High speed trains and plugin hybrids

As America’s population grows, its cities will sprawl even more, but as long as the jobs remain centrally located people will have to commute further and further. This means that the advantage of plugin hybrids will be lost since people will have to drive further then the charge will take them. Without this advantage plugin hybrids will be marginalized, and never reach the economy of scale required to give them mass market appeal. This leaves high speed trains as the savior of the American commuter. I love the concept of trains, since it would be great to commute from northern New Mexico to San Diego every day to work. The issue is trains require people to get to and from the central locations were the train stops via other means. This might work in NYC, but in LA, Dallas, Atlanta, etc you need a car. I propose we combine the two concepts to create a drive on drive off train system for plugin hybrids. As long as plugin hybrids can conform to certain standards (wheelbase, height, charge adaptor, safety, etc), it would be possible for people to drive to the train station, and drive right on to the train. Get out and plug in their car so it could be “running” during the journey, then sit back and enjoy the ride while the car is charged by the train from the grid. At their destination they would drive off and go about their day with a full charge on their batteries. Then reverse the process to go home. The journey would cost more then charging their car at home and driving it in, but the range would be unlimited, there would be no traffic, and they could be productive like they were on public transportation, only without the issues associated with public transportation.
CA and the Northeast would be prefect test markets, and the trains could carry cars and people, so the risk would be low. If the system worked out, and the routes got longer it would be possible to use the batteries in the car to power the train for short periods of time. This would allow the train to run on tracks without overhead or third rail electrical power, and save weight by not having to carry large dedicated battery packs. With the virtual battery made up by the cars, these trains could actually become hybrid as well, since some of the energy normally lost to braking could be transfered to cars batteries (batteries that are payload, not dead weight.)