alert alternative-way announcement arrow be-careful beware black blocked blocked-path care careful caution communicating communication danger detour directing direction discoloration go-around informing lookout message observant observe pedestrians safety security sign warning watch watch-out wording words yellow appreciated appropriate-behavior appropriate-behaviour area black-&-white cigarettes environment gray grey greyscale health health-risk no-smoking not-allowed not-permitted permission-denied pollution prohibited prohibition thanks unhealthy cautionary cautionary-entrance-tape cautionary-tape Dirt discarded fallen ground plastic tape advice advising animal canine canine-guard communicate dog guard-dog information lettering letters mammal no-entry risk risky warned attention blue child conduct control course directions drive guide instructions kids law limit logo Look mother path pedestrian people pictogram protection respect road roadsign slow street symbol traffic transportation walk way woman zone bollard building burn christ colour cross death earth Easter ecology equator flame geography globe green insect jesus ladybug leaf outline planet protect rise from the dead shape sphere umbrella under construction comgrap01 cutter cutting equipment grass grass-cutter grass-cutting groundsman landscaping lawn lawn-care lawn-mower lawn-mowing machine machinery maintenance man mobile motor-mower motorised motorized park power public-area rotary-mower signage work workman activity at blank build construction council dig digging hazard industrial industry manual men metal repair repairing roadworks rope site triangle urban wall white wood worker works concern electric-power electrical electricity electricity-power-lines energy height high high-voltage overhead power-lines power-supply risks strength supply wires wiring