DOT Blitz Week, Shipper Edition: When the Trucks Slow Down and How to Plan Around It

A buyer at a manufacturing client called me last May asking why their Tuesday delivery hadn't arrived. The freight was sitting at a Tennessee scale because the carrier's truck had been parked out-of-service for a brake adjustment violation. The buyer's exact question was: "Is this normal?"

The answer is yes, during certain weeks of the year. And those weeks are public, on the calendar, predictable. The CVSA enforcement weeks compress a lot of inspection activity into 72-hour windows, and during those windows the probability that any given truck gets pulled and parked goes up materially. If you're a shipper — meaning you OWN the freight, not the truck — this hits your inventory levels, your dock schedules, and your customer-promise dates.

Three enforcement weeks in 2026 are worth planning around:

• International Roadcheck — **May 12–14, 2026** (already happened). This year's focus: ELD tampering and cargo securement.
• Operation Safe Driver Week — **July 12–18, 2026**. Driver behavior at the roadside.
• Brake Safety Week — **August 23–29, 2026**. Deep dive on brake systems.

Plus an **unannounced Brake Safety Day** — one 24-hour window in 2026, not pre-announced.

For shippers who plan the supply chain, here's what each one actually means.

What an enforcement week does to your freight

Three downstream effects on your loads:

One: more trucks parked, fewer trucks moving. CVSA Roadcheck typically conducts 50,000+ Level I inspections in 72 hours. Around 20% of vehicles inspected get tagged out-of-service. Those trucks don't move until the violation is corrected — anywhere from 2 hours (loose air-line) to 3 days (brake-chamber replacement on a part-availability lane). At any given moment during Roadcheck, several thousand trucks are sitting at scales instead of delivering freight.

Two: tighter spot capacity. Carriers respond to enforcement weeks two ways. Some carriers (especially smaller fleets with paper-thin compliance margins) voluntarily park during the week, reasoning that a roadside OOS is worse than not running. Others stay on the road but become more conservative. Either way, available capacity tightens. DAT and other rate indices reliably show 4–8% spot-rate increases during major enforcement weeks, more on enforcement-heavy lanes.

Three: late deliveries that aren't your carrier's fault. This is the version of the conversation I want shippers to actually have with their freight teams. A delivery that's late because of an OOS event is a different category of failure than a delivery that's late because the carrier was disorganized. Both end in "the truck didn't get there on time," but the operational signal is different and the contract terms (if you have them) probably treat the two differently.

How to actually plan around them

The brokers and carriers will handle their side. For a shipper, three concrete moves:

Move 1: build inventory buffers around enforcement weeks. If your standard target inventory is N days of cover, the week before Roadcheck or Brake Safety Week, push it to N+2. The math: if average lead time is 3 days and you typically lose 5% of loads to delays, during an enforcement week you might lose 8–10% with longer average delay. A 2-day buffer absorbs that. Most ERP systems support a "demand uncertainty multiplier" or similar; bump it for the weeks in question.

Move 2: avoid scheduling time-critical deliveries through enforcement-week windows when you can. If you're shipping perishables, just-in-time manufacturing inputs, or anything with hard appointment penalties at the consignee, look at the calendar before you book. Roadcheck and Brake Safety Week dates are published months in advance. There's no excuse for scheduling a customer-promise delivery for May 13 that absolutely cannot slip.

Move 3: confirm carrier-vetting standards with your broker (or in-house team) before each enforcement window. This is the part that intersects with the Montgomery v. Caribe Transport II ruling we've covered elsewhere. The Supreme Court held in May 2026 that the FAAAA doesn't preempt state negligent-selection claims against freight brokers. By extension, shippers face the same exposure for in-house carrier selection. If a load goes wrong during Brake Safety Week and the carrier you selected had a Vehicle Maintenance BASIC at 71% beforehand, the lawsuit treats your selection as the proximate question.

A concrete scenario

You're the freight manager at a consumer-electronics importer in Long Beach. You have a recurring high-value lane to a regional DC in Memphis. Loads typically tender out Tuesday for Friday delivery. The week of August 23–29 (Brake Safety Week) lands directly on your normal tender pattern.

Before the week:

• Audit the carrier list your broker is using on this lane. Ask for the CSA pulls (Vehicle Maintenance BASIC percentile, last 12-month OOS history). Any carrier with Vehicle Maintenance over 65% should be off the rotation for this week.
• Confirm the brake-system attestation language is in the carrier-side packet. Your broker should be asking carriers to affirm, in writing, that brake-system inspections have been completed within the last 30 days.
• Build a one-day inventory buffer at the consignee. Tuesday tender, Friday delivery target, but plan for a worst-case Saturday or Monday arrival on a portion of the loads.

