The Future
RETB is now regarded by the rail industry as a redundant technology and is being gradually replaced with the new European in-cab signalling system, ERTMS. The Cambrian line was due to be changed over to the new system by Spring 2010 but was delayed, being commissioned on 11 March 2011. The East Suffolk Line underwent life extension works in 2006 however the RETB system is due for replacement by 2011. Another reason for the replacement of the system is due to the radio frequency licence expiring.
Read more about this topic: Radio Electronic Token Block
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