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Old August 23rd, 2016, 04:59 AM   #2281
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Quote:
Originally Posted by dimlys1994 View Post
It's wishful thinking, but because of gases and oil field, you can't build many more of new metro lines in near future. Furthermore, in 1998 there was referendum, which imposed subway tunneling ban.

There's very good video about accident during LA Metro construction in 1995, which is also releated to your question:

But this accident has nothing to do with gasses or oil fields. It was an engineering blunder...man made accident.

Plus, a judge just threw out the court cases by West LA and Beverly Hills folks on that premise, that it is unsafe to tunnel. Technology and methods are so advanced, that methane, gas, oil blunders would be impossible, judge said.

LA has been given the green light.
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Old August 23rd, 2016, 10:17 AM   #2282
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Old August 23rd, 2016, 07:17 PM   #2283
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More pictures of the MLK station tunneling from the Source:





Attentive Source readers know that Harriet the tunnel boring machine has been working her way south under Crenshaw Boulevard, digging the first of twin rail tunnels for the Crenshaw/LAX Line. Today was a good day: the machine broke through into the station box for the Martin Luther King, Jr. Station. Pics above. Please feel free to save and share!

Next stop: Harriet will continue digging toward the future Leimert Park Station.



Question: how do I reduce the size of images in posts? Thank you.

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Old August 23rd, 2016, 09:24 PM   #2284
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How mutch underground stations will the Tunnel habe?
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Old August 23rd, 2016, 09:29 PM   #2285
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How mutch underground stations will the Tunnel habe?
3 underground stations
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Old August 24th, 2016, 02:37 AM   #2286
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How mutch underground stations will the Tunnel habe?
The project will include eight new Metro stations (with a potential ninth infill station currently in the planning stages):

1) Expo/Crenshaw- (underground) – connection to Expo Line
2) Martin Luther King Jr- (underground)
3) Leimert Park- (underground)
4) Hyde Park- (at-grade)
5) Fairview Heights (at-grade)
6) Downtown Inglewood (aerial)
7) Westchester/Veterans (at-grade)
8) Aviation/96th Street (at-grade) – Planned future connection to LAX people mover (aerial).
9) Aviation/Century (aerial)
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Old August 25th, 2016, 02:24 AM   #2287
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http://thesource.metro.net/2016/07/2...-this-weekend/

Decking for Wilshire/La Brea subway









The early work on construction of the new Purple Line subway station at the Wilshire and La Brea is moving along at a nice clip — see the recent pics posted above. The third phase of the decking work at the intersection begins this weekend. Here’s what you need to know:

•Work on the third phase is scheduled to take place for the next 10 weekends with the exception of the Labor Day holiday weekend, Sept. 2 through 5. The original schedule was for 16 weeks.

•The decking work involves replacing the street with concrete decks so that the subway station can be excavated below while car traffic continues to use Wilshire Boulevard. The station when built will be 1,000 feet long, 70 feet wide and 60 feet below street level.

•Wilshire will be reduced to one lane in each direction at 10 a.m. on every Friday during Phase 3 work. Full closure of Wilshire between La Brea and Highland begins each Friday at 8 p.m. and will continue until each Monday at 6 a.m.

•Work will be 24/7 with Metro taking measures to reduce noise as much as possible.

•Below are detours and temporary bus stop locations for the Metro 20 and 720 buses that use Wilshire Boulevard. The gist of it: the 20 and 720 will be using Olympic Boulevard between La Brea and Crenshaw.

•The Purple Line Extension is extending the Purple Line for nine miles to Westwood in three phases. The first phase will extend the line to Beverly Hills with stations located at Wilshire/La Brea, Wilshire/Fairfax and Wilshire/La Cienega. The second phase will add stations in downtown Beverly Hills and Century City and the third phase will add stations at Wilshire/Westwood and Wilshire/VA Hospital. The target completion date for the first phase to Wilshire/La Cienega is late 2023. The project is funded by the Measure R half-cent sales tax increase approved by L.A. County voters in 2008, as well as a federal grant.


http://larchmontchronicle.com/metro-...ends-wilshire/


Wilshire Blvd. excavation and street decking work between La Brea Ave. and Detroit St. on the first of 22 weekends.


