Railway Direction Indicator

Railway Direction Indicator 

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Railway Direction Indicator 

Railway Direction Indicator :- Direction Indicator is a display along the track side at critical locations that informs the train operator of direction of the path ahead.

 

• This indicators display a text sign based on a command the system management center. The text will indicate the next route as being a mainline move or a depot/shunt move. However they do not indicate that the approaching train has been authorized to proceed along the indicated route.

• Direction Indicators will be provided at locations in which a non- passenger move and a passenger move may be made and at branches.

 

• Direction Indicator is a display provided at facing points where there is a move for which it is necessary, for operational purpose, to indicate the route to be taken to the train operator.

• The SMC will provide the route information via the PLC non-vital outputs to the DI in order for it to illuminate.

 

• The SMC will remove the output indication to the direction indicator when the train has been reported as having passed the direction indicator.

• It is visible to the train operator when the train is stationary.

 

• The aspect displayed shall be Lunar white.

• Mixed Mode Area: At locations where a Direction Indicator is required, and there is a shunt signal(or) main signal required for Metropolitan line trains, both will be provided. This is to give consistent operational instructions to TBTC train driver regardless of location.

 

• The applicable DI will be blanked if the next destination on a SMC route assignment passes through a SCS region where the SCS is operating in DMC or LCP mode.

 

• All the DIs associated with a VCC will be blanked if the communication between the VCC and SMC is severed.

• When RS sign is illuminated, then DIs will not be lit, If the RS and DI are located in the same post.

 

DIRECTION INDICATOR

 

DIRECTION INDICATOR

 

TYPES:

Two series of DI units are required, they are
1. Open section and

2. Tunnel section.
DI Symbol shown in SSP:

DIRECTION INDICATOR

 

 

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