A similarly embarrassing state of affairs is the train traffic control system used by the NYC subway system: <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=Mjx3S3UjmnA" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=Mjx3S3UjmnA</a>