As a dutch expat i also think Qatar traffic is nerve wrecking once in a while. In each every country you will find people from all kind of nationalities who act stupid, and deserve big fines.
I will admit that i also close the gaps in traffic and speed up while entering a roundabout but it feels much better when i give way to other traffic to merge and when i signal to a pedestrian to cross.
So when everybody can answer my question with " today" i think traffic will be alot smoother.

Ow yes here is a little hint; Buy mobile speed traps and use video surveillance.

Deepest regards

Jeroen