On Mon, 19 Sep 2016 12:45:14 +0100, Jim Chisholm
wrote:

Just been in Munich (escaped before BeerFest). Central S-bahn lines have
platforms on both sides, one for entry and one for exit. Must
significantly reduce dwell times as unloading (alighting) and loading
(boarding) take place simultaneously.
Was this considered for Crossrail?

I don't think so, but the cars do have three doors, rather than the
more normal two.