When returning your car to the airport the spped limit drops to 60kph at the entrance and there is a speed camera. The taxi drivers assure me this goes off at 61kph. There is a huge warning strip across the road where the speed drops.
If refuelling, there is a petrol station a couple of kms before the airport if coming from Abu Dhabi. It gets very busy during evening rush hours and you could easily wait 20mins for fuel.