Campaign map marching range and streets

[geala]

When I played EB as the Ptolemies I was always a bit annoyed about the range of armies marching cross country (in this case cross desert). I imagined the streets as rows of watering points and small supply stations without which no bigger army should dare to cross the desert. In the northern regions, walking cross country through woods or other rough terrain would also slow down a bigger army enormously. Streets or ways of any kind on the other hand are a great help for marching.

What I like to imply, would it be possible and plausible to give armies much more movepoints (I mean much!) on and near campaign map streets and hamper them greatly away from them? Or is it actually planned already? Or not, for coding reasons or gameplay considerations? Would make the control of streets an strategical and tactical goal and possession of some strongholds very important.