Minh has spent much of the last year cataloguing the thousands of standard signs posted by highway departments across the United States. Cataloguing these signs has revealed a number of gaps in OpenStreetMap’s homegrown ontology for describing transportation features, which is historically heavily influenced by European standards. This exercise has given the community a framework for systematically closing the gaps and making the tagging system more flexible. Join Minh to gawk at some of the more unusual signs, and learn how you can contribute to this effort as a roadgeek, graphic designer, or tag connoisseur.