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Old May 24th, 2012, 03:19 AM   #241
Silly_Walks
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Quote:
Originally Posted by Highcliff View Post
people
why the chongqing goverment chose some lines as monorail? Couldn't every lines to be normal subway instead of monorail?
Because of big differences in height.
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Old May 24th, 2012, 06:52 AM   #242
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exactly. Chongqing is like San Francisco in topography, roads are all steep ups and downs.
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Old May 24th, 2012, 10:27 PM   #243
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That explains why it's not underground but not why mono- instead of bi-rail was chosen.
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Old May 24th, 2012, 11:33 PM   #244
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Quote:
Originally Posted by Woonsocket54 View Post
That explains why it's not underground but not why mono- instead of bi-rail was chosen.
Less use of concrete, steel and quieter? (see http://www.newworldencyclopedia.org/...ail#Advantages)




Last edited by skyridgeline; May 24th, 2012 at 11:56 PM.
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Old May 25th, 2012, 09:34 AM   #245
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Quote:
Originally Posted by Woonsocket54 View Post
That explains why it's not underground but not why mono- instead of bi-rail was chosen.
I answered "Couldn't every lines to be normal subway instead of monorail?" with:

"Because of big differences in height."



Monorail can handle greater gradients than regular metro.
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Old May 25th, 2012, 07:24 PM   #246
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so...
I hope the next lines will be openned as subway...these two monorail lines will be the only lines as monorail, not more than this, won't they?
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Old May 25th, 2012, 09:07 PM   #247
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Quote:
Originally Posted by Highcliff View Post
so...
I hope the next lines will be openned as subway...these two monorail lines will be the only lines as monorail, not more than this, won't they?
"CRT is a unique metro system in China in that most lines use heavy monorail technology. Due to Chongqing's surrounding geography as a hilly, multiple-river city, it is not feasible to construct an all-heavy rail tunnel system given the depths of some many of the stations as one transports through the network. For this reason, only two lines are planned to be heavy-rail while all others are planned to be straddle-beam monorail using heavy vehicles."
http://en.wikipedia.org/wiki/Chongqing_Rail_Transit


Not sure if this is only about lines 1, 2, 3 and 6, or also about other future lines.
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Old May 25th, 2012, 10:54 PM   #248
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what are the advantages of heavy rail compared to heavy monorail? In other words, why didn't they build only heavy monorails?
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Old May 25th, 2012, 11:53 PM   #249
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what are the advantages of heavy rail compared to heavy monorail? In other words, why didn't they build only heavy monorails?
Because heavy monorail still has less capacity than heavy rail, I think.
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Old May 26th, 2012, 07:01 AM   #250
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Not true.
The new Sao Paulo monorail system is being built for potential ridership levels of 49,000 pphpd.............far higher than most subways/metros.
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Old May 26th, 2012, 08:26 AM   #251
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Quote:
Originally Posted by Silly_Walks View Post
"CRT is a unique metro system in China in that most lines use heavy monorail technology. Due to Chongqing's surrounding geography as a hilly, multiple-river city, it is not feasible to construct an all-heavy rail tunnel system given the depths of some many of the stations as one transports through the network. For this reason, only two lines are planned to be heavy-rail while all others are planned to be straddle-beam monorail using heavy vehicles."
http://en.wikipedia.org/wiki/Chongqing_Rail_Transit


Not sure if this is only about lines 1, 2, 3 and 6, or also about other future lines.
I think that also applies for the future stations.
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Old May 26th, 2012, 09:51 PM   #252
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Quote:
Originally Posted by ssiguy2 View Post
Not true.
The new Sao Paulo monorail system is being built for potential ridership levels of 49,000 pphpd.............far higher than most subways/metros.
Ok, so why would Chongqing not just build all-monorail? Why still those two regular metros? If it's not capacity, what is it? Cheaper to build? Cheaper to buy carriages?
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Old May 27th, 2012, 04:01 AM   #253
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I guess sourcing of vehicles takes less with fixed steel rail vehicles.
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Old May 27th, 2012, 04:51 AM   #254
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Each mode has its niche.

If an at-grade corridor exists for much of the length of a line, conventional rail makes sense.

If a line must be elevated for much of its length, monorail should be consider.

Extensive tunneling doesn't necessarily favor conventional rail, especially if the conventional rail trains get power from overhead wires, or if the tunnels are of cut-and-cover construction. The monorail trains from Bombardier have a cross-section height similar to most light rail trains, and the monorail trains from Scomi aren't much taller.

In the United States, the chief argument against monorail is that each of the major train suppliers (Bombardier, Scomi, and Hitachi) offers a unique train design, so a single train manufacturer is locked-in once a line is built. This represents a major marketing failure on the part of the monorail train manufacturers. Until they adopt a common standard for guideway dimensions and platform heights and clearances, monorail will be dismissed from consideration early in the planning process for new transit lines.
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Old June 7th, 2012, 09:07 AM   #255
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Quote:
The south extension of Chongqing Rail Transit Line 3 and Shapingba-Universities Town extension of line 1 are expected to be put into service in 2012, according to Chongqing Urban and Rural Development Commission these days.


The total operation mileage of rail transit reached 75 kilometers in Chongqing by the end of 2011, with daily passenger volume of 700,000 people on average.


Chongqing will spare no efforts to push the rail transit construction, including the circle line and line 4, 5, 9 and 10, in order to provide more convenience for citizens.
http://english.cqnews.net/html/2012-...t_16357160.htm
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Old June 7th, 2012, 09:05 PM   #256
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excellent, wonderful news!
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Old June 9th, 2012, 10:00 AM   #257
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excellent, wonderful news!
It seems that Lines 1 and 3 are complete

Last edited by everywhere; June 9th, 2012 at 10:06 AM.
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Old June 9th, 2012, 08:57 PM   #258
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Which of those new line will be standard Metro and which Monorail?
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Old June 11th, 2012, 03:33 PM   #259
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Quote:
Originally Posted by ssiguy2 View Post
Which of those new line will be standard Metro and which Monorail?
Lines under construction

Line 6 phase 1 - heavy rail subway - opens late 2012

Line 1 phase 2 - heavy rail subway - opens 2013

Line 3 phase 3 - heavy monorail - opens 2014

Line 2 phase 3 - heavy monorail - opens 2014
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Old June 12th, 2012, 10:12 PM   #260
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Quote:
Originally Posted by Silly_Walks View Post
Because heavy monorail still has less capacity than heavy rail, I think.
Quote:
Originally Posted by ssiguy2 View Post
Not true.
The new Sao Paulo monorail system is being built for potential ridership levels of 49,000 pphpd.............far higher than most subways/metros.
people
don´t you know the são paulo government are being very criticized?
nothing city in the world experimented a high capacity monorail line...
it divides opinions in são paulo...it is polemical...
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