The real root cause: why time pressure drives warehouse vehicle incidents

WorkSafe New Zealand treats fatigue as a form of impairment, in the same category as drugs and alcohol, and under HSWA a PCBU has a duty to manage that risk so far as is reasonably practicable. That's a meaningfully firmer legal position than "tiredness happens." Four main factors are identified as driving it — extended shifts, long commutes, time away from home, and excessive work demands — and peak season has a habit of stacking more than one of them onto the same roster at once.

A more effective approach isn't asking people to be more careful under worse conditions. It's reducing the dependency on their alertness in the first place. Detection that works the same way for a ten-year employee and a contractor on their first shift, at 8am or 11pm, moving quickly or slowly, doesn't get weaker exactly when peak season makes everything else weaker. That's a strong case for an engineering-level control sitting above the administrative one: it's a layer that doesn't have a bad day just because the roster did.

But detection and a warning only solve half of what this article has been describing. An alert still depends on someone perceiving it, deciding how to respond, and then acting — the same three-stage process that fatigue, unfamiliarity and time pressure degrade most. A tired operator or a distracted new starter is precisely the person least equipped to react to a warning correctly, at precisely the moment peak season has made that scenario more likely. Detection alone doesn't remove the risk that pressure created. It simply moves the same dependency on human alertness one step later in the sequence.

Slowing the vehicle automatically is an important feature that helps close that gap. Rather than relying on a tired or unfamiliar person to notice an alert and respond correctly in time, the vehicle itself can respond the instant a hazard is detected, where technically available — independent of who's driving it, how long they've been on shift, or how new they are to the site. This reflects the same standard WorkSafe Victoria's own Forklift Safety Guidebook now points to, recommending proximity detection systems capable of automatically slowing mobile plant as part of a defensible response to pedestrian risk. It's a useful signal from another jurisdiction's regulator, entirely independently of New Zealand's own research, that the same underlying pressure this article has described is worth an engineering-level answer, not just a better warning.

That distinction matters more during peak season than at other times of year, largely because it's the period when the human side of the equation is least reliable. Slow the Vehicle is offered as a standard configuration across SonaSafe's Tagged and Hybrid deployments, not a specialist add-on reserved for the highest-risk sites — which means an especially useful layer, right when a workforce is under the most pressure, is available as standard, not something a business has to remember to ask for.