As far as I know there are no security guards at the different stops its like a bus stop so what is going to stop somebody with an explosive vest boarding the train and blowing himself up? On the regular trains there are guards at the stations and you get your bags searched before you go in but in Jerusalem there will be no security. One suicide bomb on a peak time train could produce casualties in the hundreds so whats happening as far as security goes on this thing? I think there is a real possibility we will start seeing some suicide bombers again before the end of the year if the arabs go to the UN in September so security is something that we need to take seriously.
from the article: Jerusalem's little train that almost could