"Tom Anderson" wrote in message
h.li...
Morning all,

So, that line is two-track to Heathrow Central, where it singles down for
the bit to T4. This map i have also shows the extension to T5 as
single-track. Is that true? I have also read that the station box at T5 is
big enough for four tracks and four platforms; even with an eye to
building AirTrack in the future, that seems like overkill for a single
track line. Not to mention that AirTrack and a single-track stretch from
T5 to T123 won't mix well.


T5 has space for 6 tracks and 6 platforms, 2 for HEx, 2 for Picc, and 2 for
Airtrack but those for Airtrack will be partitioned off until required. I
believe the Piccadilly line to T5 will operate as separate arrival and
departure platforms, with a headshunt for trains, but HEx will operate to
either of its two platforms, with a crossover on the upside of the platforms

Paul