advice alert announcement appropriate-behavior appropriate-behaviour aware awareness care careful caution colors colours communicating communication concern considerate consideration directions Dirt dirty garbage green informing limitations limited listen lookout not-allowed not-permitted permission-denied prohibited prohibition risk risks rubbish safety sign signs unwanted warning warning-sign waste waste-disposal watch-out white 3-D area attention banned cigarettes danger direction directive distinctive environment eye-catching glassy health health-risk location no-smoking plastic pollution raised style surface surfaces surfacing symbol tactile texture textured textures thick thin unhealthy wording words be-careful beware black cars cautious conditions dangerous gravel Look looking observant red road-conditions slippage slow slow-down speed speed-reduction traffic vehicles watch yellow communicate dangers drowning-danger information lettering message restricted restriction restrictions risky river riverside signage symbols text water wet color coloration colored colorful colour coloured colourful hiking paths tracks walk walking walking-paths walking-tracks cliff cliffside deterioration fading-sign fall falling light shadows shapes shrubs sunlight trees slippery blue denied law legal no-standing penalties refusal road road-safety road-side sky unacceptable verge antennae avoid bees brown buzzing community furry hairy hive honey-bees insects movement on-guard pollinators protective soldier-bees striped swarm swarming transparent wings crossing pedestrians road-sign security share sharing stop street-sign traffic-flow walkers clearway keep-clear no-parking no-temporary-parking