Sydney Trains have also posted a video on their facebook (Aug 9) about the changes which will need to be made to bring the Blue Mountains line west of Springwood in line with rest of the system.
I guess this was inevitable really...once the V-sets would be retired this was going to have to happen unless new trains were built to the narrower specs similar to the V-sets. I think the general thought process is that this particular bottleneck should not impact/limit the train design either now or into the future, especially when the other 2 intercity lines (south coast and central coast/newcastle) have no issue with the wider trains, which do bring advantages such as wider/larger vestibules to reduce narrow choke points, larger toilet blocks, etc and are much more friendly for the disabled.
I guess another question is whether services in the region will be bolstered through "local runs" using suburban stock such as Waratahs? Something like a Penrith-Katoomba or Springwood-Lithgow type run?
Furthermore, will all Oscars be "suburbanised" as the Tangara G sets were or will some be kept with their toilets intact to help "make up the numbers" and bolster services with the new intercity trains?
Will be interesting to see what comes of all this.