Re: Question about signal lights on the 7 and trip arms (1510017) | |||
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Re: Question about signal lights on the 7 and trip arms |
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Posted by Steamdriven on Mon Apr 15 07:20:42 2019, in response to Re: Question about signal lights on the 7 and trip arms, posted by Lou from Brooklyn on Mon Apr 15 09:08:59 2019. With full CBTC, why do you need conductors? With the reduced workload, you'd think OPTO would be appropriate. |