Gully traps on highways and flyovers are cleared once every six weeks with specialised equipment . the department currently employs eight in - house mechanical gully emptiers and six contractor s mechanical gully emptiers to provide gully emptying services . they are normally employed after midnight when traffic is light 现时，本署调配署内的八辆机动清渠车和承办商的六辆机动清渠车，提供清渠服务，并通常在午夜过后车辆较少时，派出机动清渠车清渠。
Gully traps on highways and flyovers are cleared once every six weeks with specialised equipment . the department currently employs eight in - house mechanical gully emptiers and six contractor s mechanical gully emptiers to provide gully emptying services . they are normally employed after midnight when traffic is light 现时，本署调配署内的八辆机动清渠车和承办商的六辆机动清渠车，提供清渠服务，并通常在午夜过后车辆较少时，派出机动清渠车清渠。
Direct public cleansing services range from street sweeping and washing , collection of household waste and on - street litter , gully emptying , desludging , to providing toilets for public convenience . these services are provided by our 5 300 cleansing staff or by our private contractors whose services are under our close supervision 直接的公共洁净服务包括清扫及清洗街道、收集住户废物和街头垃圾、清渠、清粪，以至设置公厕方便市民。这些服务由本署
