Movement cost bugs(?) thru the roads

[GhostQ]

I am not sure if anyone else notices this but in the earlier stages in the game(in the first era most generally) ur units pay the full movement cost when passing from a terrain which has a road built on it.
For example u just started the game and ur worker placed a road on a forest square and it costs u 1 movement point when u step on it with ur archer. Is this just some random bug or does it have a logical reason to occur all the time in the earlier times?

 

[lakon]

Maybe you crossed a river.
In that case it'll cost you a full point, because bridges will be build with a medieval technology (I think it's construction).

Lakon

 

[GhostQ]

thats it prolly. silly of me to not notice it till yet =(.
thanks a lot Lakon

 

[slothman]

Actually it's engineering. I changed it to construction when I though it would affect resources but since it doesn't I changed it back.