There's gonna be a market, alright.
- Jake If you only spend 20 minutes of the rest of your life on economics, go spend them here.
And I doubt that the personal automobil is going extinct anyhow. You can use internal combustion machines with hydrogenium (synthesized e.g. from water with wind or nuclear energy), biodiesel, natural gas, ... and you can have cars based on compressed air and electric cars (again with plenty of possible renewable sources). I simply can't see the terrible energy scarcity, that would be required to end the car.
For sure people will drive less, and the average weight of the cars will be reduced. But that isn't the end of the car. Der Amerikaner ist die Orchidee unter den MenschenVolker Pispers
Of course, your milage may vary (pun sorta intended) with your local gasoline tariff structure and rail ticket prices.