Brisbane Airport line design

["John Browning" <ceo8@rocknet.net.au>]

Picked up on another list:

>
> Dear Members,
>
> I was wondering if anybody could offer some help with a design problem we
> are currently undertaking.
>
> Our new airport line consists of 8.5 km of single elevated viaduct track
> with passing loops. The track will have an internal guard rail along the
> whole length for derailment protection.
>
> QR (Queensland Rail) is building 6 turnouts on top of the viaduct. The
> viaduct has small side walls which do not give any protection for derailed
> vehicles.
>
> We are currently designing the turnouts with external and internal guard
> rails and also internal ramps to hopefully guide a derailed vehicle
through
> the turnout and keep it upright.
>
> Do you know of any place in the world that uses such a design?
>
> Also, do you know of any other way of
> guiding derailed vehicles through turnouts on viaducts without side walls?
>
> I certainly would appreciate any comments you might have.
>
> Thanks
>
> Greg Beh
> Principal Drafting Coordinator
> Track Engineering, QR
> email: gregory.beh@qr.com.au
>

--
John Browning
Rockhampton, Queensland, Australia
ceo8@rocknet.net.au