(12-01-2010, 07:57 PM)Saraswathi Wrote: Hi guys,
An interesting debate on "approach release"......
We approach release the signals to reduce the train speeds to a reasonable extent. But.....
"Do you think approach releasing the signals is fail safe?"
Regards,
Saraswathi
Yes this could be the basis of a mod3 written question. In order to give enough scope for a 30 min answer then I think that I might word it:
Describe 3 situations in which the clearance of a signal is deliberately delayed until there is a train on its approach.
For each situation-
a) explain the rationale for imposing the control,
b) comment on any safety implications,
c) describe how any risks are mitigated.
Let's see some attempted answers to this.
PJW