4 ms·

> to get high-speed trains running from Merced to Bakersfield by 2030 Isn't that going to be the world's slowest "hi-speed" train ?

by grecy 3y ago

saagarjha 3y ago
220 miles per hour is nothing to sneeze at.
- Retric 3y ago
  That’s 50% faster than Acela (150mph) which isn’t nothing, but doesn’t make much of a difference on its own. What’s actually important is maintaining high speed for most of the trip which is where Acela fails (~70.3 mph). https://en.wikipedia.org/wiki/Acela https://en.wikipedia.org/wiki/Acela
  - fransje26 3y ago
    > What’s actually important is maintaining high speed for most of the trip which is where Acela fails (~70.3 mph). Reminds me of high-speed rail in France vs high-speed rail in Germany. To the point that newer Siemens trains will have a lower top-speed, because "there is no demand for it".
    - ldng 3y ago
      In France, it depends a lot on the lines : Paris-Lyon has average of 270 km/h (167 mph); Paris-Bordeaux clock at around 300 km/h (186 mph) while Paris-Brest is more at 200 (124 mph). It is interesting to note that it often seems ti correlate to the age of the line, with Paris-Bordeaux being the most recent.
      - fransje26 3y ago
        Yes, but they are limited by the technology used to build the line, and by how the lines were traced, but not because their high-speed trains need to stop at every city center or run on "winding" tracks, as is the case in Germany. The Paris-Lyon line is by far the oldest, and is top-speed limited because of how it was traced. (And also because of its out-dated security system that is in the process of being changed) The Paris-Brest line stops being a high-speed track in Rennes, so even if the first part is fast, it's still a long way to Brest on conventional tracks. The newer lines are faster, as they are designed for theoretical operational speeds of 350 km/h, with a current operational top speed of 320. (LGV Sud Europe Atlantique, LGV Rhin-Rhone, LGV Est, and even the LGV Bretagne Pays-de-Loire going to Brest)
VBprogrammer 3y ago
If I understand it correctly the definition of high speed rail in the UK is above 125mph. Apparently that's the fastest you can safely use conventional line side signalling (traffic lights).

> to get high-speed trains running from Merced to Bakersfield by 2030 Isn't that going to be the world's slowest "hi-speed" train ?

by grecy 3y ago

> to get high-speed trains running from Merced to Bakersfield by 2030 Isn't that going to be the world's slowest "hi-speed" train ?

saagarjha 3y ago

220 miles per hour is nothing to sneeze at.

Retric 3y ago
That’s 50% faster than Acela (150mph) which isn’t nothing, but doesn’t make much of a difference on its own. What’s actually important is maintaining high speed for most of the trip which is where Acela fails (~70.3 mph). https://en.wikipedia.org/wiki/Acela https://en.wikipedia.org/wiki/Acela
- fransje26 3y ago
  > What’s actually important is maintaining high speed for most of the trip which is where Acela fails (~70.3 mph). Reminds me of high-speed rail in France vs high-speed rail in Germany. To the point that newer Siemens trains will have a lower top-speed, because "there is no demand for it".
  - ldng 3y ago
    In France, it depends a lot on the lines : Paris-Lyon has average of 270 km/h (167 mph); Paris-Bordeaux clock at around 300 km/h (186 mph) while Paris-Brest is more at 200 (124 mph). It is interesting to note that it often seems ti correlate to the age of the line, with Paris-Bordeaux being the most recent.
    - fransje26 3y ago
      Yes, but they are limited by the technology used to build the line, and by how the lines were traced, but not because their high-speed trains need to stop at every city center or run on "winding" tracks, as is the case in Germany. The Paris-Lyon line is by far the oldest, and is top-speed limited because of how it was traced. (And also because of its out-dated security system that is in the process of being changed) The Paris-Brest line stops being a high-speed track in Rennes, so even if the first part is fast, it's still a long way to Brest on conventional tracks. The newer lines are faster, as they are designed for theoretical operational speeds of 350 km/h, with a current operational top speed of 320. (LGV Sud Europe Atlantique, LGV Rhin-Rhone, LGV Est, and even the LGV Bretagne Pays-de-Loire going to Brest)

VBprogrammer 3y ago

If I understand it correctly the definition of high speed rail in the UK is above 125mph. Apparently that's the fastest you can safely use conventional line side signalling (traffic lights).