black danger flood nature rain storm road security sign square street travel warning water wave weather wet wild yellow access-denied advice alert appropriate-behavior appropriate-behaviour avoid care communicating communication concern damage dangerous demolition denied destruction directions fence fencing keep-out mesh message no-access no-entry not-allowed not-permitted permission-denied prohibited prohibition red risk risks risky safety unwanted warning sign weathered white wire-mesh afraid chase child children children crossing crossing intrude kid kids play roadsign roadsigns run signs 30 direction limit number speed limit thirty vehicle village insiders limited access no public access restriction staff staff only workers atlantic beacon horizon island islet lighthouse norway ocean rocks sea tower approval approved bush-reserve conservation conserve inform information informing natural observation observe park permitted prohibitions protect protection public-park restrictions rules warning-sign architecture coast high landmark light sky Spain tall announcement be-careful beware careful caution colors colours communicate dangers drowning-danger lettering lookout observant restricted river riverside signage symbols text watch watch-out construction dig triangle worker