Sydney's M6 motorway opening delayed to 2028 due to sinkhole repairs

The opening of Sydney's M6 motorway is now delayed until the end of 2028, three years later than previously planned. This delay is due to sinkholes that have affected tunneling work, requiring extensive ground stabilization. Motorists will face reduced lanes on West Botany Street for 18 months as repairs are made. The southern section will be limited to one lane in each direction starting mid-2024, leading to slower travel times. Tunneling work is set to resume by the end of next year, pending safety approvals. The project cost has already increased to $3.1 billion, and further costs are expected due to the additional work required.