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Comment by xnx | original | SpaceX catches the Starship to end Flight 15
[−]xnx · 2026-11-15 Sun 03:45 UTC · link
> If that were true, then why doesn't the US have a single high speed train?

Planes are faster, cheaper, safer, require much less infrastructure, go anywhere to anywhere, scale elastically with demand, and have less emissions per passenger mile than high-speed trains.

[−]notahacker · 2026-11-15 Sun 04:10 UTC · link
> and have less emissions per passenger mile than high-speed trains

The optimal high speed train is about two orders of magnitude more efficient than the equivalent flight on a passenger mile basis. Might look a little different for crossing oceans or thin routes where it's really not worth building a thousand miles of rail to replace a flight a day, but lack of demand between nearby cities or is not why the US doesn't have any high speed rail network...

[−]s1artibartfast · 2026-11-15 Sun 05:39 UTC · link
Efficient in what terms? Dollars per mile? In the usa?
[−]notahacker · 2026-11-15 Sun 10:42 UTC · link
emissions
[−]jacobolus · 2026-11-15 Sun 04:52 UTC · link
> Planes [...] have less emissions per passenger mile than high-speed trains.

This claim is not even in the right ballpark.

[−]atwrk · 2026-11-15 Sun 09:55 UTC · link
Not really. I just traveled 1400 km (875 miles) by train in under 6 hours, hotel room to hotel room. Though not in the US, of course.

Planes are faster only when ignoring the time at/to/from the airport.