From Wazeopedia

Requests for closures link to this section

If you need to set or remove an RTC but the road segment is above your level or outside your editable area, you can always file a request. Requests for RTCs are welcome in the Slack closure channels: #30-vl_closures, #30-fr_fermetures, #30-bl_closures-bxl. With the script Send to Slack you can do this directly from WME. Non-Slack users may request closures on the forum.