There is just the single track.
During peak season there are two trains and they pass at sidings at Marla or Alice Springs depending on scheduling and progress.
And back on the PCE the local postie has delivered even more international goodwill;
@Czarcasm with a selection of the scenery of Oregon, all of which was new to me;
@Rebo with a field packed with bluebonnets … I was under the misconception the state flower of Texas was the yellow rose and
@kenobi_65 showing Soldiers Field and the Field Museum.
Wonderful. Thank you all.