do not cross red stripes tape warning white work asphalt barrel build building bulldozer caterpillar construction dig digger excavator lay machines not ready road roller steam track charity helpers level levelling levels men at work not-for-profit paving paving slabs preparation preparing preparing sand rail rake reflections sand shovel slabs steps voluntary volunteer workers volunteers workers active activities apology broken communicating communication equipment inconvenient information informing limitations limited limits message not-working out-of-order safety sign sorry to-be-fixed unfortunate unusable unworkable useless wording boom bucket cutout dig hole heavy equipment holes house isolated no backgroud rotating platform area away background beware black blue breaking car caution city drive fire icon illegal lane law metal no park parking pictogram prohibited prohibition symbol ticket tow tow-away traffic transport transportation trees truck urban violation wall zone appearance architectural architecture built Camp camp complex clock clock tower design elements external features gray grey height heritage historic malfunctioning masonry non-functioning not working old ornamental ornamentation out-of-sync perspectives roof roofing rooves solar solar heaters solar panels storage surfaces tanks time tin roof tower tower clock walls windows