Section 321 in The West Bengal Motor Vehicles Rules, 1989
321.
Transport vehicles used solely for conservancy purposes may ply between 4 a.m. and 7 a.m. and transport vehicles used for road cleaning and road watering may ply between 2 p.m. and 3 p.m. on the roads round the Observatory Hill and on Auckland Road (from the Chowrasta to Tonga Road). Transport vehicles used solely for conservancy purposes may ply on the Roberston Road and Mount Pleasant Road.
