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CBTC: Communications-Based Train Control

mtainfo · explainer · Watch on YouTube

Transit, cities & urban planningMechanical & precision engineering

What it is

An MTA video on communications-based train control, the system meant to replace the New York City subway's century-old signaling. It also shows the mechanical interlocks and signals in use today.

Why Hacker News recommends it

Cited as a view into how outdated and error-prone NYC subway signaling is, and how antique interlocking systems work.

  • 2 people recommended it
  • 2 different months
  • 0 strong recommendations
  • first 2015, last 2022

What HN commenters said

  1. “There was this great video last year, illustrating how outdated and error prone the signalling technology in the NY subway is”

    Shows how outdated and error prone NY subway signalling is

    peletiah, 2016-04 · Recommendation · in “System Overload”

  2. “Well made video that helps understand the interlocks - if you like antique systems!”

    Explains interlocks in antique subway signal systems

    robocat, 2018-12 · Recommendation · in “Why New York Subway Lines Are Missing Countdown Clocks (2015)”

Excerpts from Hacker News comments, linked to the originals. Summaries and labels were written by a language model from those comments.

Topics: cbtc, nyc subway, railway signaling, interlocking, mta

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