帰属:Traffic signs are Crown copyright. You may reproduce traffic signs free of charge and without having to seek permission, but you must reproduce them accurately and not in a misleading context (e.g. not on roadside billboards where they could mislead drivers). (ref [1])
http://NationalArchives.gov.uk/doc/open-government-licence/version/1/OGL v1.0Open Government License version 1.0truetrue