<span class="" id="parent-fieldname-description"> Sydneyâs electronic ticketing system, the Opal card, was officially rolled out across the entire Sydney Trains network last Friday. </span> <p>The latest rollout across 70 extra stations means customers from Green Square to Macarthur, Erskineville to Liverpool and Lidcombe, Sydenham to Waterfall and Cronulla can now use Opal. </p><div>