Brake Safety Week 2026 runs August 23 through August 29 across the United States, Canada, and Mexico. It is the headline event of CVSA's Operation Airbrake program, and this year inspectors have a named focus: the condition of brake drums and rotors.
There is a particular kind of quiet that settles over a truck stop as Brake Week approaches. Drivers compare notes about which scales are open. Somebody decides today would be a great day to finally wash their truck. Someone else decides to run a different route, or perhaps not run at all.
Why brakes get their own week
While the specific focus changes from year to year, brakes have a standing appointment on CVSA's enforcement calendar. No pun intended, but turns out brake week can't catch a break. Brakes not only get a dedicated inspection week every August, they also get an unannounced Brake Safety Day at some other point during the year.
Meanwhile, other major inspection events move across different priorities. This May's International Roadcheck focused on ELD tampering and cargo securement while July's Operation Safe Driver Week focused on driving behavior.
However, the 2025 International Roadcheck numbers help explain why. Brake systems accounted for 24.4% of vehicle out-of-service violations, while the separate 20%-defective-brakes category accounted for another 16.7%. Together, brake-related categories represented more than 40% of vehicle out-of-service violations.
Qualitatively, we also get why brakes get their own week. They are the system responsible for bringing as much as 80,000 pounds of moving truck to a stop, and the consequences of a neglected component can extend well beyond the truck itself. Drums and rotors operate under enormous heat and mechanical stress, and cracks, missing material, severe corrosion, and excessive wear are not defects anyone wants to discover at highway speed.
What gets a truck parked
Brake Safety Week inspections are generally conducted as North American Standard Level IV inspections: targeted inspections focused on a particular component or system rather than the full driver-and-vehicle review performed during a Level I. The most common path to a brake-related out-of-service order isn't necessarily one spectacular failure. It's the 20% criterion. Under CVSA's North American Standard Out-of-Service Criteria, a vehicle or combination can be placed out of service when 20% or more of its service brakes are defective.
Some jurisdictions also use performance-based brake testers, or PBBTs, which measure the braking force a vehicle can actually produce. The federal minimum braking efficiency for these tests is 43.5%. During Brake Safety Week in 2025, 15 jurisdictions conducted 528 PBBT inspections, and almost 5% of those tested failed to meet that minimum.
What inspectors are looking for
CVSA published a driver-facing flyer for this year's drum-and-rotor focus. Paraphrased into plain language, here's what they want drivers paying attention to:
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Make drums and rotors part of pre- and post-trip inspections, rather than treating them as components only the shop needs to see.
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Inspect rotor friction surfaces for cracks, missing material, and other obvious damage.
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Look for cracks in drums, particularly cracks extending to an outer edge, as well as broken or missing pieces.
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Pay attention to corrosion on disc-brake rotors. Significant rust across the friction surface can be evidence that the brake isn't doing its share of the work.
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Look for abnormal or excessive scoring on the rotor or drum, which can point to worn friction material or other problems that need further inspection.
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Check rotor wear around the center vents and other manufacturer wear indicators. A rotor worn to or beyond its allowable limits needs to be replaced.
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Repair brake components to the brake manufacturer's specifications rather than relying on "close enough."
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Write defects up. Put them on the DVIR and make sure the carrier has a process for getting them from the inspection into an actual repair.
And while drums and rotors are this year's emphasis, the rest of the brake system is still very much in play. A perfect rotor won't buy much forgiveness if the rest of the system isn't working.
You can't eyeball adjustment
Brake adjustment is ultimately a measurement. Allowable pushrod stroke varies by chamber type and size, which means a brake can hold air, apply normally, and seem perfectly capable of stopping a truck in the yard while still exceeding its allowable stroke. Also, repeatedly adjusting an automatic slack adjuster without finding the underlying cause isn't a maintenance strategy.
This is also where documentation matters. If a fleet is measuring brake stroke before Brake Week, the useful record isn't simply that somebody "checked the brakes." It's which wheel end was checked, chamber type and size, what was measured, what was found, and what happened next.
