If anything falls from a vehicle on to a motorway or other high-speed road, DO NOT remove the obstruction yourself. Stop in a place of relative safety (see Rule 275) and call the emergency services on 999.
On other roads, you should only remove obstructions if it is safe to do so.
Source note (app): Rule 280 refreshed from the Department for Transport’s GOV.UK Highway Code, checked 2026-09-06. This corrects the imported passage only; the rest of the archive has not been refreshed. © Crown copyright. Contains public sector information licensed under the Open Government Licence v3.0. Licence details: The National Archives, Open Government Licence v3.0. No government endorsement is implied.