Public Transportation and Smart Growth

The article doesn't break down the nature of the incidents at all before implying that the system is unsafe, and emphasizes the scariest (but very rare) incidents of people being pushed onto the tracks from platforms. Very likely the majority of deaths are suicides, not all of them at stations, and suicide is obviously a wider social problem which is not solved by platform edge doors. If those figures do include suicides they are actually surprisingly low - comparable to London Underground which is significantly smaller. The article is a bit sensationalist.

That said, platform doors are obviously a very good idea, especially at the busiest stations and those with narrow platforms. My local subway (Glasgow, Scotland) is getting half-height doors very soon, which will be a big benefit because it is a really old system with some very narrow island platforms.

London has some doors on its newest lines, and most underground stations have excavated pits between and alongside the rails in stations, so people falling onto the track tend to drop down into the pits and can avoid being hit by a train if they lie flat. Even more expensive and disruptive to do than platform edge doors, though.