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| Re: Speeding up timers (1495970) | |||
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Re: Speeding up timers |
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Posted by Stephen Bauman on Sat Dec 15 11:09:22 2018, in response to Re: Speeding up timers, posted by Dyre Dan on Sat Dec 15 08:14:41 2018. the ones they most need to get rid of or speed up are on the 4/5 tracks leaving 125th St. in both directions.I cannot speak for the uptown direction. The timers on the downtown side are needed because the 4/5 out of 125th must diverge south of the station to reach the Lex express tracks. The speed for a diverging switch is usually 10 mph. Unfortunately, the switch is located somewhat south of the station. The train operator will usually limit the speed to 10 mph from the station until the switch is cleared. This effectively limits the Lex express to around 33 tph, instead of the nominal 40 tph. The interlocking is located sufficiently close to the station so that the station entrance isn't cleared until the 4/5 clears it. The station entrance has timers to somewhat mitigate this problem. If the train has cleared the station but not the interlocking, there is a timer for restricted speed. The timer isn't in operation, if there are no trains between the station and the south end of the interlocking. |
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