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Re: trial CityRail signage and info systems

boofheadpaul@yahoo.com.au wrote:

>  Generally, announcements are made when the board
> changes, 5 mins before the train arrives (and 2 minutes depending of the SPI's
> location) and when the train arrives - sometimes more often.  So in other
> words the only time you will not hear a recorded announcement is when the SPI
> system is down.

SPIes installed in signal boxes (Blacktown, Granville, Sutherland, Sydenham) are
connected to the track circuits which trigger the announcements at when the train
gets to a certain point.  The down side of this is that if a train is cancelled,
and the SPI is not updated, the rest of the trains for the day are one train out.

--
David Johnson
CityRail Guard
trainman@ozemail.com.au
http://www.ozemail.com.au/~trainman/