Traffic using Australia's most famous bridge has been brought to a standstill following a crash. Police have urged motorists to avoid Sydney Harbour Bridge after two cars were involved in a crash about 2.15pm on Tuesday. Lengthy delays have erupted following a car crash on Sydney's Harbour Bridge. Lengthy delays have erupted following a car crash on Sydney's Harbour Bridge. Picture: SuppliedLengthy delays have erupted following a car crash on Sydney's Harbour Bridge.