Concrete barricades have been installed to block vehicle access to Sydney's Martin Place following attacks in England and France in which terrorists deliberately drove into crowds of people.
The barricades in Martin Place, between Phillip and Elizabeth Streets, are part of an ongoing review of security in public spaces, the City of Sydney said in a statement.
"The City of Sydney takes advice from NSW Police and state emergency services on issues of public safety, including the installation of bollards and barricades to block vehicle access in response to security concerns," a spokeswoman said.