This has, of course, been suggested about 37 billion times (judging from the blogs/forums I read...).<p>It's not a bad idea in the abstract, but it's also not a trivial and cheap project. The author's example of Japan leaves out the little fact that although it's used on some new lines, and is being retrofitted on some old ones, the <i>vast</i> majority of Japanese rail/subway lines do not use platform barriers, and it will certainly be many decades, if ever, before a significant number do.<p>Besides the obvious construction costs, to make platform barriers work you need very consistent door positioning, which is maybe not so hard for new systems, but is a much bigger problem for old systems like the NYC subway (with multiple types of running stock, etc).<p>NYC has the additional problem that it has <i>much</i> higher (up to an order of magnitude in some cases) construction costs for public works projects than most other countries.<p>On the positive, platform doors are not an "all or nothing" proposition ... they can be added line-by-line, or station-by-station, as soon as necessary conditions are in place.<p>Certainly it's not a bad idea to study for the future, but it's also certainly not a simple project to undertake, and even if started soon, it would be a long time before enough any significant portion of the system is protected.
<i>"On average 200 people lose their lives on the New York City subway, a year. Surely the cost of erecting these barriers is worth less than those souls lost."</i><p>This doesn't sound right. I live in NYC, and people getting killed by trains is generally a newsworthy event. It's not something that one hears about every couple of days, as would be the case if it happened to 200 people every year. Also, for the fraction of these deaths that are suicides (which probably far exceed the number of people being deliberately pushed), building barriers on the platforms will not save these people's lives, since there are many alternate ways of committing suicide.<p>The NYC subway has 468 stations[1], with the larger ones (e.g., Times Square) having a dozen or more platforms. Add to that the commuter rail lines (e.g., LIRR, PATH, Metro North) and you have even more (Penn Station and Grand Central are huge). It would probably cost billions of dollars to build gates on every platform. These billions of dollars could probably save many more than 200 lives a year if, for example, they were spent on improving the health of poor children in NYC. (But in any case, the city doesn't have billions of extra dollars lying around.)<p>[1] <a href="https://en.wikipedia.org/wiki/New_York_City_Subway" rel="nofollow">https://en.wikipedia.org/wiki/New_York_City_Subway</a>
Looking at the trains, they have no bumper and are sure to chew up anything in their path. Couldn't we design and build some kind of tough, inflatable bumper and install for a reasonable price?<p>Yes, you would get badly banged up (watch the 3rd rail!) but would probably stand a better chance. I'd also like to verify the average actual cause of death before fully backing this idea.
That reminds me of my surprise when I went to Taiwan and saw similar barriers in every metro station.
Even without crazy people, it's really nice to have when children are around.