advice alert announcement appropriate-behavior appropriate-behaviour be-careful beware black care careful cars caution cautious communicating communication concern conditions danger dangerous directions informing Look looking lookout observant red risk risks road-conditions road-risks rural safety sign signs slippage slippery slow slow-down speed speed-reduction tractor tractors traffic vehicles warning warning-sign watch watch-out information large-vehicles look-out road-train rural-area semi-trailers signage symbol text trailers transport transportation trucking trucks white words city city traffic dark darkened early evening hazy lighting lights pedestrian bridge pedestrians rain reflecting reflections road conditions road curve shining shiny Singapore street light traffic flow traffic lights weather wet gravel yellow along Australia bare below construction development direction empty empty of traffic highway highways lamp-posts landscape left-hand driving lined lines looking down main road no motor cars no motor vehicles no vehicles road road rules roadwork roadworks stop stopped suburban suburbs traffic lanes wide wide road