Just one thing: It failed to mention that those extra pane w/ doors on the metro platform also help safety. People falling on the metro line (intentionally or

Just one thing: It failed to mention that those extra pane w/ doors on the metro platform also help safety. People falling on the metro line (intentionally or not) is a real issue, and, aside from the obvious immediate consequence to the body integrity of the person that fell, it also yield a significant cost. It is become increasingly common to put those type of protective pane even on non automated metro lines. I saw them in Paris and Barcelona for example.