Well they could always route half the trains via the Danbury Branch and the other half via the Maybrook Line
RE: electrification, the documents posted so far on the project don’t appear to imply any form of electrification extension from Brewster. Even a Woodlawn/Pelham style changeover from 3rd rail to catenary isn’t seriously considered (unless I overlooked something). The plan appears to involve using either diesel shuttles between Danbury and Brewster with rush hour dual mode consists or 100% dual mode consists throughout the day.
As for the issue of 3rd rail systems being illegal in CT, keep in mind when that legislation was enacted the 3rd rails used in CT were exposed and in the center of the track between the rails (basically a real life Lionel 3 rail track) and unfortunately too many pedestrians and livestock came in contact with it which resulted in the legislation now on the books since the early 1900s. With the political climate in CT being what it is - and the fact that the 3rd rail that could be used is safer than what was in use in CT in the late 1890s - I don’t think it’ll be hard at all to get that law repealed.
In which case next time someone says “electrify the Danbury Branch”, the counter argument of “the trees will take out the overhead wire if there’s a bad enough storm” will be useless so… best not give the politicos in Hartford any ideas
