MUMBAI, Jan. 29 -- Colaba residents, including marine professionals from the neighbourdood, have urged the Maharashtra Maritime Board (MMB) to conduct a traffic simulation study at the Gateway of India before taking a decision on building a transport marina between the heritage monument and the Radio Club. They point out that the heritage precinct is already overwhelmed by vehicular and pedestrian traffic. Building a marina here, they say, would compound the traffic chaos in the area....