I'm not a civil engineer, but I have been in the archictural end of the construction business since the 1980's, even did a stint as a building inspector, so I've been around the block a few times with building codes, ADA laws, DOT regulations, legal liabilities, on and on, so I can see the potential shortcomings and liabilites with this proposal as stated.
I can see potential as a standalone urban people mover, where the tracks are elevated above walkways and roadways. It could be accessable from the buildings served and with elevated tracks, you get in, enter your destination and the cars could go alond a route thru a city grid switching at intersections and dropping people off at the specified stop, there is potential here, but as a replacement for the personal automobile, it simply isnt gonna happen, remember the trolleys were going to be the end all transit system that would replace the horse and buggy, it didnt happen, simply because people still preferred the horse and buggy that allowed greater mobility, trolleys found there nitch in the commuter sevice. It took the automobile to replace the horse and buggy entirely all they did was remove the horse from the equation with a smelly gas motor bolted under the buggy. We've been driving the "horseless buggy" ever since.
Even in the future, the car will be with us in one form or another until they invent instant transporter booths on every corner on every city on every nation, even then some kind of car device will still be used to get to the places outside of the transporter booths. Even if we in the end the cars we are driving are solar powered, or those compressed air powered Indian cars, or pedal powered jitney's, the "car" persay will always be with us. the freedom of movement the car allows is too great a motivator to ever go away.
If you want to see an example of what I'm describing for urban use, rent "Minority Report" which features a much higher tech version of these tranporter trains, namely the mag-lev people movers depicted in the film, you get in, state your destination, the car then moves out onto a continous mag-lev plate, which BTW is seperated from pedestrian and road routes, computers control the speed and slotting of the cars which move across the plate depending on their ultimate desitination, even moving up and down the sides of buildings to get the passengers to their destinations...but even in Minority Report, there were STILL cars...check out the Lexus depicted in the movie. Sweet!
All I'm saying is that there are a great deal of real world issues that need to be delt with, some of which I'm afraid to say are going to be deal killers as designed, seriously, this need more thought as to how it would work in the real, very code regulated, and very prone to lawsuites, world.