Roads looks more natural

[Trannitis]

Hello, it is possible to make roads looks more natural? I expalin it on screen. When i making roads with normal method it looks little squarely. Its possible to make them looks more roundly? I point it at ss

I wanna make road like red lines

 

[RokojoM]

EDIT: The rule of thumb is that your curvatures fit in each other, like this: http://4.ii.gl/D_iB8jBr.png