Cityflo 650 CBTC

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CITYFLO 650

Company type	Radio-based true moving block CBTC railway signalling system
Industry	Rail signalling
Headquarters	Bombardier Transportation Rail Control Solutions, Årstaänsvägen 29, Stockholm, Sweden
Website	CITYFLO 650 CBTC system

CITYFLO 650 signalling is a CBTC system designed by Bombardier Transportation (now Alstom). It makes use of bi-directional radio communication between trains and wayside equipment, as well as true moving block technology, to control train operation. Trains report their position via radio, and a wayside signalling system provides movement authorities to the trains via a radio link.