ALL consolidated SMRT/NEL/KT.. simisai BREAKDOWNS here!

[Mustank]

http://www.channelnewsasia.com/news/singapore/circle-line-wireless-signal-interference-due-to-faulty-hardware/3279060.html

 

Circle Line wireless signal interference due to faulty hardware on a single train

An intermittent failure of the signalling hardware on one train, Passenger Vehicle 46 (PV46), was identified as the cause of the wireless signal interference in November, with a "strong likelihood" that it was also the cause of September's disruptions, LTA and SMRT say.

 

SINGAPORE: The findings on the cause of the wireless signal interference on the Circle Line were released on Friday (Nov 11), with the intermittent failure of the signalling hardware on one passenger train identified as the cause.

 

According to the Land Transport Authority (LTA) and SMRT, the intermittent hardware failure between Nov 2 and Nov 6 caused about 100 occurrences of loss of signalling communications on trains travelling in the proximity of Passenger Vehicle 46 (PV46).

 

"The loss of communications on these trains resulted in their emergency brakes being automatically activated, which is a safety feature," both parties said in a press release.

 

The joint team of LTA, SMRT, signalling system manufacture Alstom, the Infocomm Media Development Authority (IMDA), the Defence Science and Technology Agency, DSO National Laboratories, the Government Technology Agency (GovTech) and electro-magnetic interference specialist Rohde & Schwarz had spent several weeks investigating the incidents.

 

Ongoing investigations also indicate a "strong likelihood: that PV46 was the cause for the about 200 occurrences of loss of signalling communications on Circle Line trains between Aug 28 and Sep 2, they added.

 

TELECOMMUNICATION SIGNALS NOT THE SOURCE

 

LTA and SMRT also noted that an initial hypothesis was that interference from telecommunication signals may have caused the repeated activation of the trains' emergency brakes.

 

To test this, LTA, IMDA and the three telcos suspended mobile telecom services across the entire line for two hours on Nov 3, and then for a full day on Nov 4. "These tests showed that telecommunication signals were not the source of the interference," LTA and SMRT said.

 

Earlier, Transport Minister Khaw Boon Wan said the Circle Line disruption is "interesting" and has been challenging for his team, which had to eliminate possible sources for the signal disruption one by one.

 

Intermittent signal interference caused disruption and multiple delays on the Circle Line for nearly three hours on Nov 2, which resulted in mobile signals being shut off temporarily over the following two days.

 

The same signal interference problem dogged the line for five consecutive days in September.

Whoa!!!!

[Wyfitms]

Its called a "photo op"

 

Its like queuing up for a char kway teow

 

and suddenly he is a common man and one of us.

 

They need to use the trains every day to focus

 

their minds on the problems at hand.

 

Reading reports is every different to being delayed

 

for work every other day and experiencing the problems

 

first hand.

 

Cabinet meeting starts late again due to members

 

being on delayed trains. This will sharpen the focus

 

to solve this once and for all.

 

Transportation is only a small agenda

The ministers have bigger problems to worry such as how to grow GDP

Being late for cabinet meeting could cost Singapore billions of dollars

We have to look at the bigger picture and consider the greater good

[Kb27]

Instead of blaming everybody else for signal interference, now they found it's their own problem.

[Mason016]

Instead of blaming everybody else for signal interference, now they found it's their own problem.

 

 

[Mustank]

Dsta for the win!!!!!!

http://www.straitstimes.com/singapore/transport/mystery-of-circle-lines-signalling-woes-solved-train-with-faulty-signalling

The Straits Times understands engineers at the Defence Science and Technology Agency helped to crack the mystery of the signalling fault that caused train service on the Circle Line to be disrupted.

Later I go see whether can mrt from taobao

[13177]

Instead of blaming everybody else for signal interference, now they found it's their own problem.

Confirmed they have found the root cause of the problem? Wait they thought this is the problem but later breakdown again, and dont know what trigger the problem?

[Mustank]

Confirmed they have found the root cause of the problem? Wait they thought this is the problem but later breakdown again, and dont know what trigger the problem?

Wait for 7 7 49 days then we will know

[Still2016]

http://www.channelnewsasia.com/news/singapore/circle-line-wireless-signal-interference-due-to-faulty-hardware/3279060.html

 

Circle Line wireless signal interference due to faulty hardware on a single train

An intermittent failure of the signalling hardware on one train, Passenger Vehicle 46 (PV46), was identified as the cause of the wireless signal interference in November, with a "strong likelihood" that it was also the cause of September's disruptions, LTA and SMRT say.

