No stopping (for bus drivers)
In Arabic:ممنوع التوقف (لسائقي الحافلات)
What it means
No stopping at any time, not even briefly to let passengers on or off. Use a proper bus stop.
About regulatory signs
Regulatory signs give orders. A red ring tells you something is not allowed, a blue disc tells you what you must do, and STOP and GIVE WAY have shapes of their own. Speed-limit signs show the number in Western digits with Arabic-Indic digits below.