One statistic should stop every tunnel operator in their tracks: in a controlled evacuation trial at the Eastern Distributor tunnel, 68% of participants rated the clarity of PA announcements as poor or very poor — yet PA systems remain the primary emergency communication channel in every road tunnel in Australia.
Meanwhile, video-based tolling — designed to collect revenue — generates a real-time register of every vehicle in a tunnel, linked to account holder contact details. This by-product of the commercial function enables targeted emergency flash messages, two-way communication workflows, and actionable intelligence for emergency services.
Trial data confirms SMS messaging was rated effective by 81% of recipients, and crowd behaviour research demonstrates that reaching just 8–16% of a population with quality information creates "informed leaders" who guide the remaining majority to safety. The Western Harbour Tunnel — Australia's first video-only toll road, opening 2028 — will demonstrate this convergence at scale.
This white paper presents the evidence for why specifying tolling and safety as separate tunnel systems is no longer defensible, and provides a phased implementation roadmap for both new-build and existing tunnel assets.
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