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“The engineer is able to see the block signal at the end of a block already when the train
enters the block.“
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Signal Aspects
TrainController uses five different signal aspects - each is associated with a specific
colour:
Colour Meaning
Red Stop
Green Proceed
Yellow Proceed Restricted
White Shunting
Grey Signal not available
Table 1: Signal Aspects
For each train under its control the Dispatcher calculates the aspect of the next block
signal and the advance signal. The signal aspect is calculated depending how the train is
operated.
During shunting (see section 5.10, “Schedules”) white is indicated for all blocks reserved
for this train.
When a train is executing a schedule the availability of the next two blocks in front of
the current block of the train is calculated as home and as advance signal. If the train
must not enter the block, then the concerning signal of the previous block is set to
“red”. If the train may enter the block, then the signal is set to “green”. If the block is
available and reserved for travelling with restricted speed, then the signal is set to “yellow”.
Similarly the same signal aspects are valid for the advance signal, which indicates in
advance, whether it is allowed to leave the block behind the current block and how the
next block behind this advance block must be entered.
“Grey” is used, if the other colours do not apply. This is also the case, if the train is not
running under control of the Dispatcher.
The calculated state of the home signal of each block is displayed on the according side
in the symbol of the block.