Every year, commercial vehicles across North America face a week of intensified scrutiny on one of the most critical safety systems on any truck or bus: the brakes. Brake Safety Week is a coordinated inspection and enforcement campaign that pulls tens of thousands of trucks off the road for close inspection, and it consistently reveals just how many vehicles are operating with brake systems that don't meet minimum safety standards. For drivers, fleet managers, and safety directors, understanding what this week involves — and preparing for it well in advance — can be the difference between a routine inspection and a costly out-of-service order.
This article breaks down what Brake Safety Week is, who runs it, what inspectors actually look for, why brakes matter so much to commercial vehicle safety, and how drivers and carriers can get ready.
What Is Brake Safety Week?
Brake Safety Week is an annual, seven-day inspection and enforcement initiative organized by the Commercial Vehicle Safety Alliance (CVSA), a nonprofit alliance of commercial motor vehicle safety officials and industry representatives across the United States, Canada, and Mexico. During the campaign, certified inspectors conduct roadside inspections that place special emphasis on brake systems and components, in addition to the standard checks performed during any commercial vehicle inspection.
For 2026, CVSA has set Brake Safety Week for August 23–29, and both the CVSA calendar and the Federal Motor Carrier Safety Administration's outreach calendar confirm the same dates. Throughout that week, trained inspectors in all three countries conduct routine commercial motor vehicle inspections with a focus on brake systems, and vehicles found with brake-related out-of-service violations — or any other out-of-service violations — are removed from the road until the problems are corrected.
Part of a Larger Program
Brake Safety Week doesn't stand alone. It's the flagship event within CVSA's broader Operation Airbrake program, a partnership with the Federal Motor Carrier Safety Administration aimed at reducing crashes caused by faulty or poorly maintained brake systems. Operation Airbrake runs two enforcement campaigns each year: the announced, weeklong Brake Safety Week, and an unannounced one-day brake safety enforcement initiative that can happen at any point during the year without advance notice. The unannounced format is meant to capture a more representative snapshot of everyday brake conditions, since carriers can't specifically prepare for it the way they might for the publicized week.
Why Brakes Get Their Own Campaign
Brakes are singled out for their own dedicated inspection week because brake-related problems are consistently among the most common — and most dangerous — defects found on commercial vehicles. Six of the top 20 vehicle violations reported by the Federal Motor Carrier Safety Administration in 2025 involved defective, worn, or out-of-adjustment brakes. During CVSA's International Roadcheck, a separate three-day inspection blitz covering all aspects of commercial vehicles, brake violations accounted for nearly a quarter of all out-of-service violations. Given how directly brake performance affects a vehicle's ability to stop safely, regulators treat this as one of the highest-priority safety issues on the road.
What Inspectors Check During Brake Safety Week
During Brake Safety Week, CVSA-certified inspectors primarily conduct Level IV inspections, which are focused, one-time examinations that concentrate on a particular item — in this case, the brake system — rather than the full battery of checks performed during a standard Level I inspection.
Standard Brake System Checks
Regardless of the year's special focus area, inspectors always examine the fundamentals of the brake system, including:
- Brake adjustment, to confirm that brakes fall within allowable adjustment limits so braking force is balanced across the vehicle
- Air and hydraulic leaks in lines, hoses, and tubing
- Condition of hoses and tubing for cracking, wear, or improper routing
- Low-air warning devices, to make sure drivers are alerted if air pressure drops to unsafe levels
- Tractor protection systems, which automatically apply brakes if the tractor and trailer become separated
- Anti-lock braking system (ABS) function
- Brake chamber hardware and mounting
Inspectors also apply what's known as the 20% out-of-service criterion. Under this rule, if 20% or more of a vehicle's — or combination vehicle's — service brakes are found to be defective, the vehicle is placed out of service until repairs are made. This single criterion is consistently the most common reason a vehicle receives a brake-related out-of-service order during Brake Safety Week.
2026's Special Emphasis: Drums and Rotors
Each year, CVSA highlights a specific brake component or issue for additional attention, without reducing the scope of the rest of the inspection. For the second consecutive year, the 2026 campaign places special emphasis on brake drums and air disc brake rotors, examined under the standards set out in 49 CFR §393.47. Inspectors will look closely at the physical condition of drums and rotors — including cracks, excessive wear, and other structural issues — because damaged components not only reduce stopping power but can, in more severe cases, fail or shed pieces while the vehicle is in operation.
