Overlap sharing

[Saraswathi]

Thanks for the detailed response Peter. This concept came into light when I read about this overlap sharing in the IRSE news magazine of January (article on NSW signalling principles) where it was mentioned that New South Wales (which is one of the Australian state here) do not use shared overlaps. I have then looked at other state's standards and interestingly found that Queensland state permit overlap sharing. But they have a condition which could probably mitigate the risk to certain extent. QR (Queensland Rail) standard states that: "Overlaps may be simultaneously shared provided that at least 50% of each overlap is available before any point of conflict (e.g. head on collision or clearance infringement). In addition there must be a minimum of 50 metres available for each approaching train before any point of conflict."

Regards,
Saraswathi Penneru