From Longman Dictionary of Contemporary Englishroad signˈroad sign noun [countable] TTRa sign next to a road that gives information to drivers
Examples from the Corpus
road sign• Fisher's study also suggested that recall was not a good measure of whether a road sign had been heeded.• It didn't say Blackberry Hill anywhere, there was just an old-fashioned road sign saying Broughton Street was four miles away. 