 

SINGAPORE: The findings on the cause of the wireless signal interference on the Circle Line were released on Friday (Nov 11), with the intermittent failure of the signalling hardware on one passenger train identified as the cause.

 

According to the Land Transport Authority (LTA) and SMRT, the intermittent hardware failure between Nov 2 and Nov 6 caused about 100 occurrences of loss of signalling communications on trains travelling in the proximity of Passenger Vehicle 46 (PV46).

 

"The loss of communications on these trains resulted in their emergency brakes being automatically activated, which is a safety feature," both parties said in a press release.

 

The joint team of LTA, SMRT, signalling system manufacture Alstom, the Infocomm Media Development Authority (IMDA), the Defence Science and Technology Agency, DSO National Laboratories, the Government Technology Agency (GovTech) and electro-magnetic interference specialist Rohde & Schwarz had spent several weeks investigating the incidents.

 

Ongoing investigations also indicate a "strong likelihood: that PV46 was the cause for the about 200 occurrences of loss of signalling communications on Circle Line trains between Aug 28 and Sep 2, they added.

 

TELECOMMUNICATION SIGNALS NOT THE SOURCE

 

LTA and SMRT also noted that an initial hypothesis was that interference from telecommunication signals may have caused the repeated activation of the trains' emergency brakes.

 

To test this, LTA, IMDA and the three telcos suspended mobile telecom services across the entire line for two hours on Nov 3, and then for a full day on Nov 4. "These tests showed that telecommunication signals were not the source of the interference," LTA and SMRT said.

 

Earlier, Transport Minister Khaw Boon Wan said the Circle Line disruption is "interesting" and has been challenging for his team, which had to eliminate possible sources for the signal disruption one by one.

 

Intermittent signal interference caused disruption and multiple delays on the Circle Line for nearly three hours on Nov 2, which resulted in mobile signals being shut off temporarily over the following two days.

 

The same signal interference problem dogged the line for five consecutive days in September.

Funny if we were to analyze their problem solving algorithm.

 

They identified 3 possibilities

1. Telco

2. Prior minor software tweet

3. Passenger carriage

 

 

Instead of exploring the least disruptive possibility of checking the carriage they use Jack hammer to check Telco Signal.

 

There are older Train systems in the world more subsceptible to Telco system but non reported on world news before. Maybe the fondness of wanting to be no 1 again made them decide to explore this possibility First

 

They are still not 100% sure with a caveat of strong likelihood.

 

They must stop thinking we are transparent

.

 

Have anybody thought of the lost of productivity from multiple breakdown of trains?

 

Authorities keep asking for better productivity.When not obeying import cheap labour and reduce salary and make 1 person do 2 persons job.

 

In short, we need to work together as a team.

[Ken138]

Problems solved.. pat themselves on back & get performance bonus !! :)

Anyone ponder what really went wrong in the diagnosis & troubleshooting ? :)

[Ktglfc]

How to cope the congestion when most of the new satellite towns main roads are only 2 lanes ...

 

How those Transport Consultants does their homework & planning is yet to be seen ????

 

When comes to a junctions at the new towns (Bukit Panjang inclusive), right lane can go straight and also turn right. Left lane can also go straight and turn left. So vehicles slow down at both right & left turn to give way to pedestrains & cyclists. Those those vehicles going straight will have to wait for it to clear and as such, why no congestion ...  . During peak periods are nightmares ....

 

 

Less roads = car-lite

Instead of blaming everybody else for signal interference, now they found it's their own problem.

 

 

Its not their problem ... its the train problem

They won't blame themselves ... they will blame on the train ... so take it off ... and strip it

[Sosaria]

Funny if we were to analyze their problem solving algorithm.

 

They identified 3 possibilities

1. Telco

2. Prior minor software tweet

3. Passenger carriage

 

 

Instead of exploring the least disruptive possibility of checking the carriage they use Jack hammer to check Telco Signal.

 

There are older Train systems in the world more subsceptible to Telco system but non reported on world news before. Maybe the fondness of wanting to be no 1 again made them decide to explore this possibility First

 

They are still not 100% sure with a caveat of strong likelihood.

 

They must stop thinking we are transparent

.

 

Have anybody thought of the lost of productivity from multiple breakdown of trains?

 

Authorities keep asking for better productivity.When not obeying import cheap labour and reduce salary and make 1 person do 2 persons job.

 

In short, we need to work together as a team.

They troubleshoot that way becos they can. LTA + SMRT is not like any other privatised corporation ... got connections one ok?

 

Likewise the telco also connected. It's actually a simple matter to get the telco to halt their signals for any amount of time. No issue, all in the family!

