May 1992 - Prospect to Mays Hill
Widening and the final link between Prospect to Mays Hill were opened to traffic. This also marked the change from freeway to motorway. Initially a $1.50 toll was charged for cars, ensuring that after the 20-year contract period, the motorway would be toll free (the tolls were removed in February 2010).
Thanks to OZROADS for the information.