 It is the only one of Sydney's 'Metroad' routes that has not changed alignment since the Metroad system was adopted in 1993, although there were changes to the route prior to that.In August 2013, as part of the alphanumeric route scheme, Metroad 3 was decommissioned and was designated A3.After 1964, upgrading projects were commenced, with the construction of new De Burghs Bridges over the Lane Cove River between Pymble and Ryde (1967), and the duplication of Ryde Bridge over the Parramatta River between Ryde and Rhodes (1988).