At the moment, its somewhat difficult to read the map in terms of what the various lines and shapes mean. Right now, the roads and squares/plazas look a bit like a complex system of ponds and watercourses which is a little confusing. Also, the buildings look a bit divorced from the roads in many places which also contributes to making the roads look like something else. I think if you had your buildings more closely follow the roads in terms of placement (possibly added more buildings as well) it would help make the map clearer.