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Cajon Pass Hill 582 |
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When a signal is placed in a location that is not associated with switches or junctions, its purpose is typically to prevent rear-end collisions with a train ahead. When this type of signal is red, it is usually required that a train stop at the signal, but after doing so, the train may proceed at "restricted speed" (a speed that eliminates the possibility of an accidental collision with a train ahead). When a "G" placard is attached to the signal, it indicates a "grade" signal. In this case, the engineer must slow to restricted speed, but does not need to stop first. June 22, 2002, 6:09 PM |
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