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by kkysen 340 days ago
The latest tech for CBTC uses UWB for train positioning, which has a precision of a few inches.
1 comments

New York did some trials with UWB several years ago, which were claimed to have been successful. Since then, there has been very little news of permanent deployment or future developments either in New York or elsewhere.

Not sure whether this means that the various signalling suppliers are waiting for a customer to take on the technical risk of being the first to deploy UWB CBTC, or that there were costs or disadvantages that make it unattractive.