Vehicles queue up at a CNG filling station near Sheraton Hotel. This often causes traffic jams on the capital's busy Kazi Nazrul Islam Avenue. The CNG refuelling stations in the capital are struggling to cope with the ever-increasing demand for the fuel as conversion of petroleum-run vehicles continues at a very high pace. On average, about 2,000 vehicles are being converted into CNG-run ones every month, and about 92,135 vehicles were converted in 116 conversion workshops across the country until March this year.