arches bridge cables concrete highway overpass pedestrian protection railing rails safety suspension suspension bridge walkway posts rods steel waterway buildings bus city colored colorful coloring colors coloured colourful colouring colours covered walkways cross-roads double-decker bus Hong Kong over-pass pedestrian walkways pedestrian-overpass pedestrians road roads taxi traffic transport transportation turning vehicles accommodation appartment blocks architecture building buildingns contrast contrasting curved double-decker tram flats from above height high highrise highrise accommodation homes looking down modern multi-storey multi-story perspectives street street-scene tall tower towering tram units views adelaide angle angles arched barrier bright footbridge handrail lights park path patterns peaceful perspective public park recreation recreational area relaxing river river-crossing shadow shadows sunlight sunshine appearances caged contained cover covered freeway light mesh metal protective public ribbing roof roofing safe secure security shelter sheltered support tunnel tunnelled