The most expensive roadside violations often begin as small defects that were visible before dispatch: a light that did not work, a damaged tire, a missing mudflap, an empty washer reservoir, an unsecured fire extinguisher, or a coupling component that was not checked closely enough.
MMT’s Roadside Inspection Readiness worksheet was built around a straightforward idea: inspect the entire combination in the same order before every trip. Do not glance at the tractor and assume the rest is fine. Walk it, touch the items that require a hands-on check, open the hood, verify the coupling, inspect every trailer and dolly, and correct defects before moving.
Use the same order every time
A repeatable pattern reduces the chance of skipping an area when the yard is busy, the weather is bad, or the equipment assignment changes. The FMCSA Model Commercial Driver License Manual recommends inspecting a vehicle the same way each time so the steps become familiar.
The MMT worksheet groups the inspection into practical zones:
- Approach and general condition
- Tractor front and driver side
- Engine compartment and cab
- Tractor rear and coupling
- Trailer or trailers and converter dolly
- Lights, reflectors, mudflaps, and visibility
- Documents, ELD entries, and emergency equipment
That route is a memory aid, not a race. The inspection takes as long as needed to determine that the equipment is safe.
Start before touching the truck
The inspection begins while walking toward the unit. Look at the ground, the vehicle’s posture, and the space around it before attention narrows to individual components.
- Leaks and puddles: fresh oil, coolant, fuel, or other fluid under the vehicle needs investigation.
- Lean or sag: a tractor or trailer sitting unevenly can point to a tire, suspension, loading, or landing-gear problem.
- Visible damage: look for new body, mirror, light, door, roof, and trailer damage.
- Movement hazards: identify people, equipment, low obstructions, wheel chocks, and anything else in the path.
A quick glance from the cab cannot replace the approach. Some of the easiest defects to catch are visible only before the vehicle moves.
Tires, wheels, and mudflaps
Inspect every tire on the tractor, each trailer, and the converter dolly. A low tire can still look round, and a tire in a dual assembly can hide damage from the outside view. Check with the appropriate gauge and use the required inflation standard for the tire and equipment.
- Look for cuts, bulges, exposed material, objects, uneven wear, and sidewall damage.
- Verify inflation and tread depth against the applicable requirements and company standard.
- Look between duals for contact, trapped debris, and hidden damage.
- Inspect rims for cracks, damage, or unauthorized repairs.
- Look for loose or missing lug nuts and signs of movement around the fasteners.
- Check hubs and seals for leaks.
- Confirm mudflaps are present, secure, properly positioned, and not dragging.
Do not rely on a single hard-coded tire pressure printed on a general worksheet. Correct inflation depends on the tire, axle, load, and fleet specification.
Lights, reflectors, and visibility
A full light check means the entire combination, not only the headlights. Verify required headlights, high beams, turn signals, four-way flashers, brake lights, tail lights, marker and clearance lights, and license-plate lighting. On doubles, include both trailers and the dolly.
Clean lenses and reflective material so they can do their job. Confirm required conspicuity tape is present and visible. Inspect the windshield for damage or obstruction, test the wipers and washer system, and make sure mirrors are clean, secure, and correctly adjusted.
The dashboard and windshield area matter too. Mount navigation and communication equipment securely and keep the driver’s field of view clear. Loose items can become projectiles or interfere with controls during a hard stop.
Open the hood
Under-hood defects are missed when the hood stays closed. Follow the manufacturer’s procedure and inspect the engine compartment with the vehicle safely secured.
- Check engine oil, coolant, power-steering fluid, and washer fluid using the correct procedure for the equipment.
- Inspect hoses for leaks, wear, abrasion, swelling, and secure connections.
- Check belts for condition, tension, cracks, and fraying where applicable.
- Look for fresh fluid, damaged wiring, loose components, and anything rubbing where it should not.
- Confirm visible steering and suspension components are secure and free from obvious damage.
Fluid checks must follow the vehicle manual. Opening a hot cooling system can cause serious injury, and some oil-level procedures require a specific shutdown period.
Cab, controls, and brakes
The worksheet emphasizes a clean dash, seat belts, logs, and documents. The complete pre-trip also includes the controls and brake checks taught for the vehicle.
- Confirm the seat and seat belt are secure and working for each occupant.
- Check mirrors, windshield, wipers, washer, defroster, heater, and horn.
- Verify gauges and warning indicators respond normally during a safe start.
- Test parking, service, and trailer brakes using the procedure for the equipment.
- Complete the required air-brake checks, including warning and protection devices, when operating air-brake equipment.
- Make sure the steering has no abnormal looseness and the controls are unobstructed.
