Lacb, if you search these archives you will find an old post on Manor Mount. Before it, and other local roads became 20 mph at was a 30 mph zone. The council and TFL put is speed monitors, one on Waldenshaw Road and one on Manor Mount. Waldenshaw had an average of around 25 mph, Manor Mount had an average of c40 mph, the wrong way down Manor Mount!!!!!!!!!!
Both roads are too small to sustain heavy useage and Manor Mount and St. David's Roads are way too small for two way traffic.
Plus, take away to resident parking to make them two way (particularly on St. David's) and pressure is once more passed onto the already crowded local roads.
Leave things as they are and there is the occasional backup. So we are 5 minutes late for something, so what. What is so important that 5 minutes is that bad?