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Old November 25th, 2008, 03:36 AM   #361
LoverOfDubai
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Bus lane to connect Sharjah and Dubai
By Mariam M. Al Serkal, Staff Reporter
24 November 2008, 23:35

Sharjah: A dedicated bus lane will soon be set up between Sharjah and Dubai in order to relieve motorists from the daily traffic congestion.

"A special committee has already been formed to implement the plan, and we are finalising the details," said a senior official at Sharjah Transport Authority.

The announcement was made on the sidelines of the three-day Sharjah Urban Planning Symposium (SUPS) that ends today.

The first phase of implementing the bus lane will be in three areas on the Sharjah/Dubai border: Al Taawun Road, Al Ittihad Road and Emirates Road.

Faster commuting

There are currently two inter-emirate bus routes that transport passengers from Dubai to Sharjah. Passengers can either get a bus from Al Ghubaiba station at Bur Dubai or the station at Deira, which leaves passengers at the main bus station near the Sharjah Fish Market.

"By improving the services of the public transport system, commuters will then have an incentive to use the inter-emirate buses because they will get to their destination faster than using their own vehicles," the transport official said.

"Ultimately, the motorists will also benefit because the buses will not add to the traffic congestion."


The launch of the bus lane will be headed by the Sharjah Transport Authority and the Roads and Transport Authority in Dubai, in collaboration with the Sharjah Directorate of Town Planning and the Directorate of Public Works.

Mirroring city growth

The public transport system must be aligned with the growth of the city for it to work successfully, said an academic yesterday at the Sharjah Urban Planning Symposium.

"There is an urgent need to develop an effective system in Dubai that will help in achieving lower expenses, simplified procedures, improved safety and increased efficiency," said Dr Akmal Abdul Fatah, Assistant Professor of Civil Engineering at the American University of Sharjah.

Abdul Fatah presented a research paper titled, "Factors Affecting the Service Performance of Public Buses in Dubai," which pointed out the problems affecting passengers. A methodology was developed to identify the significant factors affecting the bus system.

During his presentation, he explained that the journey time of the buses was affected by lack of punctuality and information found at bus stops.
http://archive.gulfnews.com/articles.../10262381.html
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Old November 28th, 2008, 02:55 PM   #362
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Update of the progress on some of the stations from November 23rd


Al Karama Station
[IMG]http://i34.************/1zo7zo3.jpg[/IMG]


Trade Center Station
[IMG]http://i35.************/2mqiyy8.jpg[/IMG]


Emirates Towers Station
[IMG]http://i33.************/1c290.jpg[/IMG]


DIFC Station
[IMG]http://i34.************/160alw3.jpg[/IMG]


Burj Dubai Station (partial view)

[IMG]http://i34.************/2ur5im8.jpg[/IMG]


Bussines Bay Station
[IMG]http://i38.************/22ge81.jpg[/IMG]


Red Line Emerging from below ground (just past Burjuman station)
[IMG]http://i36.************/vztq38.jpg[/IMG]
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Old November 28th, 2008, 02:57 PM   #363
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Has to be said that most of the other stations on Red Line further down, are in more advanced status with one of them almost fully completed and already tested the functionality.
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Old November 28th, 2008, 06:16 PM   #364
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Why is the station on a "bump"?

[img]http://i33.************/1c290.jpg[/img]
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Old November 28th, 2008, 08:55 PM   #365
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Quote:
Originally Posted by RawLee View Post
Why is the station on a "bump"?
Most subway and good planed systems use the bumps to slow down the train and conserve the brake pads, the other side is a dip to help accelerate the train without using full motor power.

Its very green and zen....
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Old November 28th, 2008, 10:28 PM   #366
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clever idea,never thought about it this way.....thanks for the logic......
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Old November 29th, 2008, 12:04 AM   #367
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Most subway and good planed systems use the bumps to slow down the train and conserve the brake pads, the other side is a dip to help accelerate the train without using full motor power.

Its very green and zen....
Interesting. And expensive. I'd buy vehicles that feed back electricity.
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Old November 29th, 2008, 04:32 AM   #368
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Interesting. And expensive. I'd buy vehicles that feed back electricity.
Ummm......... while that works in theory... its cheaper in the long run to raise the track 5 inches rather then replace the brushes in the motor every week.
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Old November 29th, 2008, 04:29 PM   #369
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Ummm......... while that works in theory... its cheaper in the long run to raise the track 5 inches rather then replace the brushes in the motor every week.
Those brushes then must be of very-very poor quality...BTW,what brushes are we talking about in case of electric motors? I thought electromagnetic field accelerates/decelerates the vehicles...

