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| Re: A new topic for discussion, electrification to Port Jeff and Patchague (1515928) | |||
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Re: A new topic for discussion, electrification to Port Jeff and Patchague |
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Posted by WillD on Sun Jun 16 11:12:50 2019, in response to Re: A new topic for discussion, electrification to Port Jeff and Patchague, posted by lirr42 on Sat Jun 15 17:03:23 2019. then we should string overhead wire from Manhattan to Montauk for the sake of regional consistency and interoperability.Why would we want to do that? Plenty of systems around the world feature legacy DC systems for significant portions of the line while high voltage AC is used for all extensions. The LIRR just happens to have its legacy DC system on the ground, but that makes no real difference. There does not need to be any change to the existing LIRR 3rd rail to electrify the diesel branches in a cost effective manner. They would need to buy all new equipment Why would we want to do that? How would the operation of multisystem EMUs on the existing diesel branches result in any changes for the existing DC fleet and how they're utilized on the portions of the system currently equipped with 3rd rail? The dual modes are to be replaced anyway and the C3s may have to go with them, but there would not be a wholesale changeover in EMU fleets. it wouldn't be interoperable with the existing fleet. Why would we want to do that? Why couldn't the specification be written such that "Full interoperation with existing M7 and M9 fleet" was built into any multisystem EMU? Admittedly, the MTA does not hold the operation of dissimilar vehicles in particularly high regard, but it's hardly something which would automatically be ruled out by electrifying the east end of the island in a cost effective manner. They would need to maintain two distinct systems and related infrastructure. I'd argue their current maintenance of two distinct types of rolling stock when they could be maintaining a nearly 100% EMU fleet which can be specified to be similar to the EMUs they currently possess is a bigger disadvantage. The diesel push pull fleet shares nothing in common with the M7s, while at least the principles of electric operation are similar with regards to maintaining catenary and 3rd rail. |
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