Sydney’s traffic descended into chaos after Blockade Australia protesters closed southbound lanes in the Harbour Tunnel.
This caused major disruption during peak hour and resulted in traffic chaos with motorists diverted to the Harbour Bridge.
While the NSW Police was able to open the tunnel around 9.15am, motorists are being advised to avoid the area.
Blockade Australia said it was trying to raise awareness about climate change.
A 22-year-old woman was arrested after locking herself to the steering wheel of a car and parking it across the entrance to the tunnel. This is one of only two ways to cross the harbour.
Under NSW legislation, illegal protests organised by “anarchist protesters”) which disrupt any public roads, rail lines, tunnels, bridges and industrial estates can now be fined $22,000 or jailed for two years, or both.