access armed authorities authority availability available badges barriers cars communicating communication control deployment equipment flashing-lights law law-&-order lights motor-bikes National-Day on-duty on-the-job order patrols police police-vehicles power presence regulations responsible security Singapore symbols traffic traffic-control uniforms vehicles weapons abstract background bumps caution coloured design Dirt floor grunge health no non non-skid non-slip object occupational outdoor outside pad pads path pathway pattern pavers paving plastic prevent prevention rubber safety shape shiny sidewalk skid slip slipping stone street surface texture traction used walkway yellow abandoned aging agricultural appearances brown colors colours corroded corrosion damage damaged dark decay derelict deteriorating deterioration discarded discoloration discolouration disrepair dumped exposed farm farming iron machinery machines metal neglect neglected old rough rural rust rusty surfaces textures unwanted variety wearing weathered weathering wheels active activities adventure adventure-playground children children’s-playground climbing climbing-nets climbing-ropes families fun ground kids leisure light nets netting open park parkland peaceful perspective plants playground playing posts public quiet relaxing roped ropes secure shade shadows sunlight sunshine tranquil trees views anchorage anchored crew cruise cruise ship decks dock docked docking funnel harbor harbour heights high large levels life boats luxury luxury cruise motor boat navigation observation ocean liner passenger ship passengers pier protection railing rails rear red ship stern tiers tourism tourists wharf