bicycle blue car command cycle entrance entry exit highway instruction no entry pole post red road rule rules sign sky white bend demolish field historic left meadow nature old paint painted roadsign rotten rusty spray street turn unclear warning black cold danger flood lightning rain storm security snow square thunderbolt travel water wet wild yellow cloud downpour drop droplet advice alert announcement be-careful beware care careful cars caution cautious communicating communication conditions dangerous information informing large-vehicles look-out observant risk risks road-conditions road-train rural-area safety semi-trailers signage slow-down speed speed-reduction symbol text traffic trailers transport transportation trucking trucks vehicles warning-sign watch watch-out words arrow crossroads direction directions indicator path paths roadsigns trail turning turnings wooden boom boomgate drivers lookout observe road-users acceptable advising allocated allocation appropriate-behavior appropriate-behaviour approved directing directional indication letter lettering off-road parking parking-bay public pullover roadside signs symbols across angle aware awareness convex frame high mirror reflect reflecting reflection view birds blue sky bright protection road crossing water birds water fowl wildlife ball child children city limit limits pedestrian play resident residental town urban village zone