I always get a kick when our European cousins bring up the idea of cheap public transportation. In Europe, It can work. Here in the US. Not so much. I would like to see a major discussion about this topic. The pro's and the con's. I live in California, USA and the first major issue I see is earthquakes. We have a few from time to time. Also, the other major challenge we have is land mass. Things are much farther apart. Maybe at a city level this might work. Most EU countries are about the size of our cities, so that is a feasibility. What do others think on this matter? Is a cheap public transportation system possible that doesn't require armed guards at most stops, say, in downtown L.A.?