On Apr 10, 8:52*pm, D7666 wrote:

Of course, all this may result in 6car trains as well ... where a
10car splits into 4 + 6.

And even that assumes 455 and 456 will still be 4car and 2car units.

As they appear to be throwing 458s and 460s up in the air and forming
5car units out of where they land, and some left over, they may have a
similar idea about making 5car 455/456 out of 455s and 456s.

--
Nick