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| Re: PHOTOS..Reverse Charter Move At Clark Tower (497927) | |||
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Re: PHOTOS..Reverse Charter Move At Clark Tower |
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Posted by ChicagoPCCLCars on Wed Oct 3 08:50:49 2007, in response to Re: PHOTOS..Reverse Charter Move At Clark Tower, posted by Fred G on Wed Oct 3 07:17:54 2007. Thanks to Fred and to Easy.I'm surprised it hasn't been noted how frugal CTA interlocking signalling is. "All Stop", "Proceed on Main", "Proceed on Diverging" are given using only three lights. Position is as important as color. The bottom light below the signal plaque is yellow and only illuminates in the "Call On" indication. Our cab signal system is active throughout any interlockings, giving allowable speed indications and rear end protection. Most Chicago "L" lines do not have wayside block signals. On the Blue line, the waysides are being removed on the Forest Park branch (Congress line). So far cab signalling is cut in from the terminal at Forest Park east to Western AV. David Harrison |
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