A Comprehensive Guide to DOT Inspection: What to Expect and How to Prepare


If you’re a trucker, at some point, you’ll find yourself rolling into a weigh station, and there’s a good chance you’ll be selected for a DOT inspection. These inspections are a routine part of the trucking industry, aimed at ensuring safety and compliance with regulations. In this guide, we’ll take you through the key aspects of a DOT inspection, what inspectors are looking for, and how you can prepare for a smooth inspection process.

The Initial Check

When you enter a weigh station, your truck may get selected for inspection based on various criteria. Here’s what you can expect during the initial phase:

Logbook and Hours of Service (HOS)

One of the first things inspectors will check is your logbook. With the transition to electronic logging devices (E-logs), this process has become more efficient. Inspectors will verify your hours of service and look for any red flags. Make sure you can provide your logs electronically if required.

Logbook and hours of service

Under the Truck Inspection

Inspectors will look under your truck for several critical components:

  1. Air Lines: They check for any rubbing, secure attachments, and signs of wear or damage.
  2. Leaks: While some leaks might not lead to an out-of-service violation, they will notify you if they find any.
  3. Brake Systems: They may measure the brake stroke and check for any out-of-adjustment brakes. Disc brakes, though, are usually exempt from these measurements.

Front-End Inspection

Inspectors will pay close attention to the front end of your truck:

  1. Tires: Tread depth, wear patterns, and overall condition of the tires are inspected.
  2. Steering Mechanism: They check for any play in the steering column and related components.
  3. Suspension and Springs: Inspectors look for signs of wear, damage, or broken components.
Tires should be in good condition

Exterior Inspection

Inspectors will visually examine various external aspects of your truck:

  1. Mirrors: Mirrors must be intact, functional, and correctly positioned.
  2. Lights: They will ensure all lights, including signals, markers, and brake lights, are working correctly. You may need to activate them for inspection.

Interior Inspection

While not always the focus, the cleanliness and organization of your truck’s interior can make an impression on inspectors. A cluttered or dirty cab may raise concerns about your overall vehicle maintenance habits.

Personal Inspection

Believe it or not, inspectors are also looking at you, the driver:

Physical Condition

Inspectors are trained to observe drivers for signs of fatigue, impairment, or any health issues. Be well-rested and alert during an inspection.


Your attitude and behavior can impact the inspection process. Be patient, polite, and cooperative. It can make a significant difference in how smoothly the inspection goes.


DOT inspections are a part of trucking life, and being prepared can make the process much smoother. Keep your logbook and records in order, maintain your vehicle meticulously, and present yourself professionally to the inspectors. By doing so, you’ll not only pass inspections but also contribute to safer roads for everyone. Safe travels!

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