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| Re: MTA removes or increases more speed limits (1507181) | |||
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Re: MTA removes or increases more speed limits |
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Posted by randyo on Sat Mar 16 16:38:38 2019, in response to Re: MTA removes or increases more speed limits, posted by Stephen Bauman on Sat Mar 16 13:51:11 2019. Exactly. basically the only difference between old and new signaling is that new signaling uses solid stat fiber optics rather than movable relays and copper wire. A neighbor of mine who was a signal helper told me that the switches installed at the N/E of W4 St in 1967 were electrically NX even though they were controlled by conventional GRS type levers. |
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