In 1972 between Bunbury and Perth the train encountered a section of track ahead in a zigzag but both rails remained parallel.

After staying there for ages, the train crept through the zigzag without incident.

http://www.theage.com.au/national/victoria/is-it-real-photo-of-railway-track-bent-by-the-heat-looks-fake-but-isn-t-20180214-p4z0c2.html

Regards,