Aye, the major concentrations of bandits and raiders would be on the roads, so smaller caravans and wary players would instead trek through the wilderness (maybe have a skill which allows faster travel on the open country). The roads would have to reflect the war zone though, so the roads further back from the front line would be in better repair and safer, whilst those right in the thick of fighting would be teeming with soldiers and in bad condition from constant use.