All these plans are doomed to failure. These are mass transit systems designed to be more convenient to people. However, I don't think people were spending $40,

All these plans are doomed to failure. These are mass transit systems designed to be more convenient to people. However, I don't think people were spending $40,000 on an SUV out of needing convenience. People will want their own vehicle, not many people will be willing to give up their sports cars or their trucks and SUV's to switch to a smart car look-a-like that you don't even own. The other problem with these systems, even if they do develop a way to beat the whole 'wanting your own car' problem. What happens when you want to go to a different country? I mean quite honestly, this system will never work in Europe as anything more than an alternative to buses. The systems need to be universally accessible, I need to be able to move from England to France to Spain and into Portugal without my vehicle losing control and driving me off the side of a bridge because Spain has a different system. There's the whole doorstep to station problem in PRT's, however thats only the first problem they've got. Allowing people to have their own vehicles (something that has to happen, there's too many vehicle companies that would need take out a PRT system to stay in business) would solve the doorstep to station, because the station is in your garage and thus negates the doorstep. However, then there's recognition between cities, I'm sure users and car manufacturers don't want vehicles doing a game of chicken when you drive onto another cities system, and the same happens between states and countries. What happens if California drove on the right and Nevada drove on the left? Someone would have to change their system. It's happened in lots of countries around the world, that one changed the side of the road they drove on because it just made it safer than trying to teach the 'stupid foreigners' they're in a different country with different rules.