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| Re: SAS termini questions (126124) | |||
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Re: SAS termini questions |
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Posted by stephenk on Fri Aug 12 19:50:09 2005, in response to SAS termini questions, posted by stephenk on Fri Aug 12 16:41:34 2005. After being directed to the pdf's I thought I'd answer my own questions, just in case anyone else is the slightest bit interested.1)Will the Hanover Sq terminus have a bi-level island platform/scissors crossover arrangement, as at Whitehall St terminus on the SAS track map found on nycsubway.org (which I assume is not a track map of the current proposals)? No, it will be a 2 track, 1 island platform (most likely with scissors crossover) station that can handle 26tph. 2)Have the plans for connecting the North end of the SAS to the existing IRT network been abandoned, and why? Is the spur just before the line curves in 125th St designed for future connections to the IRT? Is it likely that the SAS could be extended (if it ever gets built in the first place) to run along 125th St and thus interconnect with all of the lines that cross 125th St? It looks like, if the SAS is built, that the tracks won't connect with the existing IRT network, however the spur tracks are designed for future connections. I can't find any evidence of extending the SAS along 125th St (I think its a good idea!) 3) Will the 125th St terminus have a normal island platform/scissors crossover arrangement? It will have a 3 track, 2 island platform layout that can handle 30tph. The overrun tracks will merge into 2 storage tracks. Trains will reverse in platforms. This though does pose a problem. The 3 tracks are needed for a reliable 30tph (although Hong Kong seems to be able to manage 30tph with 2 tracks and 600ft trains!). But having 3 tracks and 2 island platforms can seriously complicate passenger flow (which could potentially delay trains), as well as complicating crew stepping back operations. |
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