Alternate Route Button: Difference between revisions
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== Purpose == | == Purpose == | ||
Is is likely that, between two signals, there is more than one route between them. | Is is likely that, between two signals, there is more than one route between them. When setting a route from a signal, the system attempts to find the ''''best'''' route possible. Typically, this means that the most direct path is chosen, when possible. The dispatcher has little control over which route is set - most of the time this is acceptable since the optimal route is used. | ||
In rare cases it is necessary to choose one of the alternate routes. Choosing a specific alternate route is achieved using the Alternate Route Button (UFGT) button. | |||
== Operation == | |||
UFGT works by finding a route that does not require the throwing of switches. It is the dispatcher's job to first throw the desired switches manually using the WGT button. Once the switches have been thrown, and are in their end positions, press UFGT. Then, press the start and end signal buttons together. No switches will be thrown! If the alternate route exists and can otherwise be set, the rest of the route setting proceeds normally. | |||
Obviously, this requires more work on the part of the dispatcher due to the manual throwing of switches. But, very indirect routes can chosen explicitly. | |||
Revoking and other operations occur normally also. | |||
Revision as of 15:39, 8 October 2010
Purpose
Is is likely that, between two signals, there is more than one route between them. When setting a route from a signal, the system attempts to find the 'best' route possible. Typically, this means that the most direct path is chosen, when possible. The dispatcher has little control over which route is set - most of the time this is acceptable since the optimal route is used.
In rare cases it is necessary to choose one of the alternate routes. Choosing a specific alternate route is achieved using the Alternate Route Button (UFGT) button.
Operation
UFGT works by finding a route that does not require the throwing of switches. It is the dispatcher's job to first throw the desired switches manually using the WGT button. Once the switches have been thrown, and are in their end positions, press UFGT. Then, press the start and end signal buttons together. No switches will be thrown! If the alternate route exists and can otherwise be set, the rest of the route setting proceeds normally.
Obviously, this requires more work on the part of the dispatcher due to the manual throwing of switches. But, very indirect routes can chosen explicitly.
Revoking and other operations occur normally also.