Abu Dhabi Police warned motorists travelling to the capital to exercise extreme caution. It said fog could make driving conditions challenging and impede visibility. Those who did not have to travel were urged to avoid the roads, while those who did should reduce speed and monitor the speed reduction system, it said. This system cuts the speed limit to 80kph and those who fail to adhere face fines. Foggy conditions have persisted across the UAE over the past week. The National Centre of Meteorology also warned the public that fog would linger over the country into Sunday morning.