Started by Sirius, April 27, 2020, 10:51:28 PM
0 Members and 1 Guest are viewing this topic.
QuoteRETB 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.
QuoteThe rugged terrain and light line traffic made it cost-prohibitive to install GSM-R for these areas and so a new radio system, with new base station and on-train equipment, was developed. This allows RETB to continue to operate on Band III Sub Band 1
QuoteIn 2013 Comms Design were selected by Network Rail to design and deliver a new RETB system for the North and West of Scotland. Additionally, as experts in RF systems, we planned the full radio network to ensure high quality radio coverage throughout the route.
QuoteThe RETB Next Generation Project, described in issue 125 (March 2015), is more than a renewal of the current system, as it also mitigates the risk of radio interference when European frequencies for digital television change in December 2015. This means that the current ?Band III sub-band 2? radio equipment will be replaced with new radio equipment operating on ?Band III sub-band 1?.
Quote from: jamespetts on May 13, 2020, 11:55:02 AMmay I ask why this does not work well?
Quote from: jamespetts on May 14, 2020, 10:23:54 AMMay I ask why this together with track circuit block is not sufficient for the dead end cases?
Quote from: jamespetts on May 14, 2020, 10:23:54 AMIs the problem that the block reservation does not go all the way through to the next signal