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View Diary: Sunday Train: Thinking About a Bakersfield Express Bypass (33 comments)

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  •  The Zephyers were faster than the ... (14+ / 0-)

    ... the first Japanese bullet trains ...

    ... as far as the American obsession with top speed goes ...

    ... but the bullet trains got to their destination faster because the corridor was designed to allow them to stay close to their top speed for the majority of their trip.

    That's how the relatively slow Acela was passed off as a HSR system, based on its top speed of 150mph, when it is speed limited by the corridor ~ either turns, slow sections, inability to tilt in Connecticut because the track spacing is too tight, or electrification that limits top speed to more like 130mph, and even that is not attained for big chunks of the corridor.

    90mph Class 5 track or 110mph Class 6 track is what I have been calling "Rapid Rail" ~

    ~ its not what most of the world would consider as HSR, which is normally 125mph and above and with investment in allowing the train to maintain high rates of speed for the majority of the corridor ~

    ~ but its way better than our conventional rail intercity trains which with a top speed of 79 mph often have a transit speed of from 30mph to 45mph.

    In this case, in a section where the train is stopping anyway, its going to have to bring its speed down anyway, so the limit doesn't limit it very much.

    By contrast, slowing a 220mph train down to 110mph for the bottleneck section of corridor through Bakersfield can lose 5min of travel time ... and 5min here and 5min there and you start missing the 2:40 target express trip time.

    All the world's a stage, the theater is on fire, and the lead actors are telling the audience that the smoke is a trick, they should stay seated an enjoy the show.

    by BruceMcF on Sun Jul 06, 2014 at 10:13:11 PM PDT

    [ Parent ]

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