And it's not just at stations. Four high school students committed suicide at the same crossing in Palo Alto in 2009, so a security guard was hired to patrol i

And it's not just at stations. Four high school students committed suicide at the same crossing in Palo Alto in 2009, so a security guard was hired to patrol it [1]. There is still a guard there today. [1] http://www.mercurynews.com/news/ci_13912677 http://www.mercurynews.com/news/ci_13912677