alert appropriate-behavior appropriate-behaviour arrow black blue care communicating communication concern danger dangerous denied directions disapproval disapproved information informing no-standing not-allowed not-permitted permission-denied prohibited prohibition prohibitions protect protection red restricted restrictions risks risky roadside rules safety sign signs sun-rays sunlight sunlit symbols warning warning-sign white access-denied advice avoid damage demolition destruction fence fencing keep-out mesh message no-access no-entry risk unwanted warning sign weathered wire-mesh announcement aware awareness careful caution colors colours considerate consideration Dirt dirty garbage green limitations limited listen lookout rubbish waste waste-disposal watch-out 3-D area attention banned cigarettes 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 cars cautious conditions gravel Look looking observant road-conditions slippage slow slow-down speed speed-reduction traffic vehicles watch yellow communicate dangers drowning-danger lettering restriction river riverside signage 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 trees slippery law legal penalties refusal road road-safety road-side sky unacceptable verge antennae bees brown buzzing community furry hairy hive honey-bees insects movement on-guard pollinators protective soldier-bees striped swarm swarming transparent wings