that truck is later in a crash, the weight record becomes part of the story, which is why carriers that run heavy usually see it reflected in their commercial auto liability pricing.

Tires are now part of the screen

The tire anomaly piece is the part most drivers have not run into yet. As the name says, the Tire Anomaly Classification System is there to pick out tire problems as trucks cross the sensor. A soft tire on a loaded trailer builds heat, and heat is what turns into a blowout and a tread strike on the car behind you. A station that can catch that before the truck gets back on the mainline is a station that will write more tire violations, and those violations land in your inspection history.

The fix is boring and cheap. Check pressures cold, every pre trip, on every position including the inside duals that are a pain to reach. Replace tires with cuts or bulges instead of running them to the next terminal. A blowout that throws debris or sends you across a lane is a liability claim, and the damage to your own wheel end, fender and trailer falls under physical damage coverage only if you carry it.

The height check and the Will Rogers Turnpike lesson

Dimensioning means the station measures height, width and length on the move. Oklahoma has a recent reason to care. On December 16, 2025, a truck carrying a load the Oklahoma Turnpike Authority called illegally over height ran the I-44 Will Rogers Turnpike from Tulsa toward Miami and struck six county bridges over the road, according to CDLLife. Those bridges had clearances between 14 feet 11 inches and 15 feet 4 inches, and four of them were closed afterward. Nobody was hurt. The authority reminded drivers that anything taller than 14 feet needs a permit and an approved route on the state highway system.

Think about who pays for that. Damage to bridges is property damage to a third party, which is a liability claim. Whatever was on the trailer may be damaged too, which is a motor truck cargo question. And a load moved over height without the permit gives an underwriter a reason to look hard at the whole account. Measure your loaded height before you leave the yard, especially on flatbed and equipment loads, and get the permit when you need one.

What to do before you cross that scale

Keep axle weights legal and know your scaled weights, keep tires inflated and inspected, and measure height on anything that sits tall. Clean inspections are the cheapest way to hold your premium down, because underwriters price the record the scale house builds. If your current carrier is pricing you like the problem driver on I-35, it may be time to shop. See how rates work on our page for Oklahoma truck insurance, then get a truck insurance quote in under a minute here, or call or text 423-264-4255 and talk to a person who knows the lane.