India&rsquos only tram system&mdashand an iconic part of Kolkata&rsquos old world charm&mdashjust got cooler. Calcutta Tramways has launched the city&rsquos first air-conditioned tram car, complete with sleek pneumatic doors. The refurbished 32-seater single coach operates in one of the city&rsquos oldest, most busy traffic routes, connecting Shyambazar and Esplanade. Travelling at a gentle 35kmph, it makes six round trips a day.