Dense fog is expected in many parts of the UAE again on Monday morning. The Dubai Met Office said the UAE probably would have more fog over the next three to four days. "If not, it will be low clouds or mist for the next few days, resulting in low visibility," a spokeswoman said. The director of Dubai Police's traffic department, Brig Mohammed Saif al Zafeen, said people should allow extra time for their journeys. "Drivers should exercise caution and vigilance while driving and leave enough distance between their vehicle and the vehicle in front," Brig al Zafeen said. "Speed should be reduced and only change lanes if it is necessary and avoid using hazard lights, only in case of an emergency." Advertisements due to run in newspapers tomorrow urge motorists to ensure they follow the road rules, and keep their windscreens and headlights clean to ensure good visibility. Yesterday, some motorists who usually start their morning drive by 8am waited for the fog to lift after foggy conditions. "I took one look out the window and decided to read the papers online after I called my boss to say I was not driving in those conditions," said Charles Taylor, 33, an engineer from the UK. Mr Taylor said his employer also stayed in his apartment until the fog cleared by 10am in Dubai. "The sentiment on the roads now, especially after Fog Tuesday, is to take your time and not to risk driving in those conditions," he said. In March, 200 cars piled up in heavy fog in Ghantoot, killing six and injuring more than 350 people. Known as Fog Tuesday, it was the biggest road accident in UAE history. The accident resulted in a sweeping re-evaluation of emergency service procedures and prompted officials to ensure motorists were given early warnings of fog forecasts. Police also worked to improve communication with other emergency services when responding to major incidents and a victim care centre was created to support the injured. Thomas Neville, a 31-year-old Australian marketing executive who drives between Dubai and Abu Dhabi every morning, also refused to drive yesterday until the fog lifted. "I went to the gym and decided to have a larger than usual breakfast. There was no way I was going to attempt driving in fog that thick," Mr Neville said. Lindsay Boles, 25, a media buyer from the UK who drives to Abu Dhabi from Dubai every day, said: "I set off later than usual because the worst of it is in Ghantoot. A friend who did drive because of an early meeting said it was very bad in Ghantoot around 8am, but the visibility got a lot better after that." Police in Abu Dhabi have recommended schools start later than usual due to the fog as part of a strategy to avoid car crashes and lower the number of vehicles on the road. They have also suggested that people try to go to work earlier than usual. The fog usually starts spreading in the early morning and lifts by about 10am. Abu Dhabi International Airport was not affected by the heavy fog yesterday, but flights to airports elsewhere in the region were delayed or diverted. Heavy fog in Tehran caused the 3.30pm Etihad flight to redirect to Muscat, while the national airlines' flight to Dhaka remained in Abu Dhabi until fog at Bangladesh's international airport lifted. eharnan@thenational.ae