Sir_schwick: I understand your idea with capacities. I have some questions though:
a) capacity works only inside your borders?
b) is capacity for units unlimited?
c) would roads and rr`s work the same way as they do now (no interruption of movement when going from rr to road or from road to normal tile)?
d) capacity generates gold always or only when trading goods?
Sorry, but somehow I don`t imagine how would your system work. Guess I`m just dumb or sometin`. Maybe it`s because your system is so different from existing one.
Well, I think movement needs to be improved, capacity is suppose to take care of trade, road and railroad issue, so it sounds kind of appealing.
It is kinda radical departure from current systems.
a) Obviously for trade purposes, no. You can use your 'logistical' capacity for some operations outside your territory. It might be a neat rule that it takes one turn to modify rail/locomotives for newly occupied rails, or some variation in order to use.
b) Each unit uses one capacity points, but more on points below.
c) That is a good question and I would assume the answer is that using multiple mediums requires multiple transport modes.
d) This gets kinda complicated, but it automated. There would need to be an underlying economy based on materials -> products that are sold and possibly turned into more products. Materails can be common or luxury, whatever is around. In order for this trade to occur, it must rely on tremendous logistical support. In exchange for the trade, you earn commerce arrows. Like commerce earned from tiles, it gets turned into Gold/Research/Happiness according to your tax ratios. In fact the commerce is simply added to the home cities commerce.
Logistical Points:
Roads/RR/Airports and other infrastructural features only exist to allow use of transportation. Without cars roads are just long stretches of asphalt. This 'logistical reserve' is built in incrememnts in cities like any other unit. However instead of forming a tangible unit, it goes into a pool. There is a pool for ground, rail, water, and air. These numbers would be expressed on the side of the screen (Points Avaliable/Total Points). Of course how they are expressed could change, but it would be easy to tell. You also pay a cost for the amount of logistical support you have, even if it is not all used. Hopefully trade will well make up for this though.