Regular readers of the Priority Setting Minutes will know inconsiderate parking is a regular complaint throughout the Stapleford, Trowell and Bramcote cluster. Councillor Jacky Williams has provided the definitive ruling on parking restrictions on West Avenue and elsewhere.
Full-time double yellow lines have not required an upright sign for years. When the prohibition of waiting applies 24 hours a day 365 days a year (as it does at West Avenue) it does not require a vertical sign (see extract below from Chapter 5 of Traffic Signs Manual). The only time double yellow lines would require an upright sign would be if they were seasonal (as you have at seaside resorts sometimes, where parking may be prohibited during the summer months). The limited waiting parking bay and the single yellow line have both got the appropriate signage in place.
For a more complete explanation, please click on the image.