The residents of Haripur District are exposed to the increasing noise and air pollution caused by vehicular traffic especially the tri-wheelers. The noise from these vehicles is much beyond the permissible limit set under the National Environmental Quality Standards NEQS, medical experts and citizens say. The ever increasing number of vehicles, particularly old model buses, vans, Suzuki pick-ups, trucks and the two-stroke rickshaws are considered to be the major contributors to noise pollution. Despite the fact the government has banned the manufacturing and registration of two stroke tri-wheelers across the country, the rickshaw owners of Haripur enjoy immunity in connivance with the authorities concerned. With the increase in population and abandoning of the centuries-old means of transportation -- Tonga -- the three-wheelers made their way into the life of citizens; their number started increasing with every passing day posing health hazards to the residents. There are over 4,000 rickshaws of different models and designs plying on the city roads as compared to only 120 rickshaws which were allowed by the district administration in 1994. A good numbers of these tri-wheelers are those which were banned in Karachi, Lahore and Peshawar.