It wouldn't do too much other then getting the double track on both ends almost up to the viaduct it's self, Using a gauntlet track may be the cheapest means of extending No. 2 track to Port Washington.
The almost 700 feet of gauntlet track would still plague the branch with delays if a train craps out on the viaduct or beyond the clearance point. This allows both No.1 and No.2 tracks to share the viaduct and extent back to double track almost immediately beyond on both sides. If the viaduct can handle that additional construction with no risks then It would be a major cut in cost for extending double track east of NECK.
NIMBYS and the event in RVC back in 1950 would probably put the can on that before it even got to the multimillion dollar study phase.
Compared to building a new viaduct this would be the cheaper alternative.
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