Three climate activists have been arrested after a peak-hour blockade on a busy Brisbane motorway.
Traffic stretched back for kilometres on the Port of Brisbane motorway on Wednesday, with one Blockade Australia protester chained between two vehicles cut free by police.
Five people have been arrested in Brisbane since the group's national climate action began three days ago.
Blockade Australia's Bridget Slattery said the protest was against "inaction on the climate crisis".
She was unable to say whether action would enter a fourth day.
"What I do know is these people [protesters] are really committed to fighting for a liveable future ... they're full of hope and not giving up," she said.
Queensland Trucking Association's Gary Mahon said the blockades had begun to frustrate drivers.
He urged drivers to "just be patient and let the law take its course".
He said no ships have been affected so far but said truck drivers earnings are on the line.
On Tuesday, a 59-year-old was charged with multiple offences, including unregulated high-risk activities and committing public nuisance, after a protest on the same motorway caused major delays.
A 23-year-old woman was charged on Monday after a peak-hour protest at the port.
Blockade Australia's climate protests have also targeted ports in Melbourne and Newcastle.