The value in double deck equipment is a cost saving in maintenance. One pair of trucks (which is what drives maintenance costs) provides approximately 50% more capacity. Since maintaining equipment is the largest single category of expense that is powerful. (Combined with depreciation we can be talking about 40% of total operating costs). So all things being equal, one would expect single level equipment to bring a significant rise in operating costs.
Of course not all things are equal.
In regards to that 60% occupancy, that doesn't meant the car is not 100% occupied at points along the journey, it is just that the jigsaw puzzle of many stations means it is hard to get tmuch past 60% for a fully occupied long distance car.
Of course not all things are equal.
In regards to that 60% occupancy, that doesn't meant the car is not 100% occupied at points along the journey, it is just that the jigsaw puzzle of many stations means it is hard to get tmuch past 60% for a fully occupied long distance car.