Section 316(2) in The West Bengal Motor Vehicles Rules, 1989
(2)Drivers of motor vehicles of which the speed is controlled and of another slow moving vehicles, shall keep to the extreme left of the road except when about to turn to the right, pass another vehicle or are standing at street intersections in obedience to traffic signals. Vehicles stopping at the road shall draw in to the side and taxis shall not loiter with the object of picking up passengers.
