A middle-aged woman who shut down a busy Melbourne freeway for two hours - causing peak-hour traffic chaos - was protesting against alleged corruption within Victoria Police.
The woman was tackled by police and arrested just before 9am on Tuesday after staging a two-hour protest on the Glen Iris footbridge above the Monash Freeway.
Authorities closed the freeway to all traffic worried the protester might try to start a fire on the footbridge or jump onto the road below.
The woman was equipped with petrol, a truck's wing mirror and a banner which stated "VicPol corruption".
"We don't know what she was protesting about but it was related to Victoria Police," Inspector David Blencoe told reporters at the scene, adding the woman "had some prior contact with police".
The protester also had some refreshments with her suggesting she was planning to stay on the footbridge for some time.
Insp Blencoe said authorities didn't shut down the freeway between Warrigal and Toorak roads lightly "but we felt we had to close it".
Experts negotiated with the woman for two hours before they tackled her to the ground before 9am.
She was arrested and taken to the Alfred Hospital for assessment.
"It was an excellent outcome," Insp Blencoe said afterwards.
"There were no injuries to the woman or police and any risk to public safety was mitigated."
The freeway was subsequently reopened but only after thousands of commuters were forced to find an alternative route to work.
Many vented their frustration on Twitter.
"Late to work because the monash freeway was completely closed ... again," @sgx_North said.
A truck fire late last week caused peak-hour snarls when emergency services were forced to close all three in-bound lanes.