Performance-Based Brake Testing
At some inspection sites, officers supplement the visual inspection with Performance Based Brake Testers (PBBTs). A PBBT is a machine that measures actual braking performance rather than relying solely on a visual assessment. These devices — which include roller dynamometers and flat-plate brake testers — measure the brake force generated at each wheel end, axle, or across the entire vehicle, and they can do so regardless of whether the vehicle uses disc or drum brakes. This gives inspectors an objective, data-driven picture of how well a vehicle's brakes are actually performing, rather than just how they look.
Why Brake Safety Matters
The rationale behind Brake Safety Week isn't abstract. Brakes are the primary system standing between a loaded commercial vehicle and a preventable crash, and the data collected during past campaigns illustrates just how often that system falls short of minimum standards.
The Scale of the Problem
During the 2025 Brake Safety Week, more than 15,000 commercial vehicles were inspected across the participating jurisdictions, and 15.1% were placed out of service specifically for brake-related violations — up from a 13% rate in 2024. Put another way, roughly one in every seven or eight trucks inspected during the week had brake defects serious enough to be pulled from the road. Even during the CVSA's unannounced one-day brake safety initiative, out of over 4,000 vehicles inspected, 574 — about 14.3% — were restricted from travel due to brake-related out-of-service violations, a jump from an 8.7% rate the year before.
The Financial and Operational Stakes
Beyond the immediate safety risk, a brake-related out-of-service order carries real consequences for carriers and drivers. An out-of-service violation feeds directly into a carrier's Compliance, Safety, Accountability (CSA) score under the Vehicle Maintenance BASIC category, which can affect everything from a carrier's standing with regulators to its insurance premiums. Carriers whose CSA scores rise above the intervention threshold often see meaningfully higher insurance costs at renewal, while carriers that maintain clean inspection records can see the opposite effect. There's also the more immediate operational cost: a vehicle placed out of service can't move until repairs are made and verified, which means delayed deliveries, idle equipment, and lost revenue — on top of the repair bill itself.
How Drivers and Fleets Can Prepare
CVSA has been consistent in framing Brake Safety Week not as a "gotcha" campaign designed to catch drivers off guard, but as a reminder of practices that should already be part of routine operations. Preparing well ahead of the announced week — rather than scrambling in the days before it — is the approach most safety professionals recommend.
For Drivers: Strengthen the Pre-Trip Inspection
A thorough pre-trip inspection takes only a few extra minutes but is one of the most effective tools a driver has for catching brake problems before they become violations — or worse, safety incidents on the road. During a pre-trip check, drivers should:
- Visually inspect brake drums and rotors for cracks, heat discoloration, or excessive wear
- Check slack adjusters and confirm brakes are within proper adjustment limits
- Listen for air leaks and check that air pressure builds and holds properly
- Test the low-air warning system and confirm it activates at the correct pressure
- Inspect brake hoses and lines for cracking, chafing, or improper routing
- Confirm the tractor protection valve functions correctly
For Fleets: Build Brake Maintenance Into Routine Operations
CVSA and industry safety experts consistently emphasize that brake safety shouldn't be treated as a once-a-year concern that gets attention only when an enforcement campaign is on the calendar. Brake components wear down steadily over time due to heavy loads, frequent stops, weather exposure, and everyday use, and small issues can escalate quickly into costly repairs or roadside violations if they aren't caught early.
Fleets that consistently perform well during Brake Safety Week tend to share a few habits:
- Documented, scheduled preventive maintenance programs rather than reactive repairs
- Regular in-house brake inspections that mirror what a roadside inspector would check
- Prompt repair of identified issues rather than deferring maintenance
- Parts inventory tracking, so worn components like pads, drums, or rotors can be replaced without extended downtime
- Driver training that reinforces thorough pre-trip and post-trip inspection habits
Treating brake maintenance as a continuous, year-round discipline — rather than a seasonal scramble — is what separates fleets that pass Brake Safety Week without incident from those that get caught off guard.
Frequently Asked Questions
When is Brake Safety Week 2026, and how long does it last?