One in seven
During Brake Safety Week in 2025, inspectors conducted 15,175 brake-focused inspections and placed 2,296 commercial motor vehicles out of service for brake-related violations. That's a 15.1% out-of-service rate. The prior two years produced broadly similar results.
The consistency is worth paying attention to. It doesn't tell us why every individual defect occurred, and fleets operate in very different environments, with different equipment ages, duty cycles, maintenance programs, and exposure to corrosion. What it does tell us is that brake defects serious enough to park a truck continue to show up at a remarkably persistent rate, even during a week the entire industry knows is coming and has time to prepare for.
That's the uncomfortable part of Brake Week. This isn't a surprise inspection. Fleets have months of notice, CVSA publishes the focus area in advance, and shops and drivers know exactly what inspectors are going to spend extra time looking at. Yet roughly one in seven vehicles receiving these brake-focused inspections still ends up out of service.
Violation visibility
Inspection and violation data become part of a carrier's federal safety record and can affect how the carrier is evaluated within FMCSA's safety-monitoring system. Repeated brake problems can also become relevant to insurers, customers, brokers, and, if a serious crash occurs, attorneys trying to understand whether the problem was an isolated event or part of a longer maintenance history.
That last group matters more than it did a few months ago. In May, the Supreme Court unanimously decided Montgomery v. Caribe Transport II, holding that the Federal Aviation Administration Authorization Act does not preempt the plaintiff's state-law negligent-selection claim against a freight broker because the claim fell within the law's motor-vehicle-safety exception. The case involved a broker that had selected a motor carrier with a conditional FMCSA safety rating.
The decision does not mean every broker is liable for every defect on every truck, nor does it dictate what evidence will be discoverable in every lawsuit. What it does mean is that brokers cannot assume federal preemption automatically shields carrier-selection decisions from state-law safety claims. That gives brokers another reason to care about what was knowable when they selected a carrier, including the safety information they reviewed and how they responded to patterns in a carrier's record.
A history of brake out-of-service violations is exactly the kind of pattern that becomes harder to shrug off once somebody asks not just whether a truck was unsafe, but whether there were earlier signals that it might be.
Six days out
So what's a fleet to do? Ideally, most fleets are already in good shape. But with only six days to go, even fleets with strong maintenance programs should be using the week as a reason to audit the loop from inspection to repair.
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Get eyes on every wheel end. Look at drums for cracks and missing material, and rotors for cracking, significant corrosion, abnormal scoring, heat damage, and excessive wear.
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Measure brake stroke using the proper procedure and compare it with the allowable limit for the chamber type and size.
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Walk the air system.
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Fix the cheap stuff. A chafed hose or obvious damaged component shouldn't be the reason an otherwise healthy truck gets parked. Keep the trucks clean.
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Document what was inspected, what was found, what was repaired, and who verified the repair.
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Most importantly, make sure a defect actually travels from the driver's inspection to the person responsible for fixing it.
Conclusion
The real test isn't whether a fleet can inspect every truck before August 23. It's whether the operating loop works the other 51 weeks of the year: a driver identifies a defect, the defect gets recorded, somebody sees it, the right repair gets created, the work gets completed, and there is a record showing that the issue was actually closed.
There's a practical reason to build the process that way. CVSA also conducts an unannounced Brake Safety Day every year. In 2026, it happened on April 14. Inspectors conducted 4,021 commercial motor vehicle inspections and placed 574 vehicles out of service for brake-related violations, a 14.3% rate. That's within a point of the failure rate during the week everybody knew was coming.
The fleets that aren't particularly worried about Brake Week tend to treat it as a checkpoint or a scheduled audit of a system they were maintaining anyway. There is no version of this where a fleet prepares for the week on the calendar and then coasts through the rest of the year.
Brake Week is useful precisely because it puts a date on the calendar. But the fleets with the least to fear from it are the ones for which the date doesn't change very much.