 Improvements have been made to the existing North Circular, so that most of it is now dual carriageway.However, these have been done in a piecemeal fashion so that the road varies in quality and capacity along its length and still has several unimproved single carriageway sections and awkward junctions.By comparison, very little has been done to improve the condition of the South Circular Road (A205) (which has complex junctions and forks) and no part of the southern part of Ringway 2 has been built, mainly because of the density of the residential areas through which the South Circular runs.