Climate change activists are planning to disrupt Brisbane's peak-hour commute again next week with more demonstrations set for Monday.

This morning's rally, in which they stopped traffic for 10 minutes at a time, created congestion and disruption.

It was the second protest held by Extinction Rebellion, however two other traffic-stopping rallies have been held by other environmentalists in the past month.

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"Respectful civil disobedience has been shown to be the most effective form of demanding change," spokesperson Sergeio said.

"We cause disruption to society in order to allow our population to consider the climate emergency and what they will do about it."

The tactic of the group was to block roads and traffic for 10 minutes at a time, then move off the road for three minutes to let the traffic through.

"Then repeat for the duration of the morning traffic," Sergeio said.

He said from Monday to Friday next week, Extinction Rebellion would carry out similar protests, blocking morning peak-hour traffic in the heart of Brisbane.

Although there were only a couple of dozen protesters today, the small group took targeted action.

The first 10-minute roadblock cut-off Elizabeth Street at George Street, the second protest stopped traffic on the corner of George St and Adelaide Street.

Traffic was backed up to the Riverside Expressway.

Drivers were beeping their horns and passers-by yelled abuse.

In a bid to ease the tension activists handed out vegan biscuits to motorists.

The activists tried to win over the commuters with biscuits. ( ABC News: Dan Smith )

There was mixed reaction from commuters, many of whom were held up on their way to work.

Darren Pedley said demonstrators offered him a vegan biscuit while he waited.

"They're sending a good message to the world ... but they could have had a peaceful protest in the square," he said.

"If they think they're achieving something by holding people up, good luck to them, but at the end of the day people are just going be late for work."

Translink said buses travelling in both directions through the Brisbane CBD experienced delays of up to 10 minutes due to the protest action.

A number of buses in both directions were also diverted between Mater Hill station and Elizabeth Street due to the action.

Extinction Rebellion's first protest on June 27 saw environmentalists lock themselves to a canoe on one of Brisbane's major bridges in the morning peak hour.

Two of the protesters are due to appear in court today over the action.