Thirteen Metro Trains drivers have been stood down after refusing to use a new section of track at South Yarra, claiming they lack proper training.

Drivers on Frankston, Cranbourne and Pakenham line trains who refused to use new tracks between South Yarra and Hawksburn on Monday were stood down by Metro pending an investigation.

Thirteen drivers have been stood down for refusing to drive on the new track. Credit:Simon Schluter

The Rail Tram and Bus Union has argued Metro's 10-minute instructional video for drivers on how to navigate a new section of track was inadequate and drivers felt that running the services was unsafe.

Metro took the case to the Fair Work Commission on Friday, where the commission's deputy president Val Gostencnik rejected the union's claims.