I lost quite a bit of interest when that article said rail and cars have the same environmental footprint, both being less than aviation, with that statement high speed buses is what we need, thousands of them. Again they like to imagine cars travelling around like bubbles, not like a plane spreading nasty contrails and needing huge runways and trains cutting through forests and tunneling and destroying the landscape. No one seems to mention the millions of Kms of tar-sealed roads and the impact they have on the environment, let alone the cost of the roads, bridges street lights and traffic lights and the annual ever increasing budget to maintain such assets. Imagine what the electrical consumption of the road system in Melbourne or Sydney is and how that translate to coal burnt and cost to the community, that's before you take into account the actual car emissions, road emissions and a myriad of other nasty things.