Detention time has long been treated as an operational inconvenience or a commercial dispute between carriers and customers. That view is changing. Across supply-chain policy discussions, there is growing recognition that unplanned waiting time at sites can flow directly into unsafe transport decisions, making detention a genuine Chain of Responsibility issue rather than just a productivity complaint.
The reason is simple. Time lost in queues, delayed loading, incomplete paperwork, unavailable dock space or slow release processes does not disappear. It is pushed downstream into the rest of the journey. That pressure can affect break planning, shift handovers, route choices, driver start and finish times, and the margin available for weather, traffic or mechanical interruptions. In practical terms, site delay can become speed pressure, fatigue pressure or pressure to continue with a marginal vehicle or load arrangement.
This is exactly the kind of upstream influence the HVNL is designed to capture. Parties beyond the driver can create conditions that encourage non-compliance. If a business knows that its site practices routinely cause extended detention but does nothing to manage the transport safety consequences, it should not assume the risk sits only with the carrier. Schedulers, consignors, consignees, loaders and site operators all need to consider how delay affects the safety of the transport task.
The policy significance is important for operators. As national freight bodies continue to focus on efficiency, resilience and supply-chain transparency, detention is increasingly being discussed in terms of measurable system harm. That means operators should expect more scrutiny of whether they merely absorb delay or actively control its safety effects.
A mature response goes beyond complaining about customer wait times. Carriers should identify detention hotspots, measure average and worst-case delay, and connect that data to fatigue planning, missed slots, route compression and after-hours arrival risk. Contracts and service agreements should be reviewed to see whether unrealistic turnaround assumptions are embedded in the operating model. Internally, dispatch teams need clear authority to re-sequence work or stop a task when accumulated delay erodes the safe operating window.
Customers and site operators also need practical controls. These may include realistic booking intervals, overflow procedures, communication protocols for delays, loading readiness checks before vehicle arrival, and safe parking arrangements where waiting is unavoidable. Importantly, detention should trigger a fresh safety decision, not simply an expectation that the lost time will be recovered later on the road.
The broader lesson is that CoR compliance cannot be separated from how time is created, consumed and transferred across the supply chain. If detention at one site routinely destabilises the rest of the day, the issue is not administrative. It is a transport safety control failure.
If your business needs stronger capability in recognising how commercial and site decisions create HVNL risk, COR Safety Management Systems offers practical CoR training programs for leaders, schedulers and operational teams.