HGV Vehicle Checks Before Driving: The Complete Walk-Around Guide
Every professional HGV driver is legally required to carry out a pre-drive vehicle inspection before taking a lorry onto a public road. This is not a box-ticking exercise — it is a legal obligation under the Road Traffic Act 1988 and the operator's licence conditions, and it is the single most effective way to prevent mechanical failures, roadside prohibitions, and fatal accidents. This guide covers every element of a thorough walk-around check, the legal framework behind it, and what to do when you find a defect.
The Legal Basis for Pre-Drive Checks
Under Section 40A of the Road Traffic Act 1988, it is an offence to use a vehicle on a road when its condition is such that it involves danger of injury to any person. Under the operator's licence conditions, operators are required to have a documented system for checking vehicles before use. The DVSA Guide to Maintaining Roadworthiness states that drivers should carry out a daily walk-around check and record the results. Failure to carry out checks — or failure to report defects found — can result in prosecution of the driver, prohibition of the vehicle, and investigation of the operator's licence.
The Traffic Commissioner expects operators to demonstrate that drivers are trained in walk-around checks and that a defect reporting system is in place. During a DVSA compliance investigation, the first thing an examiner will ask for is the defect report books. Missing or incomplete records are a serious indicator of poor maintenance culture and can lead to licence curtailment or revocation.
When to Carry Out the Check
The walk-around check must be carried out before the first journey of the day. If a driver takes over a vehicle mid-shift, they should carry out their own check before driving — they cannot rely on a previous driver's check. If the vehicle has been parked overnight in an unsecured location, a check should also be carried out before the return journey. The check should take between 15 and 30 minutes depending on the vehicle type and configuration.
The Walk-Around Check: A Systematic Approach
The most effective walk-around check follows a systematic route around the vehicle so that nothing is missed. The following sequence covers a standard rigid HGV; articulated vehicles require additional checks on the fifth wheel, trailer coupling, and trailer systems.
1. Cab Exterior and Windscreen
Start at the front of the vehicle. Check the windscreen for cracks, chips, or damage that could impair the driver's view. A crack in the driver's line of sight is an immediate prohibition offence. Check the wiper blades — they must be intact and capable of clearing the windscreen effectively. Check the front bumper and number plate for damage and legibility. Inspect the front lights: headlights (main and dipped), front fog lights, indicators, and side marker lights. All must be clean, intact, and functioning.
2. Engine Compartment
Open the bonnet and check the following fluid levels: engine oil (between minimum and maximum on the dipstick), coolant (in the expansion tank, not the radiator directly on a hot engine), windscreen washer fluid, and power steering fluid. Check the brake fluid reservoir if accessible. Look for signs of leaks — oil, coolant, or hydraulic fluid on the engine bay floor or on components. Check the battery terminals for corrosion and security. Inspect the fan belt and any visible drive belts for cracking or fraying.
3. Nearside Front (Left Front)
Move to the nearside front of the vehicle. Check the front tyre: tread depth (minimum 1 mm across the central three-quarters of the tread width and around the entire circumference, though the DVSA recommends a minimum of 2 mm in practice), tyre pressure (check against the vehicle's tyre placard), and condition (no cuts, bulges, or exposed cord). Check the wheel nuts — all must be present and show no signs of looseness (rust streaks or movement marks around the nut). Check the brake disc or drum for excessive wear, scoring, or cracking if visible through the wheel. Inspect the suspension components for visible damage or leaks from the air suspension bags if fitted.
4. Nearside (Left Side)
Walk along the nearside of the vehicle. Check all nearside tyres using the same criteria as above. Check the fuel tank cap is secure and the fuel level is adequate for the planned journey. Inspect the bodywork for damage that could create a hazard (sharp edges, loose panels). Check the nearside mirrors — both the main mirror and the wide-angle mirror — for damage, cleanliness, and correct adjustment. Check the nearside indicator repeater lights. If the vehicle has a tail lift, inspect it for visible damage and check that it is stowed and secured correctly for travel.
5. Rear of Vehicle
At the rear, check the rear lights: brake lights, rear fog light, reversing light, rear indicators, and rear marker lights. All must be clean and functioning. Check the rear number plate for legibility and illumination. Inspect the rear doors or curtains — they must be properly closed and secured. Check the rear underrun protection bar for damage and security. If the vehicle has a tail lift, check the platform, hydraulic hoses, and control panel for visible defects.
