01-08-2014, 12:02 PM
Part a: I'm not sure you've answered the question - you've certianly not said anything about how the positioning of train detection may need to move.
I wouldn't be able to give a complete list but here are some things I've come across:
Axle Counters can take longer to register a state change than some TRack circuits, therefore Strike-in points for level crossing need to be reassessed; controls for AWS suppression may need to change; any track sequences (signal stick, TORR) need to be evaluated also. Solutions are to change the controls (add an extra track section for example) or to move the Axle counter.
There are limits on how close to the old IBJ, Axle counters can be positioned.(e.g. Axle counter is closer to signal, delayed replacement may be required)
I'll try and look at part B later
I wouldn't be able to give a complete list but here are some things I've come across:
Axle Counters can take longer to register a state change than some TRack circuits, therefore Strike-in points for level crossing need to be reassessed; controls for AWS suppression may need to change; any track sequences (signal stick, TORR) need to be evaluated also. Solutions are to change the controls (add an extra track section for example) or to move the Axle counter.
There are limits on how close to the old IBJ, Axle counters can be positioned.(e.g. Axle counter is closer to signal, delayed replacement may be required)
I'll try and look at part B later