Sydney Harbour Bridge has a suicide prevention barrier. In February 2009, following the murder of a four-year-old girl who was thrown off the bridge by her father, the first stage of a temporary suicide barrier was erected on Westgate Bridge, constructed of concrete crash barriers topped with a welded mesh fence. The permanent barrier has now been completed throughout the span of the bridge. The barriers are costed at $20 million and have been reported to have reduced suicide rates on the Westgate by 85%.