Keep in mind that Waze actually works best when roads are not divided, because all reports made in the app for the other carriageway on divided roads are in vain
, because the app currently doesn't support these kinds of reports. In addition, representing a road as two one-way sections makes it difficult to control U-turns properly. Road dividing used to be more common in the past, so we have since increased the conditions to be met before dividing a road.
If there is a perfectly working divided road that does not meet the above stated conditions in the editor, '''don't''' un-divide it. It's a lot of work that can be put into improving other areas of the Waze map, rather than the risk of losing valuable traffic data if editing is not done correctly.