If you operate a commercial motor vehicle (CMV), you are subject to Department of Transportation (DOT) truck inspections in Maryland and across the U.S. to ensure you and your vehicle meet federal safety standards. These inspections are conducted by certified federal or state inspectors to verify driver qualifications, Hours-of-Service (HOS) compliance, and to confirm that critical vehicle systems (brakes, tires, lights, cargo securement, etc.) are roadworthy.
What does this mean for you and your vehicle as a Maryland truck driver? In addition to keeping roadways safe, DOT compliance minimizes your risk of fines and downtime due to out-of-service (OOS) issues. This is why HSA Service Center conducts thorough, systematic pre-trip and post-trip inspections to help you pass your next DOT/PMI inspection, including Maryland state inspections, so you can stay compliant and keep your vehicle moving.
In this blog, we’ll share a practical DOT inspection checklist for Maryland truck drivers from industry experts (linked below), along with a breakdown of the different types (levels) of inspections, so you’ll know how to prepare for your next inspection and what to expect.
Levels of DOT Inspections
Here’s a breakdown of the different types of DOT inspections, referred to as “levels,” from the Commercial Vehicle Safety Alliance (CVSA) and from trucking carriers like Fortune Carriers, Inc.
Level 1 – Full Inspection (Driver + Vehicle)
The Level 1 DOT inspection is the most common type of roadside inspection and it’s one of the most thorough.
What happens: An officer inspects both the driver (CDL/endorsements, medical status, HOS/ELD, shipping papers as applicable) and the vehicle bumper-to-bumper (brakes, tires/wheels, lights, steering/suspension, exhaust/fuel, coupling, cargo securement, etc.).
How long it takes: Be prepared for a long inspection, typically 45 to 60 minutes. Expect a walk-around plus under-vehicle checks.
Driver tips: Arrive with documents ready (license, medical status confirmation, ELD transfer know-how, registration/insurance). Do a meticulous pre-trip DOT/PMI inspection so you’re not discovering defects at the scale.
Level 2 – Walk-Around Driver/Vehicle Inspection
What happens: This inspection will require providing the same driver credentials as Level 1, but the officer performs an external inspection without going under the vehicle.
How long it takes: Level 2 is a faster roadside check (typically 30 to 45 minutes), compared to a Level 1 inspection.
Driver tips: Expect the inspector to look for clean working lights, proper tire condition/inflation, obvious leak checks, and visible cargo securement.
Level 3 – Driver-Only Inspection
What happens: In a Level 3 DOT inspection the focus is on you and your paperwork. The inspector is looking for CDL/endorsements, medical qualification, HOS/ELD records, trip documentation, and any required hazmat credentials.
How long it takes: Generally this is the shortest level (15 to 30 minutes), as there is no vehicle inspection.
Driver tips: Know how to display or transfer ELD data, keep permits/registration/insurance organized, and check your medical status ahead of time.
Level 4 – Special Inspections
What happens</strong: This type of DOT inspection is rare. It’s a targeted, one-time check of specific components (e.g., brake linings) or a particular safety focus during an enforcement initiative.
How long it takes: The length of time varies with the scope of the inspection.
Driver tips: If you’re notified of a targeted enforcement initiative (like brakes or cargo securement), double-check those items before arrival.
Level 5 – Vehicle-Only Inspection
What happens: This is a complete vehicle inspection without the driver present, often at carrier facilities or after a crash investigation.
How long it takes: Expect a systematic inspection similar to a Level 1 for your vehicle (up to an hour).
Driver tips (for fleets/owners): Keep your preventative maintenance records current, such as your last pre-trip DOT/PMI inspection. If your truck can pass a Level 5, you’re in excellent shape for any roadside vehicle portion.
Level 6 – Enhanced Inspection for Radioactive Shipments
What happens: The Level 6 inspection is only required for certain hazmat loads, primarily radioactive materials (Class 7). This inspection follows stricter protocols, additional paperwork, and enhanced vehicle checks. A special decal may be applied after passing.
How long it takes: These inspections take longer (at least an hour), due to the added requirements.
Driver tips: Verify route plans, shipping papers, placards, emergency response information, and special training/permits well before you arrive.
Note: In Maryland, weigh and inspection facilities are maintained by MDOT SHA, operated by Maryland State Police (MSP)/MDTA Police, and mobile inspections occur statewide. See the MDOT website for more information for Maryland truck drivers.
Complete DOT Inspection Checklist
Here is a complete DOT inspection checklist from the CSVA and the Code of Federal Regulations for both driver and vehicle requirements at a Level 1 inspection (the most common type of DOT inspection). Every Maryland truck driver should expect the inspector to cover the items listed below.
