Please don't map for the renderer by creating non-existent sections of dual carriageway, as you have done on Cherry Blossom to the North of its junction with Tomalin Drive.

While you may feel that it looks better on the map when a non-existent split is introduced, not following established mapping conventions can impact other data consumers.

From https://wiki.openstreetmap.org/wiki/Dual_carriageway :
"Roads are not to be mapped as dual carriageways if the two directions are only separated

by paint. This includes single or multiple painted centre lines[1], hatched areas, channelized turn lanes[2], two-way turn lanes[2],
by flush medians[3],
or by any other means that is not a physical barrier to vehicles."