Beijing and Shanghai are the two largest cities in China. There is enough demand to justify trains. There are also at least 50 daily flights between the two cities.
Now what is the demand between Minneapolis and Toronto?
Improved transport infrastructure tends to induce demand. We're familiar with this in terms of highway widening, from the paradox that widening highways tends to not improve traffic speeds. Famously Los Angeles today sees comparable net travel speeds as existed in the age of horse-drawn transport, though of course far more net daily passenger miles.[1]
Another example I like to cite is of Denver, CO, which grew roughly seven-fold in population in the decade after it was linked to the then-new US Transcontinental Railroad, 1870--1880:
Rail build-outs competing with existing air links is another matter of course, though experience in Europe, Japan, and China should help provide useful data.
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Notes:
1. Discussion of LA freeway speeds generally, noting several stretches (including those recently widened) netting < 20 mph: "Five years after Sepulveda Pass widening, travel times on the 405 keep getting worse" (2019) <https://la.curbed.com/2019/5/6/18531505/405-widening-traffic...>. I'm not finding the specific horses-to-cars comparison though I'm sure I've encountered it before.
The twin cities MSA has a population of about 3.7 million, the Toronto CMA 6.2 million, so Chinese cities at a similar metropolitan area population and distance would be Kunming and Changsha. Which see 20 trains a day per direction, not counting the slower sleeper trains (and also 10-12 flights per day).
The population comparison is misleading. Kumming and Chiangsa are part of Shanghai–Kunming railway. The trains between these two cities don't stop at either, but connect all the stations on the larger railway. Compare that to flights between Minneapolis and Toronto. The majority of passengers are point to point, as transit passengers from Minneapolis probably take hubs such as Chicago or NYC, not Toronto. There are up to 6 daily flights between MSP and YYZ, so up to 600 passengers daily. That'd fill up less than a train. That doesn't justify a high speed passenger train connection between the two cities.
The original assertion is that train can probably replace airplane on this route. That doesn't make any sense.
> and also 10-12 flights per day
That are probably those who want to travel directly between the two cities. So even though train option exists people still choose to fly.
> Kumming and Chiangsa are part of Shanghai–Kunming railway. The trains between these two cities don't stop at either, but connect all the stations on the larger railway.
Which would be the same for a North American rail network. Kunming was Minneapolis in this analogy, trains to Toronto could carry on to Boston or Montreal or New York just as trains to Changsa carry on to Shanghai.
> The original assertion is that train can probably replace airplane on this route.
I don't think anyone claimed that it would replace planes completely. It could be competitive, it could be an option for people who want it.
> Maybe we should build more railways. The ground is more stable than the air.
As if this accident could have been avoided if there were trains between Minneapolis and Toronto. I am saying that is wrong, because the passengers on this route wouldn’t take train. High speed trains would help if there is enough demand. There is not. Your examples are for a different market that don’t apply. You didn’t prove otherwise.
Trains are good. I love trains.
> It could be competitive, it could be an option for people who want it
> As if this accident could have been avoided if there were trains between Minneapolis and Toronto
You don't have to replace every flight to reduce the amount of flights, or to give people an alternative.
> High speed trains would help if there is enough demand. There is not. Your examples are for a different market that don’t apply. You didn’t prove otherwise.
The population sizes are the same. The geography is similar. The differences are political choices, not immutable facts.
Another example I like to cite is of Denver, CO, which grew roughly seven-fold in population in the decade after it was linked to the then-new US Transcontinental Railroad, 1870--1880:
<https://www.uncovercolorado.com/colorado-train-stations/>
Rail build-outs competing with existing air links is another matter of course, though experience in Europe, Japan, and China should help provide useful data.
________________________________
Notes:
1. Discussion of LA freeway speeds generally, noting several stretches (including those recently widened) netting < 20 mph: "Five years after Sepulveda Pass widening, travel times on the 405 keep getting worse" (2019) <https://la.curbed.com/2019/5/6/18531505/405-widening-traffic...>. I'm not finding the specific horses-to-cars comparison though I'm sure I've encountered it before.