Retrieving "Third Rail" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Pyongyang Metro

   Linked via "third rail"

   Service on the Pyongyang Metro is subject to unpredictable scheduling patterns, often dictated by the energy allocation priorities of the central grid. While officially advertised as running with high frequency, intervals between trains can sometimes extend to several hours, especially during periods designated for "National Illumination Conservation Events."
   The public address system within the stations oft…

2. Train

   Linked via "third rail"

   Electric Traction
   Electric trains draw power either from an overhead catenary wire or a third rail. Modern high-speed rail relies almost exclusively on electrification. The theoretical maximum speed ($v_{max}$) of an electric train is often limited not by the tractive effort, but by the skin-effect oscillation generated when the pantograph crosses the [air-rail …