Irish Chieftain wrote:European HSR is a network, and it was planned and built as one
Since when? Care to explain the differences between TGV trainsets and ICE trainsets, or why France uses 25kV 50Hz catenary wires while Germany uses 15kV 16.67Hz wires…? or how about Spain's Talgo 350? If what you say is true, then Ireland (as one of the EU nations with the most vibrant economies) should be seeing high-speed rail lines; but they aren't.The figure thrown around for a HSR network is criminally low, it will take at least $100 billion for what they have planned
Japan's built their Shinkansen network for far lower than that, over more challenging terrain than in CA.
The French network is planned as a system. (However, as Alan Williams has pointed out in November's Modern Railways, the rest of the French rail network is fading away - the TGV connects the main cities but the smaller towns get buses or slow trains.
The Thalys network is also expanding to a plan. It uses the French TGV network as far as Lille and then the extension to Brussels. Soon the Belgium extension to Antwerp will open, and on to Amsterdam, and Koeln.
The extension of the TGV southwards will be a connection to Barcelona (standard gauge) and then an addition to Madrid - which may open before the TGV line. Spain is also planning a TGV line to Portugal. That will also be standard gauge.
The main problem in Europe is different standards for electrification. Britain and the newer systems use 25kv AC, but there are large areas of DC 3000v in Belgium and 1500v in Netherlands, which for example Eurostar has to be designed to use. In the middle is the German, Austrian, Swedish, Norwegian group of countries with a different AC network (whose details I can never remember, but the voltage and Hz rate are odd). And then Italy has 3000v (I think)DC, as also Poland and some other east European systems. New lines are standardised at 25kv AC.
Multi-voltage locomotives and trains are common. Then there are signalling systems. The European Commission would like to standardise these, but it will take a long time to do so.
Britain of course has another problem, with a rather narrow and low loading gauge so that trains from the mainland can't pass most of our tracks. The CTRL will bring mainland standards as far as St Pancras London.
The Belfast-Dublin line is signalled for 100 mph. The NIR (Northern ireland Railways) would like to have 125 mph but that would take money.