Serial Extinction Rebellion protester Eric Serge Herbert will front court on Friday after locking himself to a car outside Queensland government headquarters for five hours.

He and fellow activist Todd Dent locked themselves to the vehicle about 6.15am on Thursday off the Riverside Expressway on Margaret Street.

Brisbane protester Eric Herbert before he was cut from a car to which he had locked himself.

They were cut from the car about 11.30am and taken into custody with their arms still locked inside metal pipes.

Herbert, 20, whose bail conditions prevented him from entering the CBD, told Brisbane Times he was willing to spend time in jail.