During the week:

• Track the tender-to-delivery on every load. A delay that's enforcement-related is still a delay you need to manage. Communicate proactively to your internal customers (production planning, customer service) so they're not blindsided by a slip.

After the week:

• Pull the CSA refresh in mid-September. Any carrier you booked through Brake Safety Week who picked up new violations will show movement in their BASIC percentiles. Use that as part of the next quarterly carrier review.

What this means for your due-diligence file

If you're a large shipper, your in-house carrier-selection process is increasingly the same kind of legal artifact a broker's file is. The Montgomery ruling makes negligent-selection claims actionable against any party in the chain that made the carrier-selection decision. If your team picked the carrier (either directly or by maintaining an approved-carrier list your broker is required to source from), your team's documentation is what gets subpoenaed.

What that documentation should include during enforcement weeks:

• The list of approved carriers as of the week, with each carrier's CSA snapshot at that point in time. (BASIC percentiles, last OOS history, safety rating.)
• The decision rationale for any carrier near or over intervention threshold in a focus area for that specific week.
• Any week-specific attestation language added to the carrier-side packet (cargo securement for Roadcheck, brake system for Brake Safety Week).
• The internal communication around adjusted planning — emails or messages showing your freight team built inventory buffers, shifted tender timing, or other proactive steps.

These aren't bureaucratic paperwork for its own sake. They're the artifacts a plaintiff's lawyer asks for in discovery if a load tendered during a CVSA week ends in a serious crash. The shipper that can show "we knew the enforcement window was happening, we adjusted our carrier list and our planning accordingly, here's the file" is in a meaningfully better position than the shipper that just kept booking as if it were a normal week.

The regulation, in plain English

CVSA enforcement weeks are run cooperatively between CVSA, FMCSA, state DOTs, Transport Canada, and Mexico's SCT under the agencies' general motor-carrier safety authority. The dates and focus areas are publicly announced months in advance. The Out-of-Service Criteria CVSA inspectors apply are codified in the CVSA North American Standard Out-of-Service Criteria handbook (revised annually April 1).

What this means at the supply-chain level: enforcement-week delays are a foreseeable disruption. A shipper that didn't plan for them, when the dates were public and the operational impact is well-documented, is harder to defend in a negligent-selection or breach-of-promise-date situation than a shipper that did.

How I document this (for the shippers I work with)

For shippers I broker for, the documentation pattern I push during enforcement weeks:

1. **A pre-week memo** to the freight team summarizing the enforcement focus, the dates, and the proposed planning adjustments. Even a 5-line internal email counts.

2. **A revised approved-carrier list** for the week, with explicit notes on which carriers were temporarily de-prioritized and why.

3. **A post-week review** comparing tender-to-delivery performance against a non-enforcement-week baseline, with the actual delay-cause attribution (OOS-related vs other).

Three documents, maybe 90 minutes of work per enforcement week. If a load tendered during the week ever ends up in litigation, those three documents are the difference between "the shipper exercised reasonable diligence in light of the enforcement window" and "the shipper did exactly what they always do, with no apparent awareness of the elevated risk."

The post-Montgomery world rewards shippers and brokers who treat their carrier-selection process as a documented operational discipline rather than a gut-feel routine. Enforcement weeks are the easiest place to start, because the dates are public and the disruption is predictable.

— Mason Lavallet

Founder, DOTScreener.com

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Sources

• [CVSA — International Roadcheck 2026 (May 12–14)](https://cvsa.org/news/2026-roadcheck/)
• [CVSA — Operation Safe Driver Week 2026 (July 12–18)](https://cvsa.org/news/2026-osd-week/)
• [CVSA — Brake Safety Week 2026 (Aug 23–29)](https://cvsa.org/programs/operation-airbrake/brake-safety-campaigns/)
• [CVSA — North American Standard Out-of-Service Criteria](https://cvsa.org/inspections/out-of-service-criteria/)
• [FMCSA — Safety Measurement System (SMS) Methodology](https://csa.fmcsa.dot.gov/Documents/SMSMethodology.pdf)
• [Hanson Bridgett — Montgomery v. Caribe Transport II analysis](https://www.hansonbridgett.com/publication/260514_8509_supreme-court-faaaa) — the SCOTUS ruling on negligent-selection liability