2 ms·
Now i can imagine some rail being reused for a different line and suddenly trains showing up in the old line on screens in the control room.
by pestatije 4y ago
Now i can imagine some rail being reused for a different line and suddenly trains showing up in the old line on screens in the control room.
- AnimalMuppet 4y agoIt might be worse than that. Rail wears, so the signature probably changes with time, even if nobody moves the rail. Then, in the US, they sometimes use "rail grinders" - specialized trains that literally grind the surface of the rail, in order to remove things like spalling that come from heavy use. That probably changes the magnetic signature, too, a lot faster than regular wear does. That's not insoluble - re-map after you grind. But it does complicate things somewhat.