Handwaving. Show me the technology, as Musk says about supposedly disruptive battery designs (which are more likely to eventuate).
Clearly you are missing (ignoring?) the future disruptive technologies aspect of my post.
Hint: read the paragraph that started with: "
Do all of the necessary components for a fully distributed "packetized" human transportation system exist today? No."
Trains (coupled vehicles on tracks) are the most efficient period, and it is based on physics first principles, and I've explained it before so I won't explain it again.
On the contrary. I've read your posts on trains vs. Hyperloop, the issues with tunnel boring, etc... and just about all of them are based on the premise of what's possibile with current approaches... and very little (if any) is based on first principles/physiscs applications.
And, yes, you can packet-switch them at a car level, and it's already done routinely in Europe (sigh). More importantly, they're packet-switched at an *individual person* level, which you CANNOT do with privately owned cars (the cars always end up in the wrong place).
And there may be a role for train cars loaded with individual car pods. But to ignore the time/effort required to recouple a train car vs the potential for an automated system to steer individual car sleds at high speed is to ignore the entire point I'm making.[/quote]
Maybe someday sensor electronics will be cheap and reliable enough that "virtual coupling" will be cheaper than mechanical coupling. We're not even close.
Ah... we are finally getting to the crux of the matter: the need to look at what may
be possible, not what today
is possible. And the resultant danger in stating absolutes such as "
You can't get the volume of people-moving without trains. They are the high-volume solution."
And some of those future possibilities may be much sooner or more rapid than you think. Ask those buggy whip folks.
I should make it clear that US trains are ripe for disruption, full of "worst practices"; Tesla could replace and undercut the entire US train industry at all levels with best-practices trains (fully automatic operation, fully automatic coupling, mass produced, battery-powered) which would be much cheaper than existing US trains -- if they don't fool around with reinventing-the-wheel silliness. Hopefully they will.
There's very likely room for more efficient trains int he ultimate solution. That doesn't mean there's not also other solutions.. or that hey may be different parts of an overall puzzle.
(more of your favorite analogy: even when packet switching happened within the core, a number of the existing circuit-switched lines remained... heck many homes still have copper pairs today)
They are the high-volume solution.It's a truly crap analogy for your intention, actually -- used correctly, the analogy demonstrates the superiority of trains. Hilarious.
I'm glad to see the holidays have made your normally cheery disposition even moreso.
Given your apparent lack of understanding of the scope and future aspect of what I'm proposing, and instead intentness on only considering
today's technology, I can understand why you that way. That's why I'm trying to help you to expand your horizons.
(ON EDIT: Just saw the subsequent moderator post. No more responses from me here on this unless it gets carved off to a new thread)