Another day, another train issue in Sydney.
This time, a major technical glitch has caused mass delays across the network.
"Please delay non-essential travel, utilise local buses or make alternate travel arrangements if possible," a statement from NSW Transport said.
"We apologise for the disruption and appreciate your patience as we restore the network to on-time running."
Commuters left frustrated have vented on Twitter.
Customer are being urged to delay any non-essential travel and listen to announcements.