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| Re: Dual third rails on the IRT Els (684921) | |||
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Re: Dual third rails on the IRT Els |
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Posted by Mellow One on Mon Sep 22 14:22:41 2008, in response to Re: Dual third rails on the IRT Els, posted by Chris R16/R2730 on Mon Sep 22 12:41:35 2008. Read the first sentences of the message again. The dual third rails appeared as part of the Dual Contracts mess and waste.Dangerous, certainly, if you do not watch what you are doing, or if you are not supposed to be on the tracks. The Chicago El still uses the open el third rail. The Myrtle Ave El used it up until the lower portion of the line was demolished. The safest method of rapid transit electric contact appears to be overhead wire. However, subway clearances usually dictate the use of a third rail. The NY Central type of underruning third rail is probably the safest variety of that category. The Philadelphia El opted for that type of third rail. I wonder, when the Els converted from steam to electricity, if there was any serious consideration for using overhead wire instead of third rail. After all, there was plenty of open air above the structure. The BRT was committed to surface running with overhead wire for the outlying extensions of the els. The rival ownerships of the troley lines in the Bronx prevented the Manhattan Els from expanding northward or otherwise on surface routes in that quarter. |
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