(v5r, vt)to consult with; to discuss; to confer; to deliberate
意志疎通のはかり方は、文化によって決まるからである。 Knowing their languages is not enough to communicate effectively, because the methods of communication are determined by their cultures.
In other words, the merits, etc. of making detours are the consideration of the attitudes of the landowners whose property the line would cross, the convenience of other towns and villages, as well as connection with other railway lines.