How wide is the radius your city can work?

[Superspank]

I have heard of 36 tiles. Is this three tiles in any horizontal or diagonal direction, i.e. where hexes sides fit together? How far can your work vertically?

Also, how much do roads cost to maintain?

 

[zorven]

3 rings of hexes out from your city.

 

[HamTard]

I have heard of 36 tiles. Is this three tiles in any horizontal or diagonal direction, i.e. where hexes sides fit together? How far can your work vertically?

Also, how much do roads cost to maintain?

Roads cost 1 gold per turn to maintain

 

[Superspank]

Does the value of a trade route increase over time? Why? Because of city growth or time passed?

 

[Kruelgor]

Yeah, as your city's cutlure increases so will your tiles. Also, you can buy tiles.