Roads

From the Battle Bonuses Gurus:
>Roads are *always* considered to have the terrain that underlies them,
>except roads that run over mountains, which are considered hills terrain.
>(In general all battles in mountains are treated as hills terrain for bonuses.)
>A road in a forest is forest terrain, a road through hills is hills 
>terrain, etc.  You have to be careful because the road only goes through 
>one square at a time, and it's the underlying terrain of that square that 
>counts, not any adjacent squares.  A road can run on plains terrain through 
>a forest, or run on swamp terrain through hills, or whatever.  Road that run
>over mountains are unique - units fighting on roads in mountain terrain
>are given hills terrain bonuses, but the battle itself only costs
>2 movement points, instead of the normal 6 for regular hills terrain.