"Recliner" wrote in message
...
"Stuart Moore" wrote

Would the plan give a through route up to the Heathrow express
tunnels? That'd give extra options for joined up transport links.

No, I don't think so. The two sets of lines and platforms are separate,
and parallel to each other (the Airtrack tunnels are south of the HEx
tunnels). Even if there is a connection, it's not meant to be used by
service trains. In any case, the services will be more reliable if kept
separate.
The main disadvantage of Airtrack (either original or this) is that it only
gives through trains to T5, with a change there needed to access the Central
Area, and a further change to get to T4 (might as well get the bus from
Feltham). While there would be a slight reduction in reliability,
connectivity would be improved by linking Airtrack with HEx/HConn/Crossrail.

The other disadvantage of Airtrack-Lite is that journey times from
Waterloo/Clapham Junction would be very slow, and further changes would be
needed to get to the Reading line, or to Woking (for Main Line connections)
or Guildford.

Peter