In recent years, bike lanes have begun to appear in cities such as New Delhi, Ahmedabad, Hyderabad and Pune.Not so in Kolkata.Dilip Kumar Adak, deputy commissioner of traffic police in Kolkata, said the bikes have been banned because of ???lack of space??? and because they slow the flow of traffic in the city.???We have a huge number of vehicles moving around Kolkata,??? Adak said. ???Even without