Driver Documentation
- CDL and endorsements appropriate for the vehicle/commodity.
- Medical examiner’s certificate (medical qualification tied to CDL record and carry rules).
- HOS/RODS and ELD records are available and compliant.
- Vehicle registration and insurance are readily available (driver credentials and vehicle documents are part of Level 1, 2, and 3 checks).
Truck Exterior
- Tires: No exposed ply/belt, cuts, or bulges. Check legal tread depth; there should be no flats/dual contact. And check for proper inflation.
- Wheels/rims: No cracks, missing, or loose fasteners.
- Lights and reflectors: Headlamps, turn signals, brake, clearance/marker lamps, and required reflectors should be operating and present.
- Windshield wipers and mirrors: Inspectors are looking for functional wipers/washer with required mirrors in good condition.
Truck Interior
- Seat belts: Are they present and functioning? (Driver restraint is checked at Level 1, 2, and 3.).
- Horn: Obviously, it should be operational.
- Gauges/indicators: Check oil pressure, temperature, fuel, and ensure that ABS indicators are operating per the original equipment manufacturer (OEM). (Part of general safe-operation requirements.)
- Emergency equipment: Properly rated fire extinguisher, reflective triangles (or road flares where permitted), and spare fuses (unless circuit breakers).
Brakes and Suspension
- Brakes: There should be no audible air leaks. Checking adequate lining thickness and that there are no cracked drums/rotors. There should be no out-of-adjustment brakes per Part 393.
- Suspension: Looking for sound leaf springs/airbags and no broken hangers, U-bolts, or leaking shocks. (Inspected under Levels 1 and 2.)
Engine and Driveline
- Fluids: Checking that oil, coolant, and transmission are at proper levels and that caps are secure. (Safe condition under Part 396.)
- Leaks: No active fuel, oil, or coolant leaks.
- Driveline: Are U-joints/yokes free of play? Are they properly lubricated? Guards should be in place as required. (Inspected at Levels 1 and 2.)
Exhaust and Fuel Systems
- Exhaust: Secure, not leaking into the cab? There should be no loose/missing components.
- Fuel system: Lines/hoses should be secured with no leaks or chafing. (Levels 1 and 2 items.)
Additional Trailer Checks
- Coupling devices: Fifth-wheel/kingpin should be secure, with safety latches and airlines properly connected. (Levels 1 and 2.)
- Trailer brakes: Operational, with no leaks? Glad-hands and valves need to be in good condition.
- Trailer lights/reflectors: Are all required lamps/reflectors working and present?
- Cargo securement: Must meet FMCSA Subpart I to prevent loss or shift.
Common Reasons for Failing DOT Inspections
The most frequent OOS issues found during nationwide DOT inspections include defective service brakes, lighting violations, tire defects, and HOS/driver-document problems. CVSA’s latest International Roadcheck reported defective brakes as the top vehicle OOS violation across North America, with HOS leading driver OOS.
Poor cargo securement and fluid leaks also trigger citations and OOS orders. Addressing these areas in pre-trip/post-trip inspections at professional service centers can help you reduce these risks.
Preparing for a DOT Inspection in Maryland
- Do thorough daily pre-trip/post-trip inspections and fix defects promptly (Part 396 requires systematic inspection, repair, and maintenance).
- Keep documents current and accessible. This includes CDL/endorsements, medical qualification status, HOS/ELD records, and vehicle registration/insurance.
- Plan around weigh and inspection facilities. Maryland operates multiple fixed locations and mobile enforcement statewide, maintained by MDOT SHA and operated by MSP/MDTA Police.
- Schedule regular preventive maintenance to catch wear on brakes, tires, lights, suspension, and leaks before roadside inspection. (These components dominate OOS findings.)
How HSA Service Center Helps Maryland Truck Drivers
Located in Hagerstown — right off I-70 (Exit 29B) near the I-81 corridor — HSA Service Center (formerly Hagerstown Spring & Alignment, Inc.) performs PMI/DOT inspections, brake service, suspension and driveline work, alignments, electrical and engine diagnostics, and full truck and trailer repairs for single units or fleets.
HSA also operates a state-of-the-art paint and body facility sized for tractor-trailers. Fast turnarounds, experienced technicians, and fleet-friendly scheduling help you stay compliant and maximize uptime. Contact us online to learn more. Our address:
Address: 1423 Oakmont Dr., Hagerstown, MD 21740 • Phone: 301-733-4507
Staying inspection-ready protects your schedule, your customers, and your CSA standing. Use this DOT truck inspection requirements checklist to keep your commercial vehicle inspection in Maryland and elsewhere smooth and hassle-free.