To the casual observer travelling down Interstate 95 from New Haven, CT into New York City along (primarily) the right side of I-95 heading south is one of the oldest electrical transit railroad lines within the Northeast Corridor. It starts at Boston and terminates at Washington, DC (unless it has been extended, please correct me and I will update here...) This line is single phase for transit car operation and is 11 kv, although multiple phases are visible. I believe it was originally designed for that voltage from its inception. A great many of the original structures from the early teens still stand supporting multipart insulators and the original caternary construction techniques right from its conception. In this day of rampant upgrades of similar infrastructure, many miles of these nearly-century-old structures still proudly stand. And in support of the ultra-speed Amtrak route between Boston and NYC. So, here you have a quick look at one from Jill McLaughlin (NYC) sizing up what this vintage line still looks like.... On the far left is a relatively so-called newer line. It is about 138 kv owned by the United Illuminating Comany, referred to the NY-NNC interconnect. It is one of six electricity transfer lines between ISO-NE (Independent Service Provider New England) and the New York Power Grid. 60-cycle disturbances distantly carried along said line from as far away as Ohio possibly caused the southwestern part of CT to also go into darkness during the 2003 NY-area blackout.