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 April 1974 - Wallgrove Road to Great Western Highway The freeway was extended to the Great Western Highway. As part of this project, the temporary Wallgrove Road terminus was reconstructed into a proper half-diamond. Thanks to OZROADS for the information.