For many operators, fatigue risk does not rise in a straight line with kilometres travelled. It often increases when freight patterns become less predictable. Seasonal surges, agricultural movements, retail peaks, project work and shifting customer demand can turn a stable operation into a mixed-task environment with more early starts, split duties, waiting time, route changes and irregular return legs. Under the HVNL, that is exactly the kind of change that should trigger a fresh look at fatigue controls.
The practical risk is that businesses keep using fatigue assumptions built for a different task. A schedule that was manageable during steady linehaul may become unsafe when it absorbs extra loading delays, urban deliveries, biosecurity hold points, temporary detours, or variable site access. Even if diary entries or work and rest records appear technically compliant, the broader primary duty question remains: was the transport activity being managed safely so far as reasonably practicable?
Mixed-task operations are especially vulnerable because risk can accumulate in small pieces. A driver might start earlier than usual for one customer, spend longer waiting at a site, switch from highway driving to metro congestion, then take on an unplanned backload. None of those events in isolation may seem extreme. Together, they can erode alertness, shorten recovery opportunities and pressure the next day’s roster.
Operators should be reviewing fatigue through a planning lens, not just a record-keeping lens. Re-check the assumptions behind standard trip times. Look at where waiting time is occurring and whether it is genuinely rest. Examine how often drivers are shifting between task types in the same week. Review whether relief arrangements, handover points and accommodation plans still fit the freight profile. If subcontractors are used to absorb peak demand, confirm that your visibility of their fatigue controls is good enough.
There is also a training issue here. Dispatchers, allocators and customer-facing staff need to recognise that seasonal variation changes fatigue exposure even where distances are familiar. If planning staff are rewarded purely for service recovery or equipment utilisation, fatigue drift can be missed until a roadside breach, near miss or serious incident forces attention.
A sound response includes updated risk assessments, trigger points for plan changes, stronger exception reporting and supervisor review of roster patterns during peak periods. Operators that do this well are not waiting for fatigue problems to appear in breach data; they are looking for the conditions that create those problems.
Seasonal demand will always test transport systems. The question is whether your business treats changing task design as a safety signal or just a commercial challenge. If your team needs practical support to identify fatigue risk earlier and make safer planning decisions, COR Safety Management Systems offers CoR training programs built for real-world transport operations.