 

Can even rope in dsta engineers to help them troubleshoot ... wah lao, looks like some huge matter concerning the nation is at stake. I can understand why, the credibility of the multi million dollar men is the most important thing to salvage. Pull out all stops, mobilize all national resources.

Edited November 11, 2016 by Sosaria

[Jamesc]

Isn't that the first place they should have checked?

 

[Yewheng]

Confirmed they have found the root cause of the problem? Wait they thought this is the problem but later breakdown again, and dont know what trigger the problem?

Okay, this signalling root cause of problem is found, thanks to dsta and others. No thanks to smrt. Smrt are just super clueless.

 

Now they need to do is to find the root cause of problem for track fault. I can guarantee that the track fault got nothing to do with the wooden sleeper track that they thought is the causes and ramping up to replace with concrete one. As track fault still occurs till date. Smrt ar... Si bei clueless.. Haiz..

 

So this track fault need which expert to find the root cause? Cannot be dsta right? They are not expert in that field. How sia? We need more of those good expert like dsta engineer and not those know nothing about their stuff and anyhow pin point the problem.

 

We are in mercy of these management and engineers. Not only they can't find the root cause of the track fault, they anyhow pin point to need to replace wooden sleeper to concrete one ( which makes no sense as how come only sg so unique, all other countries using wooden one no issue). Then it causes a lot of inconvenience and wasted resources at the expense of commuters money.

 

BTW, wooden sleeper can absorb vibration a lot better then concrete one, don't know whether the vibration will become an issue many years down the road too..

Edited November 11, 2016 by Yewheng

[Kopites]

All such investigations and tests how much it will cost the commuter eventually? That is a very important question.

[Yewheng]

All such investigations and tests how much it will cost the commuter eventually? That is a very important question.

This is surely a lot less expensive than the 5 yrs problem with track fault that they seems clueless and still never admit that they haven't found the root cause of problem. They already spend money replacing wooden sleeper with concrete one, that a lot of money.

 

There are some items that are built that way with the certain material. If we change the material to a completely different property, it must at least put through scientific research and not because they feel it's better, they feel it is stronger and decided to go ahead and change. It's not the way it works. Sometimes they may get away with it while other times things may get worst.

 

The wooden sleeper in the tracks had been on tracks been donkey of years since early 1900s.. So it's more then 100 years history that the train track had been using the wooden sleeper. All these while so many other tracks that are longer in service then our current mrt track and have no problems. So what makes them think that it is the wooden sleeper problem? It seems like that like to anyhow hamtam and give reasons why changing to concrete would solve the track problem. Olden train are all made of metal and they all are super heavy, wooden sleeper still able to take the load with no problem.

 

If let's say the team had done extensive research and found that concrete sleeper is better then wooden one then fine. I really mean extensive research.. Those research will take a few years, did smrt go through that process before deciding that concrete sleeper is better then wooden one?

 

Differences between wood vs concrete.

 

wood:

More flexible

Absorb vibration better

Absorb more water.

 

Concrete:

Super hard

Does not adsorb vibration well

Does not absorb water well.

 

See both are totally different properties of compound.. Will that cause more issue in long run? No one knows..

Edited November 11, 2016 by Yewheng

[Mustank]

There is a very strong metal that can withstand damanage and zoom the vibration

[13177]

Okay, this signalling root cause of problem is found, thanks to dsta and others. No thanks to smrt. Smrt are just super clueless.

 

Now they need to do is to find the root cause of problem for track fault. I can guarantee that the track fault got nothing to do with the wooden sleeper track that they thought is the causes and ramping up to replace with concrete one. As track fault still occurs till date. Smrt ar... Si bei clueless.. Haiz..

 

So this track fault need which expert to find the root cause? Cannot be dsta right? They are not expert in that field. How sia? We need more of those good expert like dsta engineer and not those know nothing about their stuff and anyhow pin point the problem.

 

We are in mercy of these management and engineers. Not only they can't find the root cause of the track fault, they anyhow pin point to need to replace wooden sleeper to concrete one ( which makes no sense as how come only sg so unique, all other countries using wooden one no issue). Then it causes a lot of inconvenience and wasted resources at the expense of commuters money.

 

BTW, wooden sleeper can absorb vibration a lot better then concrete one, don't know whether the vibration will become an issue many years down the road too..

Like i said before, they always like to solve a problem with another potential problem. As they doesnt know what they are doing also.

[Blueray]

There is a very strong metal that can withstand damanage and zoom the vibration

I thought this give to Captain America already ?