background canada cutout green isolated leaf leaves maple no path plant tree white hospital limits hospital sign limited services limits no-can-do sign suburban hospital hazel nut alder brick bricked up closed concrete door entrance gateway no entry old wall walls banned bonfire circle do not fire illegal no bonfire prohibit prohibited prohibition quit red roadsign roadsigns signs stop access-denied advice alert appropriate-behavior appropriate-behaviour asbestos avoid black care communicating communication concern damage danger dangerous demolition denied destruction directions fence fencing hazard hazardous health-risks keep-out mesh message no-access no-entry not-allowed not-permitted permission-denied requirements restrictions risk risks risky safety unwanted warning warning-sign insiders limited access no public access restriction staff staff only workers