alert animal animals announcement be careful beware black camel camels car care careful cars caution communicating communication danger drive driving informing lookout mammal observant observe reflective safety security sign vehicles warning watch watch out yellow aware awareness boards direction directions information informative observance observe regulations rough rules rustic visitors white wood wooden accident alarm burn chemical device emergency equipment extinguish extinguisher fire fire extinguisher logo firefighter fireman flame foam handle hazard heat help logo object pictogram precaution protection red rescue safe spray work appreciated appropriate-behavior appropriate-behaviour area cigarettes environment health health-risk no-smoking not-allowed not-permitted permission-denied pollution prohibited prohibition symbols thanks unhealthy circle denied directing directional directive no right turn not allowed not permitted parking permission denied road sign street sign traffic traffic flow verge appropriate behavior appropriate behaviour chinese dangers english no diving rain rain-drops risk risks signs swimmers swimming water wet black and white canine control controlled denial dog dogs-prohibited exception lead leash pets arrow dangerous door doors doorway emergency exit escape exit exiting green guide icon indoor instruction leaving life man path run running save symbol urgency wall be-careful cautionary cautionary-entrance-tape cautionary-tape Dirt discarded fallen ground pedestrians plastic tape watch-out clean clean-up cleanliness doggy-do droppings excrement excreta hygiene mess messy pickup poo prepared responsible sanitation waste