Protective bollards and barriers will be installed at Flinders Street Station as the Victorian government boosts security in the CBD.
The barriers will be installed around an expanded forecourt at the major transport hub, widening the pedestrian crossing by more than three metres, the state government announced on Monday.
As part of its $50 million commitment to security in the city, the government says "nine sites will be upgraded from concrete blocks to permanent protections, in line with advice from security experts".
"The Flinders Street upgrades will improve safety for thousands of pedestrians and visitors to our city who cross this intersection at peak times - it will also improve pedestrian flow outside the station," Police Minister Lisa Neville said.
The permanent measures will begin being rolled out by December across the Flinders Street Station forecourt, Princes Bridge and Bourke Street Mall.
Six other sites will be upgraded to permanent protections by the end of 2019, including Federation Square, Southbank, Southern Cross Station, State Library, Queen Victoria Market and Olympic Boulevard.
The security upgrades will also include a new public-address system and major CCTV expansion.
"While there is no way to completely eliminate risk, we are doing everything we can to keep pedestrians safe," Ms Neville said.