from Hacker News

Driving blind: NYC subways steered by 1930s tech, paper maps and a lot of hope

by haltingproblem on 1/17/25, 3:00 AM with 2 comments

• by ilaksh on 1/17/25, 9:18 AM

  Why does it cost $5 billion to upgrade? The article says they have a working, reasonably modern system.

  So is it $5 billion worth of excavations or construction? How much does it really cost to add these cables? Couldn't the cables go in metal tubes attached to the walls of the tunnels? How does that cost $5 billion?

• by stuaxo on 1/17/25, 4:03 PM

  This Geoff Mashall video has some signalling systems from the 1880s and ends on some up to date ones.

  https://youtu.be/UCXav-ptPeA?si=UzzyU8FSV11a67fN