Just a week ago, I noticed two speed detection cameras installed by the MOI on the Thuwal-Rabigh road. The problem is that there are no speed limit signs anywhere near these cameras, for miles and miles and no one knows what is the acceptable speed limit. Seems the purpose is to collect money only by hooking the mis-informed drivers. In Saudi Arabia a road with 4 lanes or a dual carriage should be with atleast 100kmph limit but these radars have been known for taking pictures of drivers at less than 100kmph also.

https://www.moi.gov.sa

When you dont see a speed limit sign, drive at 60kmph and pray to God that the camera has been set for lesser speeds.