6. Offside (Right Side)
Walk along the offside of the vehicle, repeating the tyre, wheel nut, and bodywork checks. Pay particular attention to the offside rear tyres on a multi-axle vehicle — these are the most common location for tyre defects that go unnoticed. Check the exhaust system for damage, loose mountings, or excessive smoke when the engine is running. Check the offside mirrors for damage and adjustment.
7. Cab Interior
Return to the cab and carry out the interior checks. Check the horn — it must work. Test the windscreen washers and wipers. Check the instrument panel for warning lights — any warning light that illuminates on start-up and does not extinguish within a few seconds must be investigated before driving. Check the speedometer, tachograph, and fuel gauge are functioning. Check the seat belt — it must latch, retract, and release correctly. Check the steering for excessive play. Test the service brake and parking brake. Check that all mirrors are correctly adjusted from the driver's seat. Ensure the cab is free from loose items that could become projectiles in an emergency stop.
8. Load Security
Before driving, check that the load is correctly secured in accordance with the Department for Transport's Code of Practice: Safety of Loads on Vehicles. All restraints (straps, chains, nets, or dunnage) must be in good condition and correctly tensioned. The load must not exceed the vehicle's maximum authorised mass (MAM) or any individual axle weight. Check that the load does not obscure any lights or the number plate.
Defect Reporting
Any defect found during the walk-around check must be recorded on the vehicle's defect report form. The driver must sign the form and hand it to the operator or transport manager before driving. Minor defects (such as a cracked mudflap or a dirty number plate) can be noted and the vehicle driven, provided the defect does not affect roadworthiness. Major defects (such as a tyre below the legal minimum tread depth, a brake warning light, or a cracked windscreen in the driver's line of sight) must be repaired before the vehicle is used.
| Defect Category | Examples | Action Required |
|---|---|---|
| Immediate prohibition | Tyre below legal limit, brake failure, cracked windscreen in driver's line of sight | Do not drive — repair before use |
| Delayed prohibition | Worn wiper blades, minor bodywork damage, low fluid levels | Report and repair within agreed timeframe |
| Advisory | Minor cosmetic damage, dirty lights | Record and monitor |
Tachograph and Documentation Checks
Before driving, the driver must also check their documentation. Insert the driver card into the tachograph and verify that the correct mode is selected (driving). Check that the vehicle unit is functioning and that there are no fault codes displayed. Ensure you have the required documents in the cab: driving licence, CPC card, vehicle registration document (or operator's copy), operator's licence disc, insurance certificate, and any required permits (abnormal load, LLCS, etc.).
Common Defects Found During Walk-Around Checks
DVSA roadside inspection data consistently shows that the most common defects found on HGVs during roadside checks are tyre defects (tread depth, pressure, and condition), lighting defects (blown bulbs, dirty lenses), brake defects (worn pads, air leaks), and load security failures. Many of these defects would have been identified and corrected by a thorough walk-around check. The DVSA's annual roadworthiness statistics show that approximately one in eight HGVs stopped for a roadside check receives a prohibition notice — a statistic that underlines the importance of pre-drive checks.
Training and Competence
All HGV drivers must be trained in walk-around checks as part of their initial driver training and CPC qualification. Operators should provide refresher training at regular intervals and whenever a new vehicle type is introduced to the fleet. The DVSA's Guide to Maintaining Roadworthiness provides detailed guidance on what constitutes a roadworthy vehicle and is the definitive reference for operators and drivers. GS Driver Training includes comprehensive walk-around check training as part of all Class 1 and Class 2 HGV courses, ensuring that newly qualified drivers are fully competent from day one.
Summary
A thorough walk-around check is the foundation of safe HGV operation. It takes 15–30 minutes, is legally required, and is the most effective way to prevent roadside prohibitions, accidents, and operator licence investigations. The check covers the cab exterior, engine compartment, all tyres and wheels, lights, bodywork, load security, and cab interior. Any defect found must be recorded and reported. Drivers who carry out consistent, thorough checks protect themselves, their operators, and every other road user.
