You can avoid maintainance cost issues by making it time prohibitive to build criss-crossing railroads every which-way. If a railroad is changed from being just on a tile to connecting two tiles (Enigma Nova's idea), then it would take 20 turns to cover a 3 by 3 area instead of 9 turns.
This wouldn't be hard to implement either, when you decide to build a RR or road by pressing "R" then it asks for the square to build it to. Once it is built you get the road bonus whenever traveling from the one square to the other.
I don't favor having maintainance costs on roads and railroads just because it would probably be pretty annoying, and how are they supposed to handle it when you don't want to pay any more? Do you get to pick what roads and railroads you aren't going to fund and what ones you will? I don't see a good interface for that problem.
I think a simple bonus when cities are connected combined with the non-infinite movement bonus is enough to justify building roads and railroads. No bonus resources from a tile though, and no maintainence costs either. As I have also said before, standard tile improvements should give a small movement bonus when moving between them. If you are going from an irrigated to an irrigated square, for instance, then you should get a 2 for 1 movement bonus, which later improves (as long as roads improve with the automobile). This would help decrease the need for roads and railroads everywhere too, since you won't be sacrificing a lot of mobility.
-Drachasor
This wouldn't be hard to implement either, when you decide to build a RR or road by pressing "R" then it asks for the square to build it to. Once it is built you get the road bonus whenever traveling from the one square to the other.
I don't favor having maintainance costs on roads and railroads just because it would probably be pretty annoying, and how are they supposed to handle it when you don't want to pay any more? Do you get to pick what roads and railroads you aren't going to fund and what ones you will? I don't see a good interface for that problem.
I think a simple bonus when cities are connected combined with the non-infinite movement bonus is enough to justify building roads and railroads. No bonus resources from a tile though, and no maintainence costs either. As I have also said before, standard tile improvements should give a small movement bonus when moving between them. If you are going from an irrigated to an irrigated square, for instance, then you should get a 2 for 1 movement bonus, which later improves (as long as roads improve with the automobile). This would help decrease the need for roads and railroads everywhere too, since you won't be sacrificing a lot of mobility.
-Drachasor
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