Brake checks are not an item to improvise from an online article. Use current CDL training, company procedure, and the manufacturer’s instructions for the assigned equipment.
Tractor rear and coupling
The connection between units deserves a deliberate inspection. Do not accept “it was already hooked” as proof that it is secure.
- Visually confirm the fifth-wheel locking jaws are closed around the kingpin and the release handle is seated.
- Check the mounting, platform, apron, kingpin, and sliding fifth-wheel components for condition and securement.
- Inspect airlines, gladhands, seals, and the electrical line for damage, secure connections, and enough clearance for turns.
- Confirm the trailer is sitting correctly on the fifth wheel with no improper gap.
- Check landing gear position, supports, crank handle, and clearance.
- For doubles, inspect the pintle hook, drawbar eye, safety chains, air and electrical connections, and converter dolly.
Perform the required tug test and brake checks in a safe area using the approved procedure. A visual check and a functional check serve different purposes.
Every trailer and dolly
Walk each side and the rear of every trailer. For doubles, inspect both pup trailers and the converter dolly as separate pieces of equipment.
- Inspect tires, wheels, hubs, suspension, brakes, and visible air components.
- Check side, rear, brake, turn, clearance, and license-plate lights.
- Verify reflective tape, mudflaps, doors, hinges, latches, and required seals.
- Check the frame, body, landing gear, and rear-impact protection for obvious damage.
- Confirm registration and required trailer documents are present where company procedure specifies.
- Make sure cargo and equipment are properly distributed and secured when applicable.
Then step back and look at the complete combination again. A close inspection finds component defects. A final wide view can reveal lean, clearance, alignment, or connection problems that are harder to notice up close.
Logs, paperwork, and safety equipment
A mechanically sound vehicle can still be delayed by incomplete records or missing emergency equipment. Before dispatch:
- Confirm the correct tractor, trailer numbers, shipping information, and co-driver are entered according to company procedure.
- Review hours-of-service status and resolve ELD errors before driving.
- Make sure the registration, annual inspection documentation, permits, and required operating information are accessible.
- Confirm the ELD instruction materials and any required backup records are available.
- Verify the fire extinguisher is properly charged, secured, and accessible.
- Verify the required warning devices are present and serviceable.
- Know where the truck book and required driver credentials are located.
Requirements vary with the operation, cargo, jurisdiction, and equipment. The company document list should be maintained separately so it can be updated without weakening the physical inspection.
When something is wrong
A pre-trip only works if finding a defect changes the decision. Do not dispatch unsafe equipment and hope the next stop will be more convenient. Secure the vehicle, report the problem through the company’s current process, and route it to the proper repair location.
Review the previous vehicle inspection report when required. If it lists a safety-related defect, confirm the repair has been completed or properly certified before operating. Document new defects accurately and never sign for a condition that was not actually verified.
The items most often missed
- The puddle under the unit during the approach
- A low tire that still appears round
- The inside tire and space between duals
- Marker, clearance, and license-plate lights
- Reflective tape hidden by dirt or damage
- The engine compartment because the hood was never opened
- The fifth-wheel lock, pintle hook, safety chains, gladhands, and electrical line
- The second trailer or converter dolly
- An unsecured fire extinguisher or incomplete warning-device set
- Incorrect trailer, co-driver, or shipping entries in the ELD workflow
The fix is not a longer memory test. It is a consistent physical route around the equipment, completed the same way every time.
Pre-trip quick reference
- Approach: leaks, lean, damage, and hazards around the unit.
- Tractor: tires, wheels, lights, reflectors, mudflaps, windshield, mirrors, and body.
- Under hood: fluids, leaks, hoses, belts, wiring, steering, and visible suspension.
- Cab: seat belt, gauges, warning lights, visibility, horn, controls, steering, and brake tests.
- Coupling: fifth wheel, kingpin, airlines, electrical line, landing gear, pintle hook, chains, and tug test.
- Trailers and dolly: repeat the tire, wheel, brake, suspension, light, reflector, body, door, and connection checks for every unit.
- Documents and safety gear: ELD entries, hours, registration, inspections, permits, fire extinguisher, and warning devices.
- Decision: report defects and correct unsafe conditions before dispatch.
Sources and operating guidance
- MMT Trans Corp: Roadside Inspection Readiness worksheet, August 2026
- FMCSA Safety Planner: Equipment, inspection, and use
- FMCSA Safety Planner: Pre-trip inspection and DVIR requirements
- FMCSA: Model Commercial Driver License Manual
- FMCSA: State CDL manuals
This article is general safety information and an explanation of the MMT worksheet. It is not a substitute for a complete pre-trip inspection, current company policy, the driver’s state CDL manual, applicable law, manufacturer instructions, or training on the assigned equipment.