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Why Don't North American Metro Systems Have Platform Screen Doors?

YOU are. Consistently. Shame on you.
Shame on you, what a karen, a big troll
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North American systems are old generation,and they evolved to ver time ..where as China and other recently developed countries did not have to though evolution.They on boarded directly into latest generation technologies. In US there is fiber optics laid down to every village few decades back ..but African countries skipped it and on 4G cell phones to have the level of phone service and with starlink optical fiber will be obsolete (May be?)

US SSA still runs on mainframes and software in cobol written in 1970s..
 
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North American systems are old generation,and they evolved to ver time ..where as China and other recently developed countries did not have to though evolution.They on boarded directly into latest generation technologies. In US there is fiber optics laid down to every village few decades back ..but African countries skipped it and on 4G cell phones to have the level of phone service and with starlink optical fiber will be obsolete (May be?)

US SSA still runs on mainframes and software in cobol written in 1970s..
China also has old metros, Beijing's first subway was built in the late 1960's during the Cultural Revolution, very simple, crude even primitive, but now they have all been retrofitted with screen doors.
 
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Who is trolling?

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Isolated hate crime incidents are not a cause. Even if there were barriers, the culprit would have found a different way to dispense their hate….
 
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Isolated hate crime incidents are not a cause. Even if there were barriers, the culprit would have found a different way to dispense their hate….
investigated the effectiveness of physical barrier installation in the prevention of incidents using an agent-based simulation model and found that installing physical barriers on subway platforms can effectively reduce 76% of passenger suicides.

 
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It's not just in North America. Let’s look at some subways in capital/major cities elsewhere:

Neither does the Moscow metro

Neither does the London tube

Neither does the Rome metro


Neither does the Madrid subway


Neither does the Berlin subway


Neither does the Athens subway
Its common to not have PSDs in old systems, even in India the old metro systems don't have PSDs but the ones that were built relatively recently have them.


Here's blue line of Delhi metro (without PSD since it was one of the first lines of DMRC)



Here's magenta line of Delhi metro (With PSD since it is one of the latest lines of DMRC)
 
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North American systems are old generation,and they evolved to ver time ..where as China and other recently developed countries did not have to though evolution.They on boarded directly into latest generation technologies. In US there is fiber optics laid down to every village few decades back ..but African countries skipped it and on 4G cell phones to have the level of phone service and with starlink optical fiber will be obsolete (May be?)

US SSA still runs on mainframes and software in cobol written in 1970s..

Updates to such facilities are made as and when needed by due process, that is all.
 
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Its common to not have PSDs in old systems, even in India the old metro systems don't have PSDs but the ones that were built relatively recently have them.
Newly built subways in US also don't have them

 
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investigated the effectiveness of physical barrier installation in the prevention of incidents using an agent-based simulation model and found that installing physical barriers on subway platforms can effectively reduce 76% of passenger suicides.



You are missing the point…

Earlier it was hate crime and now you are taking about people with suicidal tendencies.

There thousands of ways a person can commit suicide, installing barriers will not deter a person that’s hell bent on ending their life…
 
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You are missing the point…

Earlier it was hate crime and now you are taking about people with suicidal tendencies.

There thousands of ways a person can commit suicide, installing barriers will not deter a person that’s hell bent on ending their life…

Maybe that was the goal that made them essential in China?
 
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You are missing the point…

Earlier it was hate crime and now you are taking about people with suicidal tendencies.

There thousands of ways a person can commit suicide, installing barriers will not deter a person that’s hell bent on ending their life…
Many factors involved, not just one, and why countries still install them? Beijing's subways used to not have them.

v2-d204ab32671d43221791945929169f8f_720w.jpg


Beijing subway in the 1990's
 
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Maybe that was the goal that made them essential in China?

Many factors involved, not just one, and why countries still install them? Beijing's subways used to not have them.

v2-d204ab32671d43221791945929169f8f_720w.jpg


Beijing subway in the 1990's

What makes sense for China and other countries doesn’t need to make sense for the US…

The US, a country where suing people and agencies is but a hobby, this would have been a fat cow to milk, but isn’t.

Give me a real tangible reason and I’ll shut up.
 
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found that installing physical barriers on subway platforms can effectively reduce 76% of passenger suicides.


Some of your barriers are just gates at chest level. If you were installing them to prevent suicides why didn't you put them all the way up?

As I brought up before it seems the ones that are floor to ceiling in underground subways are mostly for temperature control. in places where that is not important it can be just a gate.
 
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