Dont follow the International rules.
follow the Qatar Rules

Round About : Those who enter to R/A with more speed, give the chance for them.If you not give the way, they will hit on your vehicle.

Line Change/ Track change: Here no priority from Left track to Right. If you want change track. two options for you.
Option 1: Just change the track, when you desire, the other vehicle will stop for you....but it is may be waste your time and more risky.
Option 2: If you given the signal for track change, immediately the vehicle on the same track will increase the speed...so after that vehicle pass..u can change the track.

Exits: If you make exit to service road, stop the car in the main road and allow the those vehicle comes from the service road, and make sure no more vehicle form the service road.

Parking: Dont park your vehilces the place, if thier more place for other parking, or in the parking lot, if you parking thier, you will get some damge on your vehicle bumper back or front side. Better parking only desert area.

finally, This is Qatar...dont follow the International rules.