At 72nd Street on the Upper West Side, stranded travelers received an evolving series of messages. At one point, an announcement encouraged everyone to vacate the station and try hailing a cab, find a bus, or walk to another subway station. Then confused straphangers were told, "This 1 train isn't moving for the foreseeable future. Your best bet is to take the bus or the express train and double back." Minutes later, an announcement came that trains would be moving again soon, which they eventually did.
One commuter at 125th Street emailed to report that on her stalled train, the conductor announced that all power had been turned off at 14th Street due to an unauthorized person running on the tracks, and police were trying to catch them. The detailed announcement appears to be part of a new effort on behalf of the MTA to give straphangers more information about the cause of delays.
The MTA could not immediately confirm if the person shown in the video and photos was the same individual who caused the delays.
UPDATE: An NYPD spokesperson said the unidentified man was taken into custody and removed from the subway at the Christopher Street station. The man, who appeared to be uninjured, was taken to Bellevue Hospital for evaluation.
Additional reporting by Aidan Gardiner
If someone you know exhibits warning signs of suicide: do not leave the person alone; remove any firearms, alcohol, drugs or sharp objects that could be used in a suicide attempt; and call the U.S. National Suicide Prevention Lifeline at 800-273-TALK (8255) or take the person to an emergency room or seek help from a medical or mental health professional.
Source: http://gothamist.com/2017/08/10/person_on_subway_tracks.php
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This isn't really news. What is news is how often this is happening now. My question is what are some short-term answers to help combat this ongoing problem? I don't know if I support having those sliding doors installed on the tracks. I think it's too expensive to implement and will disrupt service too much. The 
has said that it is going to work diligently to reduce track fires that cause delays, but what are they doing to coordinate with the city to reduce the amount of unauthorized people walking or jumping onto the tracks? To me this says that we have a problem in that we have too many people walking around in general that either aren't on their medication or should be in an institution rather than on the streets, and this is something that the should be calling on the city to address. If they're going to reduce delays, then these issues have to be addressed.