For those that saw in my comment about the New Haven testing out electrification using an exposed 3rd rail, here's proof http://www.catskillarchive.com/rrextra/3RAIL.Html
and http://www.bera.org/articles/nh3rail.html
The church I work at abuts the old main line. As far as rails go, everything is long gone (the branch was pulled up after abandonment in the 1930s), but there are some clearings here and there.