3D background ball black car city color control design direction driving electric element frame futuristic glass graphic highway icon illustration image intersection isolated lamp light lights metal no red road round safety sci-fi shiny sign signal stop street symbol traffic travel urban vector warning advice alert announcement appropriate-behavior appropriate-behaviour banned be-careful beware care careful cars caution communicating communication concern danger dangerous directions informing listen Look looking lookout observant rain rain-drops risk risks signs trams warning-sign watch watch-out wet white crossing rails railway railway-crossing trains advising be-prepared-to-stop hazard information limited-access motorcars no-overtaking no-passing readiness ready risky road-sign roadwork slow vehicles workers workmen Bin colors colours considerate consideration Dirt dirty garbage rubbish waste waste-bin waste-disposal yellow blue hazardous orange signage slow-down words work communicate denied law legal no-standing not-allowed not-permitted park permission-denied prohibited prohibition refusal restricted restriction restrictions road-safety road-side sky unacceptable verge cautious conditions gravel road-conditions slippage speed speed-reduction slippery penalties clearway keep-clear no-parking no-temporary-parking