Wilshire / Fairfax


Metro’s contractor is beginning the piling installation phase of the Wilshire / Fairfax station construction in August. Wilshire Blvd. between Ogden Dr. and Orange Grove Ave. has been reduced to two lanes in each direction. This lane reduction will last until next year. In the Ogden staging yard for the Wilshire / Fairfax station, sound walls are being installed. They are 24 feet high facing the residential side of the property and 20 feet high facing the commercial side. To ensure that the work is as quiet as possible, loud equipment like generators is being covered by sound blankets.

Wilshire / La Cienega

The Wilshire / La Cienega station area will see more work underway in September. Demolitions there were scheduled for earlier; however, officials said they are delayed due to bird nesting season.

Purple Line Extension project update meetings are held every other month and are open to the public.

The next meeting is Sep. 15 at Cathedral Chapel School. For more information visit: metro.net/projects/Westside.
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Old August 25th, 2016, 09:46 AM   #2288
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Amazing.

To save Money in the future, LA could build Lightmetrosystems.

Like this:

https://en.wikipedia.org/wiki/Medium...ansport_system
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Old August 25th, 2016, 05:23 PM   #2289
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Quote:
Originally Posted by skyfann View Post
Amazing.

To save Money in the future, LA could build Lightmetrosystems.

Like this:

https://en.wikipedia.org/wiki/Medium...ansport_system
Hmmm... I think this would be a bad idea mainly because L.A. already uses two types of non-interoperable trains (light and heavy rail) for its Metro system. I don't really see the benefit of introducing a third type. Nothing wrong with multiple modes per se, but it does mean higher maintenance costs as separate facilities have to be maintained for each set of rolling stock (not to mention maintenance staff have to be trained to work on more types of equipment).

IMHO, L.A. really needs to concentrate more on using grade-separated heavy rail/light rail and should stay away from so much street-running (with level crossings) light rail as even when the trains are given signaling priority they tend to be limited in capacity and slow (viz., the Blue Line from Long Beach versus the totally grade-separated Green Line).

In an example from another city Seattle "cheaped out" by building a large section of its main trunk light-rail line as street-running with level crossings (Rainier Valley) and now faces the problem of limited headways and limited capacity eve though the vast majority of the line is either elevated or else in a tunnel.
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Old August 25th, 2016, 06:01 PM   #2290
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I agree with that, light rail grade separated can be as effective as medium-capacity rail - if it's totally grade separated (like the Green line is currently). Since we're running out of ROWs, there is no choice but to go under or above ground anyway.

Also, there are quite a few corridors where heavy rail can be used in the future: the Sepulveda Valley line, Vermont Ave. line to the Green line, a Red line extension North to Burbank, and East of Downtown to the Arts District and beyond.
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IMHO, L.A. really needs to concentrate more on using grade-separated heavy rail/light rail and should stay away from so much street-running (with level crossings) light rail as even when the trains are given signaling priority they tend to be limited in capacity and slow (viz., the Blue Line from Long Beach versus the totally grade-separated Green Line).
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Old August 25th, 2016, 06:53 PM   #2291
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Originally Posted by etooley1985 View Post
I agree with that, light rail grade separated can be as effective as medium-capacity rail - if it's totally grade separated (like the Green line is currently). Since we're running out of ROWs, there is no choice but to go under or above ground anyway.

Also, there are quite a few corridors where heavy rail can be used in the future: the Sepulveda Valley line, Vermont Ave. line to the Green line, a Red line extension North to Burbank, and East of Downtown to the Arts District and beyond.
Technically the Green Line is a medium-capacity rail line being completely grade separated like a subway but using LRV rolling stock. Similar to the Dockland Light Railway which originally used German light rail trains.
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Old August 25th, 2016, 10:11 PM   #2292
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Originally Posted by skyfann View Post
Amazing.

To save Money in the future, LA could build Lightmetrosystems.

