CBTC Train Positioning Explained
In this video, I’ll walk you through the logic behind how CBTC determines train position, step by step. 0:00 - Intro 1:41 - Different train Localization methods 3:52 - How Train Localizes 5:50 - Building blocks 9:30 - Location update after crossing transponder (Odometry) 10:10 - Wheel Diameter Calibration 11:17 - Position Uncertainty 12:52 - Transponder Reading Error 13:34 - Transponder Installation Error 14:29 - Wheel Calibration Error 15:44 - Undetected Slip/Slide 18:07 - Discretization Error (Granularity and Quantization) 20:02 - Correcting with Tag Placement 21:02 - Secondary Speed Input (Speed Sensor/Accelerometer/Doppler Radar) Please note: I’m only explaining the underlying principles and engineering logic. Actual CBTC implementations vary widely between suppliers and remain proprietary. The intent here is educational. This video is part of an ongoing effort to build a comprehensive CBTC series, covering everything from train positioning and architecture to ATP/ATO/ATS, safety logic, and network design. My goal is to create a clear, systematic reference for anyone interested in understanding how CBTC really works. #railway #cbtc #railroad #signalling #railwaysignalling #masterclass
CBTC 101: CBTC Concepts, Standards and Architectures
Evolution of Signaling Explained: Flags, Absolute Block, Fixed Block, to CBTC Moving Block
Introduction to ERTMS and ETCS train control
CBTC Architecture Explained (Part 1): How History Shaped the Design
ATO over ETCS - pilot testing
L/V Ratio (Nadal Ratio) of Derailment Explained
European Rail Traffic Management System (ERTMS): Explained
Axle Counter Explained
What is ETCS? Upgrading Sydney's Signalling
ProRail ERTMS (UK version, 2006)
CBTC: Communications-Based Train Control
EEVblog 1752 - Texas Instruments SCREWED UP the NE5532!
Driving under ETCS L1 control
The Ten-Engine Titan: Inside the B-36 Peacemaker, The Cold War’s Largest Bomber
Coded AC Track Circuits Explained - Part 2 of 2
Crashworthiness in Railways Explained (EN15227)
Nobody understands the point of hybrid cars
Every Type of Railcar Explained in 15 Minutes
EXPLAINED: Overview of changes between ETCS 3.4 to 3.6
