Westerly station has to be renovated with full-high platforms, ADA upgrades to the egresses, restoration of the 3rd track, and outfitting of the MoW yard behind the station into a layover before any of this can happen. Amtrak owns the station and most needs the 3rd track if commuter rail is coming; RIDOT (for homegrown service and as station host for SLE) is going to be the primary user and most needs the ADA and environmental cleanup of the MoW yard. It has to be a joint funding effort between those two, and there's nothing CDOT can do to influence it since they're on the other side of the state line. So forget the hand-wringing about trainsets and state budget deficits in this current fiscal year, because they're going to have to wait their turn indefinitely for the two parties on the other side of the state line to take care of the terminal station.
Right now the ongoing HSIPR grant award in Rhode Island is for finishing up the Kingston station ADA and tri-track upgrades within the construction time limit set by the grant. And right now the #2 commuter rail-related funding priorities RIDOT's actively seeking kickoff $$$ for is building the new Pawtucket station and integrating the RIPTA bus network there (Pawtucket being a big bus hub) and at the other stations that opened in the last 8 years. They need all that to strengthen the existing MBTA service's backbone before they're ready to do Westerly, so it will take time. Probably looking at a TIGER award within 1-2 years after Kingston finishes, then a design-build process, and a renovated Westerly ready to accept CDOT service by 2020-22. And no sooner. This will not be a fast-starts extension, so I don't know why we're worrying so much about FY2016 and equipment assignments in 2016.
By 2020 the diesel roster mass replacement order on MNRR/LIRR will be inked, and CDOT will have figured out what size fleet its share is going to be. ESA will be within couple years of completion by then with reliable estimates available on when project starts can get moving on Penn Station Access, and CDOT will made its decision on whether a supplemental order of EMU's has to be made. And the CT River Bridge replacement will have been done by then, which is a prerequisite for being able to run any sort of meaningful schedule increases past OSB to NLN. Those are the kinds of events that have to churn along before we can peg probable project starts for an SLE poke across the border: design-build and procurement extracurricular that times around end of decade...on BOTH sides of the state line. It makes little sense to worry about current conditions, current fleet numbers, or CDOT getting too far ahead of itself when there's no mechanism that even lets it get too far ahead of itself. Just about the only thing it can act on now is the perfunctory study, and starting a rainy-day piggybank fund for the required Mystic rebuild. Whoop-de-doo...another study. The economy and intra-state train ops are not going to collapse because the Dept. of Studies About Studies is doing another study regarding an area of transit demand.