After closing the old tram network in the mid 1960s, the people of Istanbul thought the unfashionable obstacle to smooth city travelling had been removed, and that city traffic would move faster than before, but it proved false some years later. An uncontrolled increase in the use of fossil fuel vehicles like buses, taxi, and private cars started choking the streets of Istanbul. Turkey suffered many of the problems of developing countries, including pollution, traffic jam, illegal migration, low literacy and high levels of population increase etc.