Train delays in Sydney are expected to be frequent and 'irrecoverable' under the new timetable, with the increase in services meaning it is more difficult to bounce back from incidents.
The extra strain on the rail network is a result of the addition of extra services, with the expected result of 'no opportunity for diversions or recovery from incidents', according to a report by smh.com.au.
Some of the issues with the new system have already been highlighted, including a halving of the services to Westmead train station.
The weekend saw the first test of the system's ability to cope with delays, with urgent equipment repairs at Ashfield.
There were big delays, with cancellations of train services across the network.
According to a Sydney Trains spokesperson, there is an on-time running figure of more than 97 per cent under the new timetable, and this has been the biggest increase in services in NSW ever.
"This success is a result of extensive planning in the run-up to the launch of the timetable. While unforeseen incidents can sometimes cause delays, we are confident we have everything in place to help minimise any potential impact on our customers," he said.