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ICE test train reaches speeds of up to 405.0 km/h

deutschebahn.com

11–20 of 152 posts

Re: ICE test train reaches speeds of up to 405.0 km/h

#11

Amdahl's law in effect - which is the reason trains in Germany top out at 300 and most at 250.

Re-read it, as I didn't recall it properly: [0]

"the overall performance improvement gained by optimizing a single part of a system is limited by the fraction of time that the improved part is actually used"

[0]: https://en.wikipedia.org/wiki/Amdahl%27s_law

Re: ICE test train reaches speeds of up to 405.0 km/h

#12
post #4

'ICE' here means Intercity Express [0] and not internal combustion engine. [0] https://en.wikipedia.org/wiki/Intercity_Express

Recently took some of these in Germany, was a pretty pleasant experience! It was a bit odd how the ticket prices seem to fluctuate a lot over there based on timing (like 20 EUR if you buy half a week ahead of time, closer to 40 EUR nearer to travel date, at least in my case) but I much preferred taking the train over flying.

For every train, there is a fixed number of tickets per price category. So sometimes, you can still find cheap tickets ("super sparpreis") a day before because thag specific train didn't have many bookings:)

Re: ICE test train reaches speeds of up to 405.0 km/h

#13
post #8

I fear that the general public in Germany will not be praising this achievement. The once efficient and punctional trains in Germany have deteriorated severely in the past years due to lots of delayed maintenance causing lots of delays and even regular cancelations of trains. Also the road infrastructure is suffering from delayed maintenance.

Interesting; America seems to be suffering the same fate. It takes municipalities years to fix highways. The main highway running through Silicon Valley, 101, has been under construction for more than a decade and is in dire need of improvement. It seems the network of roads built in the 40s, 50s and 60s just can no longer be done efficiently.

> America seems to be suffering the same fate

Not uniformly. New York's LIRR (90 to 95% [1]) and Metro-North (99% [2]) feature on-time rates that rival the Swiss (93% [3]).

[1] https://www.osc.ny.gov/files/reports/pdf/report-9-2025.pdf

[2] https://wpdh.com/metro-north-on-time-reliability/

[3] https://reporting.sbb.ch/punctuality?=&years=1,4,5,6,7&scrol...

Re: ICE test train reaches speeds of up to 405.0 km/h

#14
post #8

I fear that the general public in Germany will not be praising this achievement. The once efficient and punctional trains in Germany have deteriorated severely in the past years due to lots of delayed maintenance causing lots of delays and even regular cancelations of trains. Also the road infrastructure is suffering from delayed maintenance.

That's exactly it, it's not the new top speed they need, they lack efficiency. And it's not just Deutschebahn. For example BVG, who runs busses and U-bahn in Berlin is even less reliable.

I think higher speeds can help efficiency. For example it can help catch up a train that has been delayed.

Re: ICE test train reaches speeds of up to 405.0 km/h

#16
post #4

Earlier quoted context omitted.

Recently took some of these in Germany, was a pretty pleasant experience! It was a bit odd how the ticket prices seem to fluctuate a lot over there based on timing (like 20 EUR if you buy half a week ahead of time, closer to 40 EUR nearer to travel date, at least in my case) but I much preferred taking the train over flying.

For every train, there is a fixed number of tickets per price category. So sometimes, you can still find cheap tickets ("super sparpreis") a day before because thag specific train didn't have many bookings:)

Like a train ticket that spans the year break (depart December 31, arrive January 1).

Re: ICE test train reaches speeds of up to 405.0 km/h

#17
post #8

I fear that the general public in Germany will not be praising this achievement. The once efficient and punctional trains in Germany have deteriorated severely in the past years due to lots of delayed maintenance causing lots of delays and even regular cancelations of trains. Also the road infrastructure is suffering from delayed maintenance.

It is a pretty limited achievement as-is: ignoring maglevs, a tgv test train reached 575 kph back in 2007, and China had test trains reaching 487 in 2011.

China’s next-gen is being deployed with goals of a 400kph service speed.

Re: ICE test train reaches speeds of up to 405.0 km/h

#18
post #8

I fear that the general public in Germany will not be praising this achievement. The once efficient and punctional trains in Germany have deteriorated severely in the past years due to lots of delayed maintenance causing lots of delays and even regular cancelations of trains. Also the road infrastructure is suffering from delayed maintenance.

Interesting; America seems to be suffering the same fate. It takes municipalities years to fix highways. The main highway running through Silicon Valley, 101, has been under construction for more than a decade and is in dire need of improvement. It seems the network of roads built in the 40s, 50s and 60s just can no longer be done efficiently.

That’s largely a California problem. Here in Texas we are building highways on top of highways.

Re: ICE test train reaches speeds of up to 405.0 km/h

#19

Amdahl's law in effect - which is the reason trains in Germany top out at 300 and most at 250.

Re-read it, as I didn't recall it properly: [0] "the overall performance improvement gained by optimizing a single part of a system is limited by the fraction of time that the improved part is actually used" [0]: https://en.wikipedia.org/wiki/Amdahl%27s_law

Thanks for the quote, Germany has (too) many stops on the ICE lines (often for political reasons) and those are the limiting factor, not the top speed. The best train in Germany is Berlin->Frankfurt, not because of the speed, but the "Sprinter" version does not stop.

Re: ICE test train reaches speeds of up to 405.0 km/h

#20

'ICE' here means Intercity Express [0] and not internal combustion engine. [0] https://en.wikipedia.org/wiki/Intercity_Express

And also not the organization currently force-relocating innocent civilians to detention camps.

I wonder if the Germans will end up having to rename the train system at some point.

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