A road gully is a drainage chamber installed at the edge of a highway, typically with a kerb-side grating, that collects surface water run-off from carriageways and pavements. The gully contains a sump in which silt, leaves and grit settle, with a trapped outlet leading to the surface water or combined sewer beyond. In Greater London road gullies are maintained by the local highway authority or, on the Transport for London road network, by TfL. Cleaning is carried out by vacuum tankers on a scheduled cycle, particularly important in autumn when leaf fall can quickly cause blockages. Damaged gully covers or sunken frames are a common cause of complaints and can present a hazard to cyclists. Standards for gully construction follow BS EN 1433 and the Manual of Contract Documents for Highway Works.
Road gully
Highway drainage point with a kerb inlet collecting surface water from roads into sewers.
