Re: Australian signalling (was Crossing loop design)

[petan@ion.com.au (petan@ion.com.au)]

Hi Matt, 

your explanation of Dynamic Speed Indicators was much better than the
explanations I read previously in a mag. Thanks!  

Cheers
Peter Cokley


>Outside of the suburban area, Dynamic Speed Indicators (DSI's) are
>progressively being introduced. These are a dot matrix display similar to
>the types used for route indicators and are mounted on Approach signals in
>CTC territory. They indicate the speed a train must be doing by the time it
>passes the home arrival signal. The only speeds displayed are 25, 40, 50 or
>80km/h. DSI's are mounted below the signal head whereas dot matrix route
>indicators are mounted above the signal head. Indications of these Approach
>signals are as follows :-
>FY or Y = Home Arrival signal is at Stop.
>Y & DSI indication = Home Arrival signal at Proceed for turnout.
>G = Home Arrival signal at Proceed for straight route.
>
>That's about all of it. Now, who was it who said QR signalling was simple?
>Soon, I hope to do a web page devoted to QR signalling in its entirety. I
>will post a bulletin when it is on line although it will be some months
>away. Feel free to email me if anyone has questions.
>
>Regards
>
>Matt Smith
>Brisbane, Queensland
>matticue@corplink.com.au
>
>You can't slam a revolving door.
>
>
>
>