alert appropriate-behavior appropriate-behaviour area attention banned boundaries boundary cigarettes communicating communication danger direction directive distinctive entrance environment health health-risk limits location no-smoking not-allowed not-permitted penalties penalty permission-denied pollution prohibited prohibition shopping-center shopping-centre sign symbol thick thin unhealthy warning wording words advice black care circles concern dangerous denied directions disapproval disapproved inform information informing message messages pictograms prohibitions protect protection public red restricted restrictions rules safety signage signs symbols warning-sign white animals announcement careful caution control controlled dog dogs lead leash nature nature-reserve outdoor-activity outdoors park pet pets requirement restrain restrained restriction text under-control be-careful behave behavior behaviour beware communicate large-vehicles limitations limited lookout observant reversal reversing risk risks risky trucks vehicles watch watch-out alongside barrier below concrete dangers deep deep-water depth disused edge fence fencing foliage grass greenery handrails light path plants railing rails ripples rippling river riverside shade shadows steps sunlight sunshine track trail tree water wet advising be-prepared-to-stop cars hazard limited-access motorcars no-overtaking no-passing readiness ready road-sign roadwork slow traffic workers workmen alcohol conditions consumption listen Look looking no-alcohol no-swimming access-denied access-limited entry-denied entry-prohibited keep-off no-access no-entry prosecution trespass trespassing unauthorised unauthorized children observance road school schools slow-down slower speed time times zone Bin colors colours considerate consideration Dirt dirty garbage rubbish trams waste waste-bin waste-disposal yellow boating boats directing helpful informative rocks rocky shallow waterside