Oct 71 - Dec 72 - Apr 74 - Dec 82 - Sep 84 - Dec 85 - Apr 86 - Jun 86 - Jul 86 - Aug 86 - Aug 87 May 92 - Jun 92 - Nov 92 - Jun 93 - 1997 - Dec 99 - Dec 05 - Jan 17 - Feb 17 - Mar 17 - May 17 - Jun 17 - Jul 17 - Jul 19 December 2005 - Westlink M7 (Lighhorse Interchange) With the completion of the 40km Westlink M7, the Lighthorse Interchange (named so to honour the memory of those Australians who served in the Light Horse Infantry, which had a camp nearby during World War 2). This is a four-level stack interchange, allowing for seamless travel between both motorways. The original proposal called for a 'roundabout' interchange, and the removal of the Wallgrove Road ramps for the Western Motorway. Click here for an artist's impression of the original proposal. Thanks to OZROADS for the information.