Gurugram, Oct. 13 -- Gurugram traffic police issued 37,657 challans during a special enforcement drive from October 5 to 11, imposing fines worth Rs.4.1 crore, officials said on Monday. Of these, 21,326 challans were issued by traffic personnel and 16,331 through cameras. The fines related to on-ground enforcement, police said. Lane-change violations accounted for 10,445 camera-generated fines, followed by 3,936 for violating no-entry rules and 745 for speeding. On-ground enforcement included 1,469 fines for wrong-side driving, 1,409 for illegal parking, 1,472 for riding without helmets and 403 for drunk driving. Police said surveillance was intensified on NH-48, Dwarka Expressway and Mumbai Expressway using cameras and drones. Road safety awareness was held at 15 locations, reaching over 415 people...