NatalieFeb 1

I know this is anathema to a lot of people on here, but I really wish there was a real search of some kind. I’m looking for people posting about niche stuff and it’s too damn hard!

If you post about train control, especially CBTC, hi.

Show threadDr. SobekFeb 1

@xferok I'm going to poke @q @hopla @rail and @jon as people interesting in trains, in various ways.

I don't think I've seen any post about "CBTC" but there's definitely some expertise around trains in there.

Show thread210561 ✨ [Q]Feb 1
@Sobex @xferok @hopla @rail @jon I know a non zero amount of random facts about CBTC/ERTMS, but by no means an expert
Show threadJon WorthFeb 1
@q Sorry but I know sod all about CBTC. I know a bit more about ETCS! @Sobex @xferok @hopla @rail
Show threadDr. SobekFeb 1

@jon @q @xferok @hopla @rail

What does CBTC stand for, and what does it refer to, btw ? (Sounds like it is signalling related, but I can't place it)

Show threadNatalieFeb 1
@Sobex @jon @q @hopla @rail communications based train control. It’s a train control regime in which trains are able to locate themselves along the right of way and communicate that to a central system, which in turn issues permission to move up to a specified point
Show threadDr. SobekFeb 1
@xferok @jon @q @hopla @rail Is "PTC", positive train control, in the US used to designate CBTC systems ?
Show threadNatalieFeb 1
@Sobex @jon @q @hopla @rail CBTC is a form of PTC, but they’re not coterminous. The PATH, a metro that is technically a mainline, has had its CBTC system certified as meeting its PTC requirement, for example, but really any system that can vitally stop a train upon violation of a signal or movement authority is positive train control.
Show threadNatalie
The trip arms in the NYC (and other) subways can be considered a form of positive train control, because they will stop a train that violates its movement authority (ie passes a red signal)
Feb 1 at 7:59pmWeb
Show threadNatalieFeb 1
Generally speaking, though, in the US, PTC refers to I-ETMS or ACSES, which are both systems that will stop a train if it overruns a red signal and enforce civil speeds, though they do so in very different ways.