NEW DELHI: Traffic personnel in the city face constant exposure to toxic fumes from petrol and diesel vehicles as well as the biting winter chill.For sub-inspector Sarita Shukla, who is posted at the Tughlaq Road Circle near the Indira Gandhi Memorial area, one of Lutyens' Delhi's busiest stretches surrounded by roundabouts, wide arterial roads and frequent VIP movement, the day begins early.Delhi’s...