Inspection & Violation Trends Analysis

Analysis

· as of June 1, 2026

The most consequential pattern in this dataset is the sharp and sustained rise in the driver out-of-service rate, which has moved in a distinctly different direction from vehicle OOS rates over the past two years. While vehicle OOS rates have oscillated in a relatively narrow band — 13.3% at their low point in December 2022 and 16.1% in August 2025 — the driver OOS rate has followed a steeper trajectory, climbing from roughly 4.6% to 4.9% throughout 2023 and 2024 before accelerating markedly in spring 2025. By July 2025, the driver OOS rate stood at 7.12%, compared to 4.92% in July 2024, a year-over-year increase of more than 2 percentage points on a base that had itself already edged upward. The August 2025 reading of 7.15% represents the highest driver OOS rate in the 60-month series. This divergence between vehicle and driver compliance trends is worth examining separately: vehicle defect rates appear to reflect relatively stable fleet maintenance behavior, while the driver-side deterioration suggests pressure on hours-of-service compliance, licensing, or medical certification — the data alone cannot distinguish between these causes. The average driver OOS rate over the trailing 12 months was 6.6%, compared to approximately 4.9% in the prior 12-month period, a shift consistent with either heightened enforcement targeting driver violations specifically or a degradation in the driver compliance baseline across the carrier population. Inspection volumes have also grown: April and May 2025 each exceeded 261,000 and 263,000 inspections respectively, well above the 214,855 and 249,729 recorded in the same months of 2023. Higher inspection volumes, if concentrated in lower-severity encounters, could mechanically suppress some rates, but driver OOS rates have risen despite this, suggesting the trend reflects genuine compliance conditions rather than a compositional artifact. The overall violation rate has been broadly stable, averaging 56.5% over the trailing 12 months versus 55.3% in the prior period — a modest change relative to the driver OOS movement. Across the full five-year window covering roughly 9.5 million inspections and 15.3 million violations, the driver OOS trend is the clearest directional departure from an otherwise range-bound dataset.