My ultimate vision of sustainable mobility is two-fold.
First on the community side, I am looking for a mass transit system that not only works in urban areas, but also inter-city. Inner-city, urban areas, and suburbs could use various systems, ranging from an electric powered buses/trolleys/subway systems,and various other people pushers that we see today in various airports and urban areas. For inter-city, we have ultra-fast bullet, and mag-lev trains that make it affordable and convenient for all.
Secondly, I would tie in, and on an individual basis, electric personally owned vehicles. This can run the gamut of Segways, electric Smart cars, shuttle cars, bicycles, and also walking. And of course the infrastructure for all these electric vehicles need to be established throughout the country and world, along with the technological aspects of all this to get the best bang for the buck. This is such a massive project, but even the longest gets started by taking the first step. I will not see it in my lifetime, but our future as a planet depends on us doing something, and now is as good a time as any to get the ball rolling.And I would go with electricity as the fuel for all this, coming from various renewable sources. And there are many options in this area, but it will take a concerted effort from all members of our country, and the world. And it will take a huge investment in capital, and is a long-term project. But I see it as a matter of life or death for our planet.