Last edited by RawLee; November 29th, 2008 at 04:34 PM.
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Old November 29th, 2008, 10:09 PM   #370
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I'm no expert but I don't think that's the case (can be totally wrong though)
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Old December 3rd, 2008, 09:38 AM   #371
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I'm no expert but I don't think that's the case (can be totally wrong though)
The trains do regenerate. But the maximum deceleration / acceleration that can be safely achieved because of the limits of friction between the wheel and rail is not improved by using regeneration. So the train can decelerate faster and accelerate faster if the station is on a hump.

There might also be a need for clearances underneath the station, since they need to fit a concourse level in the station below the platform level, and they may want to make this clear of traffic below.

RSE

... they're brushless motors, as well.

Last edited by ARailSystemsEngineer; December 3rd, 2008 at 09:39 AM. Reason: and another thing...
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Old January 6th, 2009, 09:48 AM   #372
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thats a mistake, the $20 billions is for the whole Burj Dubai downtown project and not only the tram.
Yes indeed! A $20 billion tram line would be something to see - luxury leather seats with massage and the like! Perhaps, one day in Dubai.
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Old January 7th, 2009, 10:50 PM   #373
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RSE

... they're brushless motors, as well.
Well **** me and call me shirley, i didnt think they made brushless motors with the torque to get a train like that moving. Or am i completly not following this right and its LIM powered in which case yeah its brushless
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Old January 7th, 2009, 10:58 PM   #374
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Quote:
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Those brushes then must be of very-very poor quality...BTW,what brushes are we talking about in case of electric motors? I thought electromagnetic field accelerates/decelerates the vehicles...
Welcome to Electronics 101. In an electric motor there are stationary magnets attached to the side and 2, 4 or 6 magnets attached to the side of the motor housing. The inside, attached to the axel is a corresponding number of copper/steel wire winds (my CO would kill me for not remembering what those are called right now). Electrical power of either + or - is applyed to these wire bundles giving them either a + or - charge, thus attracting it to the magnet ahead and repelling it from the motor it is near. When it gets tot he new magnet the charge reverses and it is attracted to the next magnet and repelled from the current magnet. Thus the motor spins. The Brush is what transfers the power from the leads (electrical cables running to/from the motor) to the Wire Bundles. The problem with the brushes is they can wear out. If too much current is put through the brushes or the motor is constantly changing direction, you can put alot of wear and tear on the motor brushes. They are normally fairly easy to change, but its still a hassle.

That concludes Electronics 101- basic electrical motor design.
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Old January 8th, 2009, 03:48 AM   #375
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Welcome to Electronics 101....The Brush is what transfers the power from the leads (electrical cables running to/from the motor) to the Wire Bundles. The problem with the brushes is they can wear out. If too much current is put through the brushes or the motor is constantly changing direction, you can put alot of wear and tear on the motor brushes. They are normally fairly easy to change, but its still a hassle.

That concludes Electronics 101- basic electrical motor design.
In the next lesson, he will explain that modern rail vehicles use brushless 3-phase "squirrel cage" motors that achieve higher reliability by eliminating the brushes, and relying on induced currents in the motor, and a rotating electromagnetic field generated in the fixed coils of the stationary part of the motor. Variable speed ac squirrel cage motors were made possible by the availability of high-power semiconductors, and digital signal processing, so that variable voltage variable frequency inverters could be built to drive the rotating electromagnetic field.

Rse
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Old January 8th, 2009, 08:22 AM   #376
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Can somebody from Dubai send not only me but all of us photos of those freshed shiped modern buses like the Solaris Urbino, and Neoplan Centroliner?
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Old February 10th, 2009, 07:10 PM   #377
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Driving in SZR (Sheik Zayed Road) alongside the elevated track of Dubai Metro's Red Line (around 30 kms)

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Old February 10th, 2009, 07:12 PM   #378
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Posted earlier in the UAE section

[IMG]http://i42.************/2dwfh1z.jpg[/IMG]

[IMG]http://i40.************/zu5m6a.jpg[/IMG]
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Old February 10th, 2009, 07:15 PM   #379
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The Palm Jumeirah Monorail (open for public in April)


Courtesy of NAKHEEL
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Old February 12th, 2009, 05:23 AM   #380
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Awesome.
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