It's no secret that in economic times like these, maintaining the present system is challenging enough. The present capital projects that are underway and planned have claims on every penny and then some that is available. We will see East Side Access, which is a huge expansion in electrification. It will also be the Long Island's first route expansion in perhaps 100 years.
Then there is the mainline third track program which may or may not happen along with mainline grade elimination through Mineola. If the third track becomes a reality, new substations would have to be constructed to handle the increased load.
While not greatly publicized, several new substations have been built to replace temporary construction from the M-1's arrival era. Plandome, Island Park and several other sites have seen very nice new buildings.
The economy is not boosting ridership at eastern points, so electrification projects haven't been discussed in the past several years.
When growth does again start, I suppose Port Jefferson - or Northport, as it was projected, will see the next electrification extension. They were promised electric service by 1950 and then again by 1989. The dual-mode engines were a compromise, sort of a substitution for the electric service promised. I suppose when those engines ened their lives, perhaps in some fifteen years, electrification will be back on the table, and nobody will want to see another dual-mode engine again.
Maybe in our lifetime we'll see them get third rail.
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The Long Island Tool
"... overzealously discharges his duties;
...a "tool" of the administration"