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| Re: On this date in 1976... (1431841) | |||
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Re: On this date in 1976... |
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Posted by Henry R32 #3730 on Fri Mar 31 22:50:59 2017, in response to Re: On this date in 1976..., posted by WMATAGMOAGH on Thu Mar 30 22:47:24 2017. Oddball yes, but also superior. I'm thinking the two reasons why NY got them and no one outside the US did (or ever will):1. NYC roads are wider and thus, cut and cover of 4 tracks versus 2 didn't add much difficulty. 2. For NY area surface routes, the train came before the development. Since cities are now built up before they install a subway, almost all new designs are going to be deep bore or highway median. Few medians can fit more than two tracks, and deep bore has a linear additional expense for each new tunnel as opposed to the incremental expense of a wider cut. |
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