accident angles broken clearing damage damaged danger dangerous dangling electricity elevation equipment external height heights high insulators machinery on-high perspectives power power-lines power-pole repair-crew repairing repairs risks risky safety snapped surface surfaces up-high work workman workmen access angle angled architectural architecture brickwork curved curving decorative foliage greenery handrails light passage passageway path pathway paved paving pedestrian pedestrians practical protective safe shade shadows shiny slant slanting slope sloping smooth stonework sunlight sunshine through underpass vegetation wall handrail advice alert announcement appropriate-behavior appropriate-behaviour be-careful beware care careful caution communicating communication concrete cycling cyclists ground-level informing lookout observant risk share sharing sign signs track walk walkers walking warning watch watch-out white appropriate behavior appropriate behaviour be careful blind blue cane clip art conditions directions graphics handicap line logo Look looking obstacles orientation person pictogram reserved symbol visually impaired white cane attention child conduct control course drive guide instructions kids law limit mother people protection respect road roadsign slow street traffic transportation way woman zone balance building building-construction building-work climb climbing construction construction-sites construction-work counter-weights crane ladder metal-work pipes railing rails security steel steel-framed straight tall weight weights work-safe aid assist assistance availability available aware awareness concern extinguish extinguisher fire fire-control fire-extinguisher firefighting foam help information limitations limited location observe red active activities adults adventure apartments children children’s-playground colorful colourful community community-leisure-area families fun highrise leisure open-air play playground playground-equipment playing rest restful safe-play shaded shelter sheltered Singapore supervise under-cover youngsters