Can anyone have an idea how this works? I was told to purchase pass then call the car rental to reserve the car, but I don't know the ditails, any advise will be greatly appreciated. Thx
Did you look on this site? Might start here: http://www.ricksteves.com/rail/raildrivecar.htm
Or here: http://www.raileurope.com/us/rail/rail_drive/index.htm
That's how they work.