That won't happen, all Geelong trains will travel via Wyndham Vale.
Warrnambool trains would skip probably all stations between North Geelong and Sunshine, so they won't Interfere the timetable with their 115Km/h speed limit.
A Vlocity may have a speed limit of 160 km/h but when they start to stop at Intermediate stations, their average speed plummets !
The Werribee line will be choc a block with sparks !
@Duncs does make a valid point. Warnnambool services could continue via Werribee to provide a service between Geelong and Werribee for changing to sparks?