Going on past experience, it is not easy getting road signs erected on housing developments. Usually as there is insufficient space. Where I live we asked the council for some road signs, what for is immaterial as it is road signs. Here it is not the council who decides but the Higway agency, they are responsible. So they came and had a look and there were no suitable places for them. Cars must see them so they cant be half on the pavement and half on someones garden. The actual sign that is on the pole. If you look at major roads, they are placed well back from the traffic so as not to cause damage. That was our experience anyway. But signs could be done in white on the road itself, but I don’t suppose they have thought of that.