Buses will replace trains between Lidcombe and Bankstown and Lidcombe and Olympic Park,while no services will operate on the T5 line,where commuters are urged to instead use the T1 line.
But the availability of replacement bus services will be unpredictable,as bus workers also plan to take strike action on Wednesday.
Transport Workers’ Union bus drivers will pause services – including school services – across the CBD,the inner west and the city’s south-west from 4am to 7am and again from 2.30pm to 5.30pm due to safety concerns.
Longland warned commuters would experience “very large gaps” of about 30 minutes across all lines of the network and encouraged people to work from home.
“We’ve got about three-quarters of our trains that won’t be in service today. We’ve really spread the available trains very thinly across the rest of the network,” he said on 2GB radio on Wednesday morning.
“We’re asking anyone that can avoid travel to please avoid travel on the rail network today.”