Signals
Since Conrail acquired so many separate railways, and the North American railway signalling system is not standardized, operators needed to qualify on as many as seven different signalling systems. The varying systems include, but are not limited to, the PRR position light signals, the NYC searchlight signals, and the EL tri-light signals. Most of the existing technologies were defined by the Northeast Operating Rules Advisory Committee (NORAC). Conrail itself even had its own, unique tri-light signal modernization program that was applied to many routes. Today, most Northeastern railroads associated with former Conrail assets are working towards standardization of all systems as vertical color light signals. Meanwhile, Amtrak uses a modified version of the PRR position light signals called "Position Color Lights."
Read more about this topic: Conrail
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