Truck-laden smog guns had been deployed at 29 routes, including Umang Bhardwaj Chowk to Basai Flyover, Bakhtwar Chowk to Sector 46-47 dividing road via 47-49 and Nirvana Country Road, Cyber park Sector 46 to Hero Honda Chowk, Basai New Flyover to Sector 7 Chowk, New Colony to Railway Station and other key city stretches.