KenD Wrote:I would like to know where I could get some information on the way Signalling principles are set out for ERTMS.
Traditionally control tables have been used for classical signalling but would these be appropriate (with modifications) for ERTMS?
Also an example of the data constructs would be great.
regards
KenD
ERTMS is about the "air-gap" between a train and the infrastructure- the messages which pass via radio or balise. It is perhaps analagous to the way a driver reads a lineside signal to ensure that the driver can correctly interpret the signal (colour, route inicator, flashing etc). The majority of signalling principles (certainly those shown on a Control Table) are about the interlocking requirements which are not about ERTMS per se. That is not to say that introduction of ERTMS may not mean that it is possible / beneficial / advisable to change from historic practices with lineside signalling but there are not "ERTMS Principles" as such.
So yes a Control Table very like, or vaguely like lineside signalling is applicable to ERTMS level 2 and this reflects the interlocking controls. The RBC also does stuff and either this would need to be added on the Control tables or depicted in a different manner. This is a subject I could discuss at length but I suspect it may not be of particular use in the IRSE exam and would require a base level of understanding of both conventional Principles and ERTMS functionalities that most here would not have.
PJW