The M4 tunnel in Sydney has been shut down, triggering widespread traffic chaos and significant delays for commuters across the city.
Major Disruption for Morning Commuters
The closure was confirmed early on Wednesday, 4th December 2025, with authorities announcing the shutdown at approximately 02:43. The incident has caused a ripple effect of congestion on major arterial roads as drivers seek alternative routes.
The exact cause of the closure has not been immediately disclosed by transport officials. Motorists are being urged to avoid the area if possible and to allow for considerable extra travel time for their journeys.
Advice for Drivers and Alternative Routes
With one of the city's key traffic arteries blocked, traffic management systems are under strain. Drivers are being advised to plan ahead, check live traffic updates, and consider using public transport where feasible to mitigate the disruption.
The closure is expected to affect peak hour travel throughout the day, with no official timeframe given for when the tunnel might reopen. Emergency services and traffic crews are understood to be on the scene managing the situation.
Ongoing Updates and City Impact
The sudden closure has left many Sydneysiders facing lengthy and frustrating delays. The impact is being felt across the wider transport network, highlighting the tunnel's critical role in the city's infrastructure.
Authorities are expected to provide further updates as the situation develops and more information about the reason for the emergency closure becomes available. Commuters are advised to stay tuned to official channels for the latest travel advice.