Like this:

https://en.wikipedia.org/wiki/Medium...ansport_system
There is a reason why light metro systems are relatively rare, they combine the disadvantages of both worlds. That is the case at least if you try to build it fully below or above grade, where you'd need expensive tracks and stations which are not that much cheaper than for a full metro but have a substantially lower capacity. It can make sense though to create light rail systems with "light metro" parts in the center, which is exactly what is being done with the regional connector.

So I would suggest to go for largely grade seperated light-rail or if that does not suffice, straight for proper metro. LA could also consider upgrading commuter rail to some S-Bahn or RER like system for longer distance connections.
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Old August 25th, 2016, 11:53 PM   #2293
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Metrolink, which is very vast, should electrify the busiest lines, this is part of the CA high speed rail "blended" plan, or/and the Metrolink Max idea.
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So I would suggest to go for largely grade seperated light-rail or if that does not suffice, straight for proper metro. LA could also consider upgrading commuter rail to some S-Bahn or RER like system for longer distance connections.
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Old August 26th, 2016, 12:49 AM   #2294
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Those MetroLink lines, are they having their own infrastructure or do they have to share tracks with freight rail? And if so, to what extend?

And would there be a potential for speeding up service? More than 1 and a half hour from Union Station to the about 55 miles distant Riverside seems like there could be potential, given the few stops in between.

Having the backbone of Metro Link electrified, with at a good and regular frequency and fastened up a bit would be awesome and I suppose compared to any other measures would bring back a lot of PT potential for relatively little money, compared to building expensive stuff like a metro line. And for the long distances on the eastern side of the urban area, this urban heavy rail system would be perfect to begin with.
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Old August 26th, 2016, 12:53 AM   #2295
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Video: train running under Crenshaw Boulevard

Video: train running under Crenshaw Boulevard, but just removing soil:
https://www.youtube.com/watch?v=F7884GZjalc
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Old August 26th, 2016, 02:24 AM   #2296
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Ive been wondered? say the Crenshaw Line LRT heads north and thru La Cienega. WeHO and Santa Monica Blvd.........this is a high density area. I would assume they prefer (want) HRT.

and how would they make it work at the Hollywood/Highland Station?
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Old August 26th, 2016, 05:47 AM   #2297
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I think they are planning on light rail underground, with a transfer at the Purple and Red lines. I think that the route will follow LaBrea, but some say San Vicente - not sure which one. It would be a continuation of the Crenshaw line, no transfer from that line. It's in Measure M (#27 I think).

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Ive been wondered? say the Crenshaw Line LRT heads north and thru La Cienega. WeHO and Santa Monica Blvd.........this is a high density area. I would assume they prefer (want) HRT.

and how would they make it work at the Hollywood/Highland Station?
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Old August 26th, 2016, 08:05 AM   #2298
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Light rail should be operated on narrow-gauge ROW.

Otherwise, it doesn't seem like light rail...
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Old August 26th, 2016, 08:33 AM   #2299
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Metrolink, which is very vast, should electrify the busiest lines, this is part of the CA high speed rail "blended" plan, or/and the Metrolink Max idea.
Considering the cost and difficulty for electrifying the Caltrain corridor, I just don't see Metrolink electrifying soon. Caltrain has dramatically higher ridership that's quickly growing (60k average daily, compared to 11k for the busiest Metrolink line) and even then, electrification isn't remotely possible without HSR funding.

IMO, if/when HSR goes to Anaheim is the best shot for Metrolink to start electrification. As an aside, does Metrolink own any of the track it operates on? The only way Caltrain can electrify its main corridor is because it actually owns the ROW.
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Old August 26th, 2016, 06:08 PM   #2300
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Light rail should be operated on narrow-gauge ROW.

Otherwise, it doesn't seem like light rail...
"We should limit the functionality and practicality by adhering to the self-imposed limits and list of characteristics we put on the ambiguous label."

This exact thinking is why many Americans rarely think outside of the box nowadays. "Light rail" with too wide a tunnel? "Streetcars" on their own right of way? Impossible! .. eventhough it used to be done all the time, and the rest of the world still does. Who cares if something falls in between two self-invented categories? As long as it is fit for the job.

To be honest, in a region like LA's you should be happy the light rail system has some aspects of a metro, considering the size and importance of the region.
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