A good rule of thumb is that the answer to any comment about #HS2 starting with “Why didn’t they just….” is that they looked at it and it turned out to be a bad idea.
The real reasons why HS2 costs have overrun, according to Heidi Alexander’s statement to parliament on 19 May: one third inflation: the rest things being added [by parliament…] to the spec, and poor cost control. Nothing about how much cheaper the line would be if slower 🧵1/3
And finally, Mark Wild’S HS2 reset is already producing results: more work done at less cost. (And he, incidentally, has told his staff to work to an OOC to Curzon Street opening in late 2037, with a cost of £93.2bn for the whole project to Handsacre Junction)
The reason why HS2's route had to be incredibly straight & intrusive was because it was absurdly over specc-ed for 250 mph line speeds. Rather HS1's 186 mph or 140 mph on a conventional mainline with in-cab signalling. It was fundamentally the wrong project from the outset.
This is still my favourite #HS2 video. The dream is not dead. The Chilterns tunnel and Colne Valley Viaducts are now complete. The Delta Junction and Curzon Street are under construction. The Euston tunnels are being dug. It is all happening! youtu.be/m0-A5hXFMKk?si=fMi6… via @YouTube
The M20 and HS1 at Harrietsham in Kent. Interesting to note that the high speed rail line is both going round a curve and descending, despite this being a 300kph section of the track. So this idea that high speed lines have to be built dead straight and flat is not correct.
It's all nonsense. Check out the new Green Signals podcast on Thursday at noon, when we'll lay waste to this utter rubbish. Here's one Janet-and-John fact to start you off. Slow the trains and you need more of them to run the same service. Costs MORE! youtube.com/@GreenSignals
It is worth reading this story carefully. It says the trains may be tested on slower track (186mph presumably) so they can enter service sooner. It does not say they will NEVER run at 225mph, just that they won’t do so initially….1/2 bbc.co.uk/news/articles/czex…
….Otherwise a substantial section of phase 1 has to be completed and ready for use BEFORE testing can start. If the trains are tested elsewhere, the testing can be done at the same time as the kitting out of the line.
This is what I am reading anyway. Am I incorrect? 2/2