<P> Six twisted fragments of the collapsed bridge can be found adorning the gardens in the engineering faculty of Monash University, Clayton campus . It is said by students that they are to remind engineers of the consequences of their errors . Monash University acquired these when asked to participate in the investigation of the collapse . </P> <P> Commemorations have been held on 15 October every year since the collapse . A West Gate Bridge Memorial Park to workers who lost their lives is located near the bridge . It opened on the 34th anniversary of the collapse, 15 October 2004 . It includes the existing West Gate Bridge Memorial and Sculpture, and the memorial for six who died in the Spotswood Yarra Sewer Tunnel collapse of 12 April 1895 (Good Friday). </P> <P> Construction resumed in 1972, with the bridge being completed in 1978 . After 10 years of construction, the bridge, a part of the larger West Gate Freeway, cost $202 million . </P> <P> Speed cameras were erected on the bridge in 2004, but were not activated until September 2005, because of issues with a similar camera on the Western Ring Road . However these speed cameras were switched off in 2005, and currently remain disabled, as the sway of the bridge prevents secondary verification of the alleged speed against a fixed point . In 2006 the State Government spent $1.3 million on erecting railway style boom barriers at each entrance to the bridge to block traffic in the event of a terrorist attack . In March 2007 the State Government announced that two flagpoles would be erected atop the main bridge pylons, to fly the Australian and Victorian flags, each being 10 metres by 5 metres in size and 135m above sea level . Costing $350,000 to install and $15,000 a year to maintain, the flags were unfurled on 24 September 2008 . </P>

When was the westgate bridge in melbourne built