wrote in message
...
When crossrail goes south of the river at woolwich and on from there is
it going to switch to 3rd rail or are they going to put overhead on the
line to Abbey Wood? Or is it all going to be new track anyway after
woolwich?

Crossrail will have its own tracks to Abbey Wood, which will be 25kV OHLE.
The track diagram in the July MR suggests that there might be some lengths
of dual voltage track, but in normal running Crossrail and Southeastern
trains will keep out of each others' way, and off each others' tracks.
Things would be different if the option to extend Crossrail to Gravesend is
ever taken up.

Peter