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| Re: Speeding up timers (1496089) | |||
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Re: Speeding up timers |
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Posted by Stephen Bauman on Sun Dec 16 11:27:25 2018, in response to Re: Speeding up timers, posted by Dyre Dan on Sun Dec 16 07:41:18 2018. I made several field trips in the 1998-2002 period. The object was to determine what was limiting am rush hour Lex express service levels. Operator variability, scheduled and operating merging conflicts made it difficult to track the actual trains to their schedules. I also did off peak studies at the various stations. I'm grateful that the static and run time feeds no longer make it necessary to get to remote platforms at 7am. Moreover, it's possible to track individual trains for their entire runs.The off peak studies showed that operator variability was the primary problem to efficient operation. The off peak studies confirmed that the existing signal system was by and large capable of 40 tph/30 sec dwell time operation with a few exceptions at a couple of stations. 125th turned out to be a surprise. 14th St was everyone's candidate. It turns out 14th St isn't much of an impediment. Some skeptics went out and confirmed my measurements. There isn't much bang for the buck (service level wise) in straightening out the curves to eliminate the gap fillers. |
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