06-05-2010, 04:05 PM
Ok, so I'm not sitting the exam this year and I did actually pass it some time ago, but I need some information; standards etc. seem,,, well, short on detail.
My new project deals with phantom overlaps, and while I am familiar with the term I cannot remember the detail. My research so far has provided the following definition:
"A Signal Overlap that can be proved clear by the Signalling System, but which does not have a defined limit at the required distance from the signal."
Does anybody know why you would use a phantom overlap, what benefit it gives, and how it is achieved? Even better can you point to a GB Rail standard which contains any detail?
My new project deals with phantom overlaps, and while I am familiar with the term I cannot remember the detail. My research so far has provided the following definition:
"A Signal Overlap that can be proved clear by the Signalling System, but which does not have a defined limit at the required distance from the signal."
Does anybody know why you would use a phantom overlap, what benefit it gives, and how it is achieved? Even better can you point to a GB Rail standard which contains any detail?