Streak,
The tunnel is 33.5 miles long. Two tunnels would almost double the cost. Freight traffic must be relatively modest or they could not stand the delay involved in switching at both ends. In short, not cost effective.
Mac
MAC: Agree with your conclusions. One has to wonder why not 2 tunnels instead of one ? The Chunnel is two tunnels with several cross overs. Each tunnel can be isolated from the other. The pressure bang that we have all experienced on NEC when 2 trains pass each other in opposite direction. Separate tunnels would not have that except at cross over locations ? Any one know is Goddard base is one or two tunnels ?
I see only two gauges, which would most likely be three rail track.
This looks like a uniquely Japanese response to a uniquely Japanese problem. Not many nations have dual gauge networks operating in the same territory, and very few of those would have to build such long tunnels, few of those would feel the need to operate passenger trains so fast through a tunnel, and even fewer would choose to incur the delay and cost to put narrow gauge cars on standard gauge cars to go through a tunnel.
Paul_D_North_Jr Mistaken or different link ?
Mistaken or different link ?
https://en.wikipedia.org/wiki/Train_on_Train
Interesting take on Japan's new double gauge tunnel. Problems with narrow gauge freight trains and HSR trains. Have to wonder if any application in this country or others ?
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