Vehicle and Driver Standards
Standards are about fitness
Vehicle and driver standards ask whether the vehicle is fit to be on the road and whether the driver is fit to control it. For heavy vehicles the stakes are higher because mass and braking distance magnify every defect.
Vehicle standards
A candidate must understand the main compliance areas: brakes and air systems, tyres and tread, lights and reflectors, couplings and load restraint, steering and suspension, and exhaust and noise. Heavy vehicles also carry specific requirements around warning devices, conspicuity markings, and the condition of trailers and dollys. The standard is not merely that a component exists but that it performs its function - a brake that works but is out of adjustment, or a tyre with legal tread but a sidewall defect, can still breach the standard.
Driver standards
Driver standards cover fitness to drive: medical conditions, vision, fatigue, alcohol and drugs, and the duty to declare a condition that affects control. Heavy vehicle drivers face particular scrutiny on fatigue because long hours and shift work are normal. A candidate should understand that fitness is a continuing obligation, not a one-off test at licensing.
The traps
Questions often present a defect that is legal on a light vehicle but not on a heavy vehicle, or a defect that seems minor but affects a safety system. Another trap is treating a pre-trip inspection as a formality: the driver is responsible for identifying and reporting defects before moving. A defect that develops en route must be reported and the vehicle not driven further if it is unsafe.
Rule of thumb
If a defect affects steering, braking, tyres, coupling, or lights, treat the vehicle as unroadworthy until it is assessed - do not drive it to the depot on the basis that it is only a short trip.
Worked example
A driver finds a cracked tyre sidewall during a pre-start check. Tread depth is legal, but the sidewall defect makes the tyre unroadworthy. The driver reports it and the vehicle does not move until the tyre is replaced.