{"id":"S2007003911","label":"Speed zoning (Traffic engineering)","description":"Here are entered works on the determination and assignment of reasonable speeds for favorable driving conditions.","source_url":"https://id.loc.gov/authorities/subjects/sh2007003911","normalized_label":"speed zoning (traffic engineering)","broader":["http://id.loc.gov/authorities/subjects/sh85136766"],"aliases":["Speed zone engineering","Zoning, Speed"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2007003911","provider":"lcsh","revision":"c525a90c7a247f05","taxonomy_revision":"f050b5d4780b1289","title":"Speed zoning (Traffic engineering)","url":"/topics/S2007003911","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"4614087379303687712","address_version":"morton4x16-v1","coordinates":[0,478,33228,7168],"answer_status":"Directory metadata; local answer requires separate source review","truth_status":"Subject descriptor, not a factual answer or a demonstrated knowledge gap","reviewed_answer":null}