File:TTC interlocking signal.JPG

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Description
English: An interlocking signal on the Toronto Transit Commission's subway system. The yellow-over-green aspect indicates that the train may proceed with caution; the next signal on the line is currently at stop (red). The lunar white lamp at the bottom indicates that grade timing is in effect for the next block, and that the next signal is red only because of grade timing.
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Author Kevin Hadley

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31 March 2012

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current01:57, 1 April 2012Thumbnail for version as of 01:57, 1 April 20122,945 × 4,407 (4.63 MB)KevinHadley
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