animal beware danger drive road safety security sign street traffic travel vehicle warning yellow 70 car cars information limited post signs speed bicycle cutout cycle isolation national path ride rider trail white appropriate behavior appropriate behaviour black communicating communication directing direction directional directive give way indication indicator informing road sign rules street sign traffic flow agrimotor circle horse red tractor triple wheel ahead arrow icy icy road river roadsign roadsigns wave waves advice alert appropriate-behavior appropriate-behaviour clearway communicate dangerous denied directions keep-clear law legal no-parking no-standing no-temporary-parking not-allowed not-permitted permission-denied prohibited prohibition refusal restricted restriction restrictions risk risks risky road-safety road-side unacceptable vehicles warning-sign driving forbidden overtake overtaking access-denied care caution parking advisory avenue calle cityscape crossroad crossroads highway intersection lane object pedestrian pedestrian crossing pedestrian sign roads roadway street scene streets