When you are NOT sure that it is safe to reverse your vehicle you should

عندما تكون غير متأكدا من أمان الرجوع للخلف, عليك

Explanation: If you can't see all around your vehicle get out and have a look. You could also ask someone reliable outside the vehicle to guide you. A small child could easily be hidden directly behind you. Don't take risks.

Category: Arabic - Rules of the Road

References: The Official DVSA Guide to Driving: Section 9