evidence: Multiple vehicle pile-ups and collisions due to fog on highways in northern India were reported over the last 48 hours. Besides the season’s first dense fog has also hit rail and and air traffic. [...] - At least three persons were killed and eight were injured after three vehicles piled up on the Lucknow-Agra Expressway on Monday morning due to dense fog. The accident occurred in the Erva Katra police station area. A truck, a sleeper bus, and a car crashed into each other, police said. [...] - On Sunday also, Haryana reported a highway pile-up due to low visibility. Seven vehicles crashed into one another near Aurangabad village in Yamunanagar.