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 ABS, yards = pot's/dwarf signals. sidings.. oh, it will depend on how much human hands would normally destroy the signals if accidently hit, pretty much true for yards as well. And what I can afford (and already have.[;)]) thanks for the reply [quote]QUOTE: Originally posted by dehusman The placement of the signals depends on whether the dispatcher controls the signals and the siding/junction switches (CTC) or the signals just keep the trains from running into each other (ABS). In CTC the switches at the ends of sidings and at junctions are normally controlled by the dispatcher. Each controled switch has a signal governing an entrance to the switch. At a siding there are three ways in (main from the east, main from the west, and from the siding) so there are 3 signals. At a crossover there are 4 ways into the switches (main 1 east, main 1 west, main 2 east, main 2 west) so there would be 4 signals. In ABS another method tells the trains how far they can go (train orders or track warrants) so you have signals at each end of the siding on the main, one signal in each direction just beyond the switch. of the siding. In both ABS and CTC there are "intermediate" signals located every 2-4 miles between the sidings. Dave H. [/quote]
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