I'm not sure of the degree to which you would like to look forward 10 to 20 years to quote new technologies, but there have certainly been some studies that have looked at intermodal relationships and how everything gets put together and what should happen.
Most of the work that gets done argues very strongly for the following kinds of relationships on the passenger side. In the major urban centres, you need a good, viable, efficient combination of light rail and bus urban transportation system. That needs to be closely linked into major nodes in the major urban centres for rail, air, and bus. And you need to make sure that if you're going to a high-speed system--this is quite routine now in places like Europe--your high-speed system ties directly into those major nodes, directly into the major airports, directly into the major train stations, and those train stations link directly into the subway systems and the bus systems and what not.
With regard to private passenger travel, there are a number of studies that are looking now at what's called intelligent transportation systems or intelligent highway systems, and they're all focusing on what we can do better in two contexts. What can we do better to increase the capacity of the existing system? In other words, allow private vehicles to travel closer to each other and ideally at higher speeds, but how can we do that and at the same time significantly improve the safety margins? There are a number of studies going on today that essentially would have.... Frankly, you would not be in control of your car. Some computer system would be.