Official road signs are an essential safety feature. We track permanent signage that is installed and maintained by road operators on map.safe7y. We do not track advertising or any other type of roadside signage.
Here's an example on map.safe7y
SubType
Device
https://mutcd.fhwa.dot.gov/index.htm
https://wiki.openstreetmap.org/wiki/MUTCD
https://commons.wikimedia.org/wiki/Category:Diagrams_of_U.S._Regulatory_Signs
https://github.com/mapillary/mapillary_sprite_source/tree/master/package_signs/