Highway authorities are under a statutory duty to prevent, so far as possible, the stopping up or obstruction of highways in their areas. This Practice Note provides guidance on highway obstructions under the Highways Act 1980 (HiA 1980) in the form of placing building works, scaffolding or skips on the highway. For details about obstructions on highways generally, see Practice Note: Obstruction of highways. For information on the remedies available to local authorities to deal with obstructions on the highway, see Practice Notes: Local authority powers to manage highway obstructions—criminal offences and Local authority powers to manage highway obstructions—civil remedies. Licences for building works, scaffolding and skips Placing scaffolding, hoardings or skips on the highway (including pavements) is an obstruction and may constitute a nuisance. HiA 1980, s 137(1) provides that a person who, without lawful authority or excuse, wilfully obstructs the free passage along a highway commits an offence and is liable to imprisonment for a term not exceeding 51 weeks or a fine, or both. See Practice Note: Obstruction of highways. However,