Brake Safety Week 2026 is scheduled for August 23 through August 29, a seven-day period confirmed by both CVSA's official announcement and the Federal Motor Carrier Safety Administration's outreach and education calendar. Unlike CVSA's unannounced one-day brake safety enforcement initiative, which can occur at any point in the year without warning, Brake Safety Week is publicized well in advance specifically so that drivers and fleets have the opportunity to prepare their vehicles beforehand. The seven-day window applies across all three participating countries — the United States, Canada, and Mexico — although the exact number of jurisdictions actively participating, and the intensity of enforcement in each one, can vary somewhat by state, province, and territory. Because the dates are set annually and can shift slightly from year to year, carriers should check CVSA's official announcements or FMCSA's calendar each year rather than assuming the same week applies going forward.
What is the 20% out-of-service criterion, and why does it matter so much?
The 20% out-of-service criterion is the single most common reason a commercial vehicle is placed out of service during Brake Safety Week. Under this rule, if 20% or more of a vehicle's — or a combination vehicle's — service brakes are found to be defective during an inspection, the entire vehicle is placed out of service, regardless of whether other individual violations would have been serious enough to warrant that on their own. The logic behind the rule is that braking performance is a system-wide property: even if the majority of brakes on a vehicle are functioning correctly, a significant enough proportion of defective brakes reduces overall stopping power and shifts braking force unevenly across axles, which can affect vehicle stability and stopping distance in ways that individual defects might not fully capture. This is why fleets are encouraged to check the condition of every brake on a vehicle, not just address the most visibly worn ones, since a combination of several moderately worn brakes can trigger the same result as one badly failed brake.
Why are drums and rotors the specific focus for 2026, and what happens if they're damaged?
CVSA selects a specific brake component or issue to highlight each year as part of Brake Safety Week, and for the second year running, that focus is on brake drums and air disc brake rotors, evaluated under the federal standards in 49 CFR §393.47. Drums and rotors are the components brake pads and shoes press against to generate friction and slow the vehicle, so their physical condition directly affects how much stopping power a vehicle can generate. Inspectors look for cracks, excessive wear, heat damage, and other structural problems. Damaged drums and rotors are a safety concern for two separate reasons: first, they reduce the vehicle's overall braking efficiency, which can mean longer stopping distances; and second, in more severe cases, a badly cracked or structurally compromised drum or rotor can fail outright or shed pieces while the vehicle is moving, creating a road hazard independent of the braking problem itself. This dual risk — reduced performance plus potential mechanical failure — is part of why CVSA has kept this focus area in place for a second consecutive year rather than rotating to a different component.
What actually happens to a truck and driver if it's placed out of service for a brake violation?
When an inspector identifies a brake-related violation serious enough to trigger an out-of-service order — whether through the 20% criterion, a single severe defect, or another disqualifying issue — the vehicle is not permitted to continue operating until the problem is corrected and the vehicle is re-inspected or otherwise cleared. Practically, this usually means the truck is parked at or near the inspection site, and the carrier has to arrange for a repair, which can range from a relatively quick fix like replacing worn brake pads to a more involved repair like replacing a cracked rotor or drum. Beyond the immediate delay and repair cost, the violation is recorded and factored into the carrier's Compliance, Safety, Accountability (CSA) score under the Vehicle Maintenance BASIC category. That score is visible to enforcement agencies and can influence how frequently a carrier's vehicles are selected for inspection going forward. It can also affect insurance: carriers whose CSA scores climb above intervention thresholds frequently see higher premiums at renewal, while carriers with clean records may see reduced rates. In other words, the consequences of an out-of-service brake violation extend well beyond the hours lost at the roadside.
Is Brake Safety Week only relevant to large trucking fleets, or does it apply to smaller operators and owner-operators too?
Brake Safety Week applies broadly to commercial motor vehicles operating in the United States, Canada, and Mexico, which means it's just as relevant to independent owner-operators and small carriers as it is to large fleets. Inspectors don't limit their attention to vehicles from major carriers — any commercial truck or bus that meets the criteria for a roadside inspection, regardless of the size of the company operating it, can be pulled in for a brake-focused check during the campaign week. In some respects, the stakes can be even higher for smaller operators and owner-operators, since a single out-of-service violation represents a much larger share of their operating capacity than it would for a fleet with hundreds of trucks, and the CSA score impact is applied at the carrier level regardless of fleet size. For an owner-operator, this makes the pre-trip inspection habits described earlier — checking brake adjustment, inspecting drums and rotors for visible damage, listening for air leaks, and testing warning systems — especially important, since there may not be a dedicated maintenance team to catch problems before they reach the road. Preparing early, rather than waiting for the announced week, is generally the most practical way for smaller operators to avoid downtime during the campaign.
