While I agree that more both north-south and east-west transit lines are needed, the geography of the area makes subways prohibitively expensive. The soils in the area are expandable soils, and run deep. Any subway tunnels would have to be dug much deeper than is typical, down to a depth of year-round consistent humidity and temperature, so not to be destroyed by seasonal soil shifts.
An elevated line would be more feasible (and is indeed in place for some portions of the existing rail lines), but again, you still have to sink your supporting piles deep due to the soil, and that raises the costs. This is why the existing rail transit in the metro area largely follows rail corridors that existed beforehand.
Finally, botched project management has eroded public will to support more rail lines.
I want more transit rail too, but getting it is going to be an uphill battle.
An elevated line would be more feasible (and is indeed in place for some portions of the existing rail lines), but again, you still have to sink your supporting piles deep due to the soil, and that raises the costs. This is why the existing rail transit in the metro area largely follows rail corridors that existed beforehand.
Finally, botched project management has eroded public will to support more rail lines.
I want more transit rail too, but getting it is going to be an uphill battle.