OoC:
In the context of
TERRAIN and the
construction action, here follows a suggestion. . . .
Highway DDC: 15.
Build Cost: 6 GB x Trackless Movement Cost.
The extra cost associated with rugged/forbidding terrain is waived, as it is assumed to be covered in the above calculation. Extra cost for remote/very remote provinces applies normally.
Example: Building an highway in a remote hills province costs 36 GB. [6 x 4 x 1.5 = 36.] An extension of an highway can be built for one-half of the standard build cost.
Upkeep: 0.875 GB/turn in very remote provinces {0}; 0.75 GB/turn in remote provinces {1-3}; 0.625 GB/turn in semi-remote provinces {4-6}; 0.5 GB/turn in civilised provinces {7+}.
Add 0.25 GB/turn for each highway extension.
Benefits: A great highway spans the province, reaching two neighbouring provinces (unless the province with the highway borders less than two provinces). Highway extensions may be built, too, in order to link the main highway to additional neighbours.
Special: Work on an highway extension